/usr/bin/java -Xmx16000000000 -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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 16:21:54,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 16:21:54,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 16:21:54,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 16:21:54,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 16:21:54,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 16:21:54,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 16:21:54,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 16:21:54,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 16:21:54,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 16:21:54,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 16:21:54,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 16:21:54,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 16:21:54,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 16:21:54,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 16:21:54,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 16:21:54,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 16:21:54,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 16:21:54,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 16:21:54,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 16:21:54,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 16:21:54,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 16:21:54,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 16:21:54,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 16:21:54,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-18 16:21:54,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-18 16:21:54,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-18 16:21:54,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-18 16:21:54,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-18 16:21:54,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-18 16:21:54,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-18 16:21:54,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-18 16:21:54,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-18 16:21:54,699 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-18 16:21:54,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-18 16:21:54,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-18 16:21:54,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-18 16:21:54,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-18 16:21:54,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 16:21:54,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 16:21:54,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 16:21:54,704 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-Separate.epf [2022-01-18 16:21:54,728 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 16:21:54,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 16:21:54,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 16:21:54,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 16:21:54,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 16:21:54,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 16:21:54,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 16:21:54,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 16:21:54,730 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 16:21:54,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 16:21:54,731 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 16:21:54,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 16:21:54,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 16:21:54,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 16:21:54,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 16:21:54,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 16:21:54,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 16:21:54,731 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 16:21:54,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 16:21:54,732 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 16:21:54,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 16:21:54,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 16:21:54,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 16:21:54,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 16:21:54,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 16:21:54,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:21:54,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 16:21:54,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 16:21:54,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 16:21:54,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 16:21:54,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 16:21:54,733 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 16:21:54,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 16:21:54,733 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 16:21:54,733 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 16:21:54,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 16:21:54,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 16:21:54,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 16:21:54,939 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 16:21:54,940 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 16:21:54,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl [2022-01-18 16:21:54,942 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl' [2022-01-18 16:21:54,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 16:21:54,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 16:21:54,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 16:21:54,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 16:21:54,968 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 16:21:54,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:21:54" (1/1) ... [2022-01-18 16:21:54,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:21:54" (1/1) ... [2022-01-18 16:21:54,984 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 16:21:54,985 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 16:21:54,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 16:21:54,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 16:21:54,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 16:21:54,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:21:54" (1/1) ... [2022-01-18 16:21:54,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:21:54" (1/1) ... [2022-01-18 16:21:54,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:21:54" (1/1) ... [2022-01-18 16:21:54,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:21:54" (1/1) ... [2022-01-18 16:21:54,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:21:54" (1/1) ... [2022-01-18 16:21:54,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:21:54" (1/1) ... [2022-01-18 16:21:54,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:21:54" (1/1) ... [2022-01-18 16:21:54,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 16:21:54,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 16:21:54,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 16:21:54,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 16:21:55,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:21:54" (1/1) ... [2022-01-18 16:21:55,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:21:55,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:55,040 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) [2022-01-18 16:21:55,059 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 [2022-01-18 16:21:55,068 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 16:21:55,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 16:21:55,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 16:21:55,068 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 16:21:55,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 16:21:55,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 16:21:55,069 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 16:21:55,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 16:21:55,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 16:21:55,070 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 16:21:55,101 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 16:21:55,102 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 16:21:55,201 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 16:21:55,222 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 16:21:55,222 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-18 16:21:55,222 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-01-18 16:21:55,223 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:21:55 BoogieIcfgContainer [2022-01-18 16:21:55,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 16:21:55,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 16:21:55,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 16:21:55,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 16:21:55,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:21:54" (1/2) ... [2022-01-18 16:21:55,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e62627c and model type send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:21:55, skipping insertion in model container [2022-01-18 16:21:55,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:21:55" (2/2) ... [2022-01-18 16:21:55,243 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive-alt.wvr.bpl [2022-01-18 16:21:55,246 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 16:21:55,246 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 16:21:55,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 16:21:55,246 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 16:21:55,301 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 16:21:55,345 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 16:21:55,351 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, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 16:21:55,352 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 16:21:55,361 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 58 flow [2022-01-18 16:21:55,375 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-18 16:21:55,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:55,394 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:55,394 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:55,398 INFO L85 PathProgramCache]: Analyzing trace with hash -603576974, now seen corresponding path program 1 times [2022-01-18 16:21:55,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:55,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309885091] [2022-01-18 16:21:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:55,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:55,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:55,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309885091] [2022-01-18 16:21:55,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309885091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:21:55,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:21:55,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:21:55,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133055463] [2022-01-18 16:21:55,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:21:55,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:21:55,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:55,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:21:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:21:55,579 INFO L87 Difference]: Start difference. First operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:55,613 INFO L93 Difference]: Finished difference Result 42 states and 82 transitions. [2022-01-18 16:21:55,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:21:55,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-18 16:21:55,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:55,621 INFO L225 Difference]: With dead ends: 42 [2022-01-18 16:21:55,622 INFO L226 Difference]: Without dead ends: 30 [2022-01-18 16:21:55,624 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 [2022-01-18 16:21:55,627 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:55,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:21:55,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-18 16:21:55,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-18 16:21:55,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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) [2022-01-18 16:21:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 57 transitions. [2022-01-18 16:21:55,656 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 57 transitions. Word has length 11 [2022-01-18 16:21:55,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:55,657 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 57 transitions. [2022-01-18 16:21:55,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:55,676 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 57 transitions. [2022-01-18 16:21:55,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 16:21:55,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:55,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:55,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 16:21:55,677 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:55,678 INFO L85 PathProgramCache]: Analyzing trace with hash -978133573, now seen corresponding path program 1 times [2022-01-18 16:21:55,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:55,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003720905] [2022-01-18 16:21:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:55,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:55,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:55,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003720905] [2022-01-18 16:21:55,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003720905] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:21:55,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:21:55,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 16:21:55,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874918477] [2022-01-18 16:21:55,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:21:55,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:21:55,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:55,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:21:55,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:21:55,707 INFO L87 Difference]: Start difference. First operand 30 states and 57 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:55,717 INFO L93 Difference]: Finished difference Result 32 states and 57 transitions. [2022-01-18 16:21:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:21:55,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-18 16:21:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:55,718 INFO L225 Difference]: With dead ends: 32 [2022-01-18 16:21:55,718 INFO L226 Difference]: Without dead ends: 31 [2022-01-18 16:21:55,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:21:55,720 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:55,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:21:55,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-18 16:21:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-18 16:21:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:55,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 56 transitions. [2022-01-18 16:21:55,724 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 56 transitions. Word has length 12 [2022-01-18 16:21:55,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:55,724 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 56 transitions. [2022-01-18 16:21:55,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 56 transitions. [2022-01-18 16:21:55,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 16:21:55,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:55,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:55,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 16:21:55,725 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:55,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:55,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1451787426, now seen corresponding path program 1 times [2022-01-18 16:21:55,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:55,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409753298] [2022-01-18 16:21:55,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:55,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:55,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:55,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409753298] [2022-01-18 16:21:55,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409753298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:55,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785944000] [2022-01-18 16:21:55,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:55,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:55,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:55,829 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) [2022-01-18 16:21:55,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 16:21:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:55,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 16:21:55,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:55,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-01-18 16:21:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:56,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:56,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:21:56,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:21:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:56,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785944000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:56,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:56,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 16:21:56,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9758991] [2022-01-18 16:21:56,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:56,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:21:56,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:21:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:21:56,185 INFO L87 Difference]: Start difference. First operand 31 states and 56 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:56,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:56,248 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2022-01-18 16:21:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 16:21:56,248 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 16:21:56,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:56,250 INFO L225 Difference]: With dead ends: 52 [2022-01-18 16:21:56,250 INFO L226 Difference]: Without dead ends: 41 [2022-01-18 16:21:56,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:21:56,251 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:56,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 72 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:21:56,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-18 16:21:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-01-18 16:21:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 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) [2022-01-18 16:21:56,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2022-01-18 16:21:56,256 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 15 [2022-01-18 16:21:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:56,256 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2022-01-18 16:21:56,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2022-01-18 16:21:56,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 16:21:56,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:56,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:56,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:56,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:56,458 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:56,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:56,459 INFO L85 PathProgramCache]: Analyzing trace with hash -552180542, now seen corresponding path program 1 times [2022-01-18 16:21:56,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:56,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505359802] [2022-01-18 16:21:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:56,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:56,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:56,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505359802] [2022-01-18 16:21:56,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505359802] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:21:56,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:21:56,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:21:56,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610297848] [2022-01-18 16:21:56,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:21:56,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:21:56,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:56,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:21:56,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:21:56,476 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:56,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:56,489 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2022-01-18 16:21:56,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:21:56,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 16:21:56,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:56,491 INFO L225 Difference]: With dead ends: 40 [2022-01-18 16:21:56,491 INFO L226 Difference]: Without dead ends: 40 [2022-01-18 16:21:56,492 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 [2022-01-18 16:21:56,492 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:56,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 14 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:21:56,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-18 16:21:56,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2022-01-18 16:21:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 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) [2022-01-18 16:21:56,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 65 transitions. [2022-01-18 16:21:56,496 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 65 transitions. Word has length 15 [2022-01-18 16:21:56,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:56,496 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 65 transitions. [2022-01-18 16:21:56,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:56,496 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 65 transitions. [2022-01-18 16:21:56,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 16:21:56,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:56,497 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:56,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 16:21:56,497 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:56,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:56,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1885895719, now seen corresponding path program 2 times [2022-01-18 16:21:56,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:56,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951529918] [2022-01-18 16:21:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:56,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:56,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:56,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951529918] [2022-01-18 16:21:56,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951529918] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:21:56,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:21:56,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 16:21:56,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886199018] [2022-01-18 16:21:56,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:21:56,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 16:21:56,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:56,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 16:21:56,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:21:56,532 INFO L87 Difference]: Start difference. First operand 35 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:56,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:56,551 INFO L93 Difference]: Finished difference Result 86 states and 160 transitions. [2022-01-18 16:21:56,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:21:56,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 16:21:56,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:56,555 INFO L225 Difference]: With dead ends: 86 [2022-01-18 16:21:56,555 INFO L226 Difference]: Without dead ends: 84 [2022-01-18 16:21:56,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:21:56,556 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:56,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:21:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-18 16:21:56,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2022-01-18 16:21:56,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:56,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2022-01-18 16:21:56,562 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 16 [2022-01-18 16:21:56,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:56,562 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2022-01-18 16:21:56,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:56,562 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2022-01-18 16:21:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:21:56,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:56,563 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:56,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 16:21:56,563 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:56,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:56,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2121429846, now seen corresponding path program 3 times [2022-01-18 16:21:56,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:56,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549263199] [2022-01-18 16:21:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:56,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:56,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:56,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549263199] [2022-01-18 16:21:56,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549263199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:56,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893457292] [2022-01-18 16:21:56,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:21:56,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:56,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:56,587 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) [2022-01-18 16:21:56,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 16:21:56,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:21:56,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:56,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 16:21:56,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:56,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:21:56,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893457292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:56,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:56,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-18 16:21:56,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068061413] [2022-01-18 16:21:56,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:56,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:21:56,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:21:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:21:56,667 INFO L87 Difference]: Start difference. First operand 58 states and 117 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:56,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:56,688 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2022-01-18 16:21:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:21:56,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:21:56,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:56,692 INFO L225 Difference]: With dead ends: 79 [2022-01-18 16:21:56,692 INFO L226 Difference]: Without dead ends: 79 [2022-01-18 16:21:56,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:21:56,694 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 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 [2022-01-18 16:21:56,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:21:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-18 16:21:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-01-18 16:21:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2022-01-18 16:21:56,701 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 19 [2022-01-18 16:21:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:56,701 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2022-01-18 16:21:56,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2022-01-18 16:21:56,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:21:56,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:56,702 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:56,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-18 16:21:56,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-18 16:21:56,904 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:56,905 INFO L85 PathProgramCache]: Analyzing trace with hash 169569482, now seen corresponding path program 1 times [2022-01-18 16:21:56,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:56,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275614571] [2022-01-18 16:21:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:56,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:57,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:57,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275614571] [2022-01-18 16:21:57,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275614571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:57,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550749551] [2022-01-18 16:21:57,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:57,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:57,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:57,040 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) [2022-01-18 16:21:57,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 16:21:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:57,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:21:57,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:57,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:57,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:57,225 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 37 treesize of output 19 [2022-01-18 16:21:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:57,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:57,364 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:57,364 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 40 treesize of output 58 [2022-01-18 16:21:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:57,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550749551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:57,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:57,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 16:21:57,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005198275] [2022-01-18 16:21:57,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:57,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:21:57,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:57,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:21:57,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:21:57,475 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2022-01-18 16:21:57,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:57,556 INFO L93 Difference]: Finished difference Result 114 states and 236 transitions. [2022-01-18 16:21:57,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 16:21:57,557 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 19 [2022-01-18 16:21:57,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:57,557 INFO L225 Difference]: With dead ends: 114 [2022-01-18 16:21:57,558 INFO L226 Difference]: Without dead ends: 97 [2022-01-18 16:21:57,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-01-18 16:21:57,558 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:57,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 83 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 68 Invalid, 0 Unknown, 3 Unchecked, 0.0s Time] [2022-01-18 16:21:57,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-18 16:21:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2022-01-18 16:21:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2022-01-18 16:21:57,563 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 19 [2022-01-18 16:21:57,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:57,563 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2022-01-18 16:21:57,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2022-01-18 16:21:57,564 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2022-01-18 16:21:57,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:21:57,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:57,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:57,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:57,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:57,779 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:57,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2094263290, now seen corresponding path program 2 times [2022-01-18 16:21:57,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:57,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953180822] [2022-01-18 16:21:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:57,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:57,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:57,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953180822] [2022-01-18 16:21:57,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953180822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:57,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851124995] [2022-01-18 16:21:57,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:21:57,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:57,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:57,870 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) [2022-01-18 16:21:57,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 16:21:57,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:21:57,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:21:57,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:57,993 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:21:57,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2022-01-18 16:21:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:58,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:58,122 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:58,123 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 40 treesize of output 58 [2022-01-18 16:21:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:58,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851124995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:58,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:58,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-18 16:21:58,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528875528] [2022-01-18 16:21:58,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:58,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 16:21:58,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:58,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 16:21:58,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-18 16:21:58,251 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:58,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:58,310 INFO L93 Difference]: Finished difference Result 111 states and 224 transitions. [2022-01-18 16:21:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 16:21:58,310 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:21:58,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:58,311 INFO L225 Difference]: With dead ends: 111 [2022-01-18 16:21:58,311 INFO L226 Difference]: Without dead ends: 96 [2022-01-18 16:21:58,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-18 16:21:58,312 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:58,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 126 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:21:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-18 16:21:58,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2022-01-18 16:21:58,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:58,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 163 transitions. [2022-01-18 16:21:58,316 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 163 transitions. Word has length 19 [2022-01-18 16:21:58,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:58,316 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 163 transitions. [2022-01-18 16:21:58,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:58,316 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 163 transitions. [2022-01-18 16:21:58,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 16:21:58,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:58,317 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:58,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:58,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:58,531 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:58,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:58,532 INFO L85 PathProgramCache]: Analyzing trace with hash 327811023, now seen corresponding path program 3 times [2022-01-18 16:21:58,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:58,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783280988] [2022-01-18 16:21:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:58,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:58,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:58,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783280988] [2022-01-18 16:21:58,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783280988] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:58,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878190484] [2022-01-18 16:21:58,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:21:58,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:58,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:58,562 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) [2022-01-18 16:21:58,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 16:21:58,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:21:58,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:58,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:21:58,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:58,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:58,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878190484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:58,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:58,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 16:21:58,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965046795] [2022-01-18 16:21:58,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:58,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:21:58,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:58,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:21:58,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:21:58,657 INFO L87 Difference]: Start difference. First operand 82 states and 163 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:58,674 INFO L93 Difference]: Finished difference Result 181 states and 351 transitions. [2022-01-18 16:21:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:21:58,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-01-18 16:21:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:58,675 INFO L225 Difference]: With dead ends: 181 [2022-01-18 16:21:58,675 INFO L226 Difference]: Without dead ends: 178 [2022-01-18 16:21:58,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:21:58,677 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:58,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 40 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:21:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-18 16:21:58,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 106. [2022-01-18 16:21:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 220 transitions. [2022-01-18 16:21:58,689 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 220 transitions. Word has length 20 [2022-01-18 16:21:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:58,689 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 220 transitions. [2022-01-18 16:21:58,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 220 transitions. [2022-01-18 16:21:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:21:58,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:58,690 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:58,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:58,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:58,891 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:58,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:58,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1610697433, now seen corresponding path program 4 times [2022-01-18 16:21:58,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:58,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379674597] [2022-01-18 16:21:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:58,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:58,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:58,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379674597] [2022-01-18 16:21:58,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379674597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:58,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540684029] [2022-01-18 16:21:58,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:21:58,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:58,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:58,988 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) [2022-01-18 16:21:58,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 16:21:59,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:21:59,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:59,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:21:59,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:59,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:59,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:59,165 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 37 treesize of output 19 [2022-01-18 16:21:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:59,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:59,351 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:59,352 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 40 treesize of output 58 [2022-01-18 16:21:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:59,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540684029] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:59,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:59,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 16:21:59,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373658446] [2022-01-18 16:21:59,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:59,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:21:59,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:59,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:21:59,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:21:59,447 INFO L87 Difference]: Start difference. First operand 106 states and 220 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:59,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:59,520 INFO L93 Difference]: Finished difference Result 169 states and 355 transitions. [2022-01-18 16:21:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 16:21:59,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 16:21:59,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:59,521 INFO L225 Difference]: With dead ends: 169 [2022-01-18 16:21:59,521 INFO L226 Difference]: Without dead ends: 154 [2022-01-18 16:21:59,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-01-18 16:21:59,522 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:59,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 93 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 3 Unchecked, 0.0s Time] [2022-01-18 16:21:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-18 16:21:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 100. [2022-01-18 16:21:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.090909090909091) internal successors, (207), 99 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:59,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 207 transitions. [2022-01-18 16:21:59,525 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 207 transitions. Word has length 22 [2022-01-18 16:21:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:59,525 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 207 transitions. [2022-01-18 16:21:59,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:59,526 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 207 transitions. [2022-01-18 16:21:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:21:59,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:59,526 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:59,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:59,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:59,740 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:59,741 INFO L85 PathProgramCache]: Analyzing trace with hash -476045102, now seen corresponding path program 5 times [2022-01-18 16:21:59,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:59,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777401391] [2022-01-18 16:21:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:59,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:59,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:59,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777401391] [2022-01-18 16:21:59,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777401391] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:59,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668149828] [2022-01-18 16:21:59,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:21:59,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:59,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:59,888 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) [2022-01-18 16:21:59,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 16:21:59,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:21:59,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:59,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:21:59,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:00,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:00,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:00,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:00,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:00,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:00,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:00,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 24 [2022-01-18 16:22:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:00,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:00,365 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:22:00,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-01-18 16:22:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:00,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668149828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:00,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:00,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 16:22:00,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181630399] [2022-01-18 16:22:00,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:00,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:22:00,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:22:00,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:22:00,520 INFO L87 Difference]: Start difference. First operand 100 states and 207 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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) [2022-01-18 16:22:00,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:00,885 INFO L93 Difference]: Finished difference Result 568 states and 1167 transitions. [2022-01-18 16:22:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 16:22:00,885 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 23 [2022-01-18 16:22:00,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:00,886 INFO L225 Difference]: With dead ends: 568 [2022-01-18 16:22:00,886 INFO L226 Difference]: Without dead ends: 359 [2022-01-18 16:22:00,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:22:00,887 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 243 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:00,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 282 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 235 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2022-01-18 16:22:00,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-18 16:22:00,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 156. [2022-01-18 16:22:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.232258064516129) internal successors, (346), 155 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:00,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 346 transitions. [2022-01-18 16:22:00,894 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 346 transitions. Word has length 23 [2022-01-18 16:22:00,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:00,895 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 346 transitions. [2022-01-18 16:22:00,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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) [2022-01-18 16:22:00,895 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 346 transitions. [2022-01-18 16:22:00,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:22:00,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:00,896 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:00,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:01,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:01,109 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:01,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:01,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1438145602, now seen corresponding path program 6 times [2022-01-18 16:22:01,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:01,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898206344] [2022-01-18 16:22:01,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:01,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:01,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:01,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898206344] [2022-01-18 16:22:01,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898206344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:01,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887308482] [2022-01-18 16:22:01,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:22:01,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:01,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:01,219 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) [2022-01-18 16:22:01,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 16:22:01,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:22:01,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:01,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 16:22:01,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:01,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:01,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:01,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:01,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:01,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:01,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:01,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2022-01-18 16:22:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:01,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:01,688 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:22:01,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-01-18 16:22:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:01,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887308482] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:01,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:01,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 16:22:01,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755091932] [2022-01-18 16:22:01,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:01,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:22:01,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:01,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:22:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:22:01,891 INFO L87 Difference]: Start difference. First operand 156 states and 346 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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) [2022-01-18 16:22:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:02,054 INFO L93 Difference]: Finished difference Result 304 states and 663 transitions. [2022-01-18 16:22:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 16:22:02,055 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 23 [2022-01-18 16:22:02,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:02,056 INFO L225 Difference]: With dead ends: 304 [2022-01-18 16:22:02,056 INFO L226 Difference]: Without dead ends: 274 [2022-01-18 16:22:02,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:22:02,057 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 100 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:02,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 281 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 230 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-01-18 16:22:02,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-18 16:22:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 166. [2022-01-18 16:22:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.16969696969697) internal successors, (358), 165 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 358 transitions. [2022-01-18 16:22:02,061 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 358 transitions. Word has length 23 [2022-01-18 16:22:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:02,061 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 358 transitions. [2022-01-18 16:22:02,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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) [2022-01-18 16:22:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 358 transitions. [2022-01-18 16:22:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:22:02,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:02,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:02,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:02,272 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,SelfDestructingSolverStorable11 [2022-01-18 16:22:02,272 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:02,273 INFO L85 PathProgramCache]: Analyzing trace with hash 983926786, now seen corresponding path program 7 times [2022-01-18 16:22:02,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:02,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878938311] [2022-01-18 16:22:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:02,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:02,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:02,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878938311] [2022-01-18 16:22:02,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878938311] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:02,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963224675] [2022-01-18 16:22:02,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:22:02,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:02,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:02,392 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) [2022-01-18 16:22:02,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 16:22:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:02,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 16:22:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:02,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:02,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:02,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:02,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:02,589 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2022-01-18 16:22:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:02,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:02,813 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:22:02,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-01-18 16:22:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:02,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963224675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:02,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:02,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 16:22:02,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190219445] [2022-01-18 16:22:02,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:02,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:22:02,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:02,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:22:02,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:22:02,999 INFO L87 Difference]: Start difference. First operand 166 states and 358 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:03,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:03,417 INFO L93 Difference]: Finished difference Result 629 states and 1277 transitions. [2022-01-18 16:22:03,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 16:22:03,417 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 16:22:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:03,419 INFO L225 Difference]: With dead ends: 629 [2022-01-18 16:22:03,419 INFO L226 Difference]: Without dead ends: 415 [2022-01-18 16:22:03,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:22:03,420 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 209 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:03,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 455 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 422 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-01-18 16:22:03,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-18 16:22:03,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 193. [2022-01-18 16:22:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1770833333333335) internal successors, (418), 192 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 418 transitions. [2022-01-18 16:22:03,424 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 418 transitions. Word has length 23 [2022-01-18 16:22:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:03,425 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 418 transitions. [2022-01-18 16:22:03,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 418 transitions. [2022-01-18 16:22:03,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:22:03,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:03,425 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:03,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:03,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 16:22:03,645 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:03,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1396849806, now seen corresponding path program 8 times [2022-01-18 16:22:03,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:03,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91431326] [2022-01-18 16:22:03,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:03,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:03,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:03,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91431326] [2022-01-18 16:22:03,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91431326] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:03,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184161989] [2022-01-18 16:22:03,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:22:03,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:03,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:03,744 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) [2022-01-18 16:22:03,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 16:22:03,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:22:03,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:03,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 16:22:03,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:03,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:03,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:03,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:03,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:03,962 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2022-01-18 16:22:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:03,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:04,214 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:22:04,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-01-18 16:22:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:04,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184161989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:04,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:04,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 16:22:04,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133494530] [2022-01-18 16:22:04,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:04,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:22:04,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:04,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:22:04,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:22:04,427 INFO L87 Difference]: Start difference. First operand 193 states and 418 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:04,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:04,778 INFO L93 Difference]: Finished difference Result 452 states and 974 transitions. [2022-01-18 16:22:04,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 16:22:04,779 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 16:22:04,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:04,780 INFO L225 Difference]: With dead ends: 452 [2022-01-18 16:22:04,780 INFO L226 Difference]: Without dead ends: 387 [2022-01-18 16:22:04,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=825, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:22:04,781 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 143 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:04,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 355 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 267 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-01-18 16:22:04,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-18 16:22:04,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 152. [2022-01-18 16:22:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.0728476821192054) internal successors, (313), 151 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:04,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 313 transitions. [2022-01-18 16:22:04,784 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 313 transitions. Word has length 23 [2022-01-18 16:22:04,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:04,784 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 313 transitions. [2022-01-18 16:22:04,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:04,785 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 313 transitions. [2022-01-18 16:22:04,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:22:04,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:04,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:04,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:04,999 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,SelfDestructingSolverStorable13 [2022-01-18 16:22:05,000 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:05,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:05,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2108487170, now seen corresponding path program 9 times [2022-01-18 16:22:05,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:05,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314534796] [2022-01-18 16:22:05,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:05,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:05,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:05,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314534796] [2022-01-18 16:22:05,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314534796] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:05,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833568020] [2022-01-18 16:22:05,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:22:05,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:05,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:05,101 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) [2022-01-18 16:22:05,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 16:22:05,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:22:05,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:05,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 16:22:05,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:05,287 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:22:05,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 24 [2022-01-18 16:22:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:05,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:05,493 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:22:05,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-01-18 16:22:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:05,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833568020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:05,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:05,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 16:22:05,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752342247] [2022-01-18 16:22:05,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:05,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 16:22:05,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:05,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 16:22:05,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-01-18 16:22:05,683 INFO L87 Difference]: Start difference. First operand 152 states and 313 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2022-01-18 16:22:05,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:05,829 INFO L93 Difference]: Finished difference Result 303 states and 621 transitions. [2022-01-18 16:22:05,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 16:22:05,829 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 23 [2022-01-18 16:22:05,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:05,830 INFO L225 Difference]: With dead ends: 303 [2022-01-18 16:22:05,830 INFO L226 Difference]: Without dead ends: 288 [2022-01-18 16:22:05,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-18 16:22:05,831 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 101 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:05,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 214 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:22:05,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-18 16:22:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 167. [2022-01-18 16:22:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.0602409638554215) internal successors, (342), 166 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 342 transitions. [2022-01-18 16:22:05,834 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 342 transitions. Word has length 23 [2022-01-18 16:22:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:05,834 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 342 transitions. [2022-01-18 16:22:05,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2022-01-18 16:22:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 342 transitions. [2022-01-18 16:22:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:22:05,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:05,835 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:05,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:06,050 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,SelfDestructingSolverStorable14 [2022-01-18 16:22:06,050 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:06,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash 768751303, now seen corresponding path program 10 times [2022-01-18 16:22:06,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:06,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037599424] [2022-01-18 16:22:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:06,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:06,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:06,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037599424] [2022-01-18 16:22:06,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037599424] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:06,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101740160] [2022-01-18 16:22:06,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:22:06,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:06,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:06,079 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) [2022-01-18 16:22:06,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 16:22:06,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:22:06,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:06,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 16:22:06,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:06,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:06,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101740160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:06,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:06,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 16:22:06,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452185725] [2022-01-18 16:22:06,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:06,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 16:22:06,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:06,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 16:22:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:22:06,162 INFO L87 Difference]: Start difference. First operand 167 states and 342 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:06,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:06,188 INFO L93 Difference]: Finished difference Result 333 states and 673 transitions. [2022-01-18 16:22:06,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 16:22:06,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 16:22:06,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:06,189 INFO L225 Difference]: With dead ends: 333 [2022-01-18 16:22:06,189 INFO L226 Difference]: Without dead ends: 329 [2022-01-18 16:22:06,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:22:06,190 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:06,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 48 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:22:06,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-18 16:22:06,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 207. [2022-01-18 16:22:06,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.1116504854368934) internal successors, (435), 206 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 435 transitions. [2022-01-18 16:22:06,195 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 435 transitions. Word has length 24 [2022-01-18 16:22:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:06,195 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 435 transitions. [2022-01-18 16:22:06,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 435 transitions. [2022-01-18 16:22:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:22:06,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:06,196 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:06,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:06,411 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,SelfDestructingSolverStorable15 [2022-01-18 16:22:06,411 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:06,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1202293654, now seen corresponding path program 11 times [2022-01-18 16:22:06,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:06,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203211323] [2022-01-18 16:22:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:06,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:22:06,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:06,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203211323] [2022-01-18 16:22:06,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203211323] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:06,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185238187] [2022-01-18 16:22:06,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:22:06,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:06,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:06,555 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) [2022-01-18 16:22:06,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 16:22:06,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:22:06,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:06,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:22:06,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:06,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:06,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:06,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:06,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:06,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:06,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:06,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:06,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:06,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:06,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:06,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:06,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:06,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:06,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:06,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:06,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:06,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2022-01-18 16:22:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:06,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:07,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:07,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:07,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 144 [2022-01-18 16:22:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:07,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185238187] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:07,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:07,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-01-18 16:22:07,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246202790] [2022-01-18 16:22:07,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:07,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:22:07,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:07,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:22:07,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:22:07,442 INFO L87 Difference]: Start difference. First operand 207 states and 435 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:08,222 INFO L93 Difference]: Finished difference Result 828 states and 1696 transitions. [2022-01-18 16:22:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 16:22:08,223 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:22:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:08,225 INFO L225 Difference]: With dead ends: 828 [2022-01-18 16:22:08,225 INFO L226 Difference]: Without dead ends: 608 [2022-01-18 16:22:08,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=396, Invalid=1674, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:22:08,226 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 271 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:08,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 659 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 559 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-01-18 16:22:08,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-01-18 16:22:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 303. [2022-01-18 16:22:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.198675496688742) internal successors, (664), 302 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) [2022-01-18 16:22:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 664 transitions. [2022-01-18 16:22:08,233 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 664 transitions. Word has length 27 [2022-01-18 16:22:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:08,233 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 664 transitions. [2022-01-18 16:22:08,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:08,233 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 664 transitions. [2022-01-18 16:22:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:22:08,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:08,234 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:08,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:08,434 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,SelfDestructingSolverStorable16 [2022-01-18 16:22:08,434 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:08,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:08,435 INFO L85 PathProgramCache]: Analyzing trace with hash 722400154, now seen corresponding path program 12 times [2022-01-18 16:22:08,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:08,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247817420] [2022-01-18 16:22:08,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:08,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:08,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:08,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247817420] [2022-01-18 16:22:08,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247817420] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:08,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956763089] [2022-01-18 16:22:08,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:22:08,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:08,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:08,578 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) [2022-01-18 16:22:08,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 16:22:08,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:22:08,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:08,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:22:08,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:08,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:08,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:08,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:08,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:08,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:08,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:08,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:08,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:08,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:08,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:08,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:08,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:08,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-01-18 16:22:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:08,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:09,223 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:22:09,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-01-18 16:22:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:09,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956763089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:09,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:09,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-01-18 16:22:09,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996733125] [2022-01-18 16:22:09,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:09,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:22:09,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:09,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:22:09,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:22:09,578 INFO L87 Difference]: Start difference. First operand 303 states and 664 transitions. Second operand has 26 states, 26 states have (on average 2.5) 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) [2022-01-18 16:22:10,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:10,016 INFO L93 Difference]: Finished difference Result 786 states and 1699 transitions. [2022-01-18 16:22:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 16:22:10,016 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) 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 27 [2022-01-18 16:22:10,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:10,018 INFO L225 Difference]: With dead ends: 786 [2022-01-18 16:22:10,018 INFO L226 Difference]: Without dead ends: 721 [2022-01-18 16:22:10,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=1258, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:22:10,019 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 149 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:10,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 421 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 335 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2022-01-18 16:22:10,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-01-18 16:22:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 267. [2022-01-18 16:22:10,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.0977443609022557) internal successors, (558), 266 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 558 transitions. [2022-01-18 16:22:10,025 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 558 transitions. Word has length 27 [2022-01-18 16:22:10,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:10,025 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 558 transitions. [2022-01-18 16:22:10,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) 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) [2022-01-18 16:22:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 558 transitions. [2022-01-18 16:22:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:22:10,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:10,026 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:10,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:10,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:10,241 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:10,242 INFO L85 PathProgramCache]: Analyzing trace with hash 258366058, now seen corresponding path program 13 times [2022-01-18 16:22:10,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:10,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928831896] [2022-01-18 16:22:10,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:10,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:10,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:10,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928831896] [2022-01-18 16:22:10,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928831896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:10,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692588144] [2022-01-18 16:22:10,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:22:10,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:10,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:10,382 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) [2022-01-18 16:22:10,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 16:22:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:10,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:22:10,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:10,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:10,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:10,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:10,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:10,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:10,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:10,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:10,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:10,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:10,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:10,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:10,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:10,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-01-18 16:22:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:10,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:11,043 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:22:11,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-01-18 16:22:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:11,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692588144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:11,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:11,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 16:22:11,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86383817] [2022-01-18 16:22:11,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:11,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 16:22:11,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:11,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 16:22:11,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:22:11,233 INFO L87 Difference]: Start difference. First operand 267 states and 558 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) 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) [2022-01-18 16:22:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:11,492 INFO L93 Difference]: Finished difference Result 561 states and 1187 transitions. [2022-01-18 16:22:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 16:22:11,492 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) 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 27 [2022-01-18 16:22:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:11,493 INFO L225 Difference]: With dead ends: 561 [2022-01-18 16:22:11,493 INFO L226 Difference]: Without dead ends: 527 [2022-01-18 16:22:11,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:22:11,494 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 147 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:11,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 344 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 218 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-01-18 16:22:11,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-18 16:22:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 276. [2022-01-18 16:22:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.090909090909091) internal successors, (575), 275 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 575 transitions. [2022-01-18 16:22:11,499 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 575 transitions. Word has length 27 [2022-01-18 16:22:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:11,499 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 575 transitions. [2022-01-18 16:22:11,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) 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) [2022-01-18 16:22:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 575 transitions. [2022-01-18 16:22:11,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:22:11,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:11,500 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:11,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-18 16:22:11,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:11,707 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:11,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1292581990, now seen corresponding path program 14 times [2022-01-18 16:22:11,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:11,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748748568] [2022-01-18 16:22:11,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:11,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:11,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:11,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748748568] [2022-01-18 16:22:11,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748748568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:11,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688919401] [2022-01-18 16:22:11,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:22:11,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:11,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:11,841 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) [2022-01-18 16:22:11,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 16:22:11,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:22:11,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:11,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:22:11,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:12,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:12,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:12,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:12,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:12,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:12,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:12,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:12,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:12,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:12,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:12,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:12,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:12,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-01-18 16:22:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:12,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:12,489 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:22:12,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-01-18 16:22:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:12,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688919401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:12,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:12,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-01-18 16:22:12,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55196911] [2022-01-18 16:22:12,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:12,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:22:12,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:12,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:22:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:22:12,822 INFO L87 Difference]: Start difference. First operand 276 states and 575 transitions. Second operand has 25 states, 25 states have (on average 2.48) 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) [2022-01-18 16:22:13,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:13,593 INFO L93 Difference]: Finished difference Result 1378 states and 2828 transitions. [2022-01-18 16:22:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:22:13,593 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) 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 27 [2022-01-18 16:22:13,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:13,596 INFO L225 Difference]: With dead ends: 1378 [2022-01-18 16:22:13,596 INFO L226 Difference]: Without dead ends: 1124 [2022-01-18 16:22:13,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:22:13,597 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 292 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:13,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 702 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 641 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-01-18 16:22:13,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-01-18 16:22:13,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 483. [2022-01-18 16:22:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.2053941908713695) internal successors, (1063), 482 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1063 transitions. [2022-01-18 16:22:13,607 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1063 transitions. Word has length 27 [2022-01-18 16:22:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:13,607 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1063 transitions. [2022-01-18 16:22:13,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) 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) [2022-01-18 16:22:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1063 transitions. [2022-01-18 16:22:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:22:13,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:13,608 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:13,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:13,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:13,823 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:13,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash 168077722, now seen corresponding path program 15 times [2022-01-18 16:22:13,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:13,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914510869] [2022-01-18 16:22:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:13,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:13,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:13,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914510869] [2022-01-18 16:22:13,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914510869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:13,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500209584] [2022-01-18 16:22:13,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:22:13,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:13,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:13,972 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) [2022-01-18 16:22:13,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 16:22:13,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:22:13,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:13,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:22:13,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:14,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:14,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:14,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:14,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:14,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:14,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:14,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:14,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:14,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:14,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:14,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:14,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-01-18 16:22:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:14,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:14,686 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:22:14,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-01-18 16:22:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:15,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500209584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:15,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:15,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 16:22:15,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008381327] [2022-01-18 16:22:15,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:15,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:22:15,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:15,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:22:15,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:22:15,027 INFO L87 Difference]: Start difference. First operand 483 states and 1063 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) 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) [2022-01-18 16:22:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:15,372 INFO L93 Difference]: Finished difference Result 1102 states and 2399 transitions. [2022-01-18 16:22:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 16:22:15,372 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) 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 27 [2022-01-18 16:22:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:15,375 INFO L225 Difference]: With dead ends: 1102 [2022-01-18 16:22:15,375 INFO L226 Difference]: Without dead ends: 984 [2022-01-18 16:22:15,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=966, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:22:15,375 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 167 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:15,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 547 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 428 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2022-01-18 16:22:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-01-18 16:22:15,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 557. [2022-01-18 16:22:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 2.221223021582734) internal successors, (1235), 556 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1235 transitions. [2022-01-18 16:22:15,385 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1235 transitions. Word has length 27 [2022-01-18 16:22:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:15,385 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 1235 transitions. [2022-01-18 16:22:15,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) 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) [2022-01-18 16:22:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1235 transitions. [2022-01-18 16:22:15,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:22:15,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:15,386 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:15,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:15,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:15,602 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:15,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:15,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1021849130, now seen corresponding path program 16 times [2022-01-18 16:22:15,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:15,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063155372] [2022-01-18 16:22:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:15,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:15,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:15,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063155372] [2022-01-18 16:22:15,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063155372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:15,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637641754] [2022-01-18 16:22:15,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:22:15,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:15,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:15,750 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) [2022-01-18 16:22:15,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 16:22:15,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:22:15,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:15,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:22:15,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:16,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:16,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:16,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:16,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:16,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:16,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:16,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:16,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:16,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-01-18 16:22:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:16,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:16,419 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:22:16,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-01-18 16:22:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:16,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637641754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:16,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:16,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2022-01-18 16:22:16,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788825211] [2022-01-18 16:22:16,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:16,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 16:22:16,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:16,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 16:22:16,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-01-18 16:22:16,744 INFO L87 Difference]: Start difference. First operand 557 states and 1235 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:17,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:17,289 INFO L93 Difference]: Finished difference Result 1295 states and 2746 transitions. [2022-01-18 16:22:17,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 16:22:17,289 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:22:17,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:17,292 INFO L225 Difference]: With dead ends: 1295 [2022-01-18 16:22:17,292 INFO L226 Difference]: Without dead ends: 1081 [2022-01-18 16:22:17,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:22:17,293 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 245 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:17,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 725 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 684 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-01-18 16:22:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2022-01-18 16:22:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 599. [2022-01-18 16:22:17,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.222408026755853) internal successors, (1329), 598 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1329 transitions. [2022-01-18 16:22:17,307 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1329 transitions. Word has length 27 [2022-01-18 16:22:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:17,307 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1329 transitions. [2022-01-18 16:22:17,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1329 transitions. [2022-01-18 16:22:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:22:17,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:17,308 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:17,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:17,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:17,524 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:17,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:17,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1812458454, now seen corresponding path program 17 times [2022-01-18 16:22:17,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:17,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670625689] [2022-01-18 16:22:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:17,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:17,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:17,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670625689] [2022-01-18 16:22:17,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670625689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:17,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837052828] [2022-01-18 16:22:17,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:22:17,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:17,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:17,674 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) [2022-01-18 16:22:17,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 16:22:17,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:22:17,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:17,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:22:17,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:17,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:17,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:17,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:17,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:17,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:17,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:17,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:17,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:17,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:17,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:17,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:17,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:17,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:17,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:17,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 20 [2022-01-18 16:22:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:17,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:18,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:18,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:18,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 144 [2022-01-18 16:22:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:18,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837052828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:18,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:18,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-01-18 16:22:18,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024233285] [2022-01-18 16:22:18,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:18,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:22:18,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:18,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:22:18,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:22:18,487 INFO L87 Difference]: Start difference. First operand 599 states and 1329 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:19,919 INFO L93 Difference]: Finished difference Result 1349 states and 2863 transitions. [2022-01-18 16:22:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 16:22:19,920 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:22:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:19,923 INFO L225 Difference]: With dead ends: 1349 [2022-01-18 16:22:19,923 INFO L226 Difference]: Without dead ends: 1184 [2022-01-18 16:22:19,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=758, Invalid=3148, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 16:22:19,924 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 274 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:19,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 783 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 547 Invalid, 0 Unknown, 199 Unchecked, 0.3s Time] [2022-01-18 16:22:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-01-18 16:22:19,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 724. [2022-01-18 16:22:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.2378976486860305) internal successors, (1618), 723 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1618 transitions. [2022-01-18 16:22:19,935 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1618 transitions. Word has length 27 [2022-01-18 16:22:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:19,935 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 1618 transitions. [2022-01-18 16:22:19,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1618 transitions. [2022-01-18 16:22:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:22:19,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:19,936 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:19,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:20,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:20,151 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:20,152 INFO L85 PathProgramCache]: Analyzing trace with hash 982353754, now seen corresponding path program 18 times [2022-01-18 16:22:20,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:20,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090068132] [2022-01-18 16:22:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:20,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:20,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:20,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090068132] [2022-01-18 16:22:20,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090068132] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:20,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490272463] [2022-01-18 16:22:20,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:22:20,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:20,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:20,294 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) [2022-01-18 16:22:20,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 16:22:20,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:22:20,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:20,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:22:20,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:20,532 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-18 16:22:20,532 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 71 treesize of output 29 [2022-01-18 16:22:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:20,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:20,874 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:22:20,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-01-18 16:22:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:21,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490272463] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:21,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:21,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 16:22:21,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843816642] [2022-01-18 16:22:21,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:21,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 16:22:21,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:21,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 16:22:21,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-01-18 16:22:21,245 INFO L87 Difference]: Start difference. First operand 724 states and 1618 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:21,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:21,580 INFO L93 Difference]: Finished difference Result 1075 states and 2357 transitions. [2022-01-18 16:22:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 16:22:21,580 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:22:21,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:21,583 INFO L225 Difference]: With dead ends: 1075 [2022-01-18 16:22:21,583 INFO L226 Difference]: Without dead ends: 1045 [2022-01-18 16:22:21,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:22:21,583 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 171 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:21,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 478 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:22:21,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-01-18 16:22:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 729. [2022-01-18 16:22:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.23489010989011) internal successors, (1627), 728 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1627 transitions. [2022-01-18 16:22:21,594 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1627 transitions. Word has length 27 [2022-01-18 16:22:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:21,594 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 1627 transitions. [2022-01-18 16:22:21,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1627 transitions. [2022-01-18 16:22:21,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:22:21,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:21,595 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:21,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:21,809 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,SelfDestructingSolverStorable23 [2022-01-18 16:22:21,810 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash 218353775, now seen corresponding path program 19 times [2022-01-18 16:22:21,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:21,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226274803] [2022-01-18 16:22:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:21,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:21,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:21,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226274803] [2022-01-18 16:22:21,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226274803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:21,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252704313] [2022-01-18 16:22:21,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:22:21,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:21,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:21,846 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) [2022-01-18 16:22:21,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 16:22:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:21,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:22:21,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:21,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:21,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252704313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:21,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:21,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-18 16:22:21,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219273699] [2022-01-18 16:22:21,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:21,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 16:22:21,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:21,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 16:22:21,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:22:21,952 INFO L87 Difference]: Start difference. First operand 729 states and 1627 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:21,986 INFO L93 Difference]: Finished difference Result 1113 states and 2488 transitions. [2022-01-18 16:22:21,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 16:22:21,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 16:22:21,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:21,990 INFO L225 Difference]: With dead ends: 1113 [2022-01-18 16:22:21,990 INFO L226 Difference]: Without dead ends: 1108 [2022-01-18 16:22:21,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:22:21,990 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:21,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 69 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:22:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-01-18 16:22:22,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 920. [2022-01-18 16:22:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.2807399347116433) internal successors, (2096), 919 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2096 transitions. [2022-01-18 16:22:22,008 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2096 transitions. Word has length 28 [2022-01-18 16:22:22,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:22,008 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 2096 transitions. [2022-01-18 16:22:22,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2096 transitions. [2022-01-18 16:22:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:22:22,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:22,010 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:22,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:22,223 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,SelfDestructingSolverStorable24 [2022-01-18 16:22:22,223 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:22,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:22,224 INFO L85 PathProgramCache]: Analyzing trace with hash -847195769, now seen corresponding path program 20 times [2022-01-18 16:22:22,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:22,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207720383] [2022-01-18 16:22:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:22,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:22,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:22,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207720383] [2022-01-18 16:22:22,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207720383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:22,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353175338] [2022-01-18 16:22:22,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:22:22,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:22,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:22,360 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) [2022-01-18 16:22:22,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 16:22:22,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:22:22,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:22,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:22:22,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:22,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:22,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:22,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:22,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:22,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:22,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:22,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:22,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:22,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:22,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:22,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:22,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:22,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:22,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-01-18 16:22:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:22,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:23,080 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:22:23,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-01-18 16:22:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:23,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353175338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:23,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:23,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 16:22:23,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269169398] [2022-01-18 16:22:23,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:23,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 16:22:23,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 16:22:23,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:22:23,365 INFO L87 Difference]: Start difference. First operand 920 states and 2096 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:23,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:23,667 INFO L93 Difference]: Finished difference Result 1395 states and 3100 transitions. [2022-01-18 16:22:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 16:22:23,667 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 16:22:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:23,671 INFO L225 Difference]: With dead ends: 1395 [2022-01-18 16:22:23,671 INFO L226 Difference]: Without dead ends: 1365 [2022-01-18 16:22:23,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:22:23,672 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 143 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:23,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 391 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 262 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2022-01-18 16:22:23,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2022-01-18 16:22:23,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 890. [2022-01-18 16:22:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.280089988751406) internal successors, (2027), 889 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2027 transitions. [2022-01-18 16:22:23,685 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2027 transitions. Word has length 30 [2022-01-18 16:22:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:23,685 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 2027 transitions. [2022-01-18 16:22:23,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2027 transitions. [2022-01-18 16:22:23,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:22:23,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:23,686 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:23,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:23,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 16:22:23,899 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:23,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1977486249, now seen corresponding path program 21 times [2022-01-18 16:22:23,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:23,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036345011] [2022-01-18 16:22:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:23,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:24,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:24,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036345011] [2022-01-18 16:22:24,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036345011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:24,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279911238] [2022-01-18 16:22:24,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:22:24,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:24,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:24,052 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) [2022-01-18 16:22:24,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 16:22:24,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 16:22:24,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:24,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:22:24,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:24,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:24,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:24,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:24,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:24,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:24,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:24,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:24,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:24,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:24,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:24,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:24,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:24,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:24,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 29 [2022-01-18 16:22:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:24,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:24,788 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:22:24,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 188 [2022-01-18 16:22:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:25,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279911238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:25,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:25,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 16:22:25,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602096528] [2022-01-18 16:22:25,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:25,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:22:25,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:25,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:22:25,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:22:25,155 INFO L87 Difference]: Start difference. First operand 890 states and 2027 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 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) [2022-01-18 16:22:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:25,443 INFO L93 Difference]: Finished difference Result 1330 states and 2969 transitions. [2022-01-18 16:22:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 16:22:25,444 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 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 30 [2022-01-18 16:22:25,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:25,447 INFO L225 Difference]: With dead ends: 1330 [2022-01-18 16:22:25,447 INFO L226 Difference]: Without dead ends: 1308 [2022-01-18 16:22:25,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:22:25,448 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 131 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:25,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 465 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 258 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2022-01-18 16:22:25,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-01-18 16:22:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 965. [2022-01-18 16:22:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 2.3215767634854774) internal successors, (2238), 964 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 2238 transitions. [2022-01-18 16:22:25,461 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 2238 transitions. Word has length 30 [2022-01-18 16:22:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:25,461 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 2238 transitions. [2022-01-18 16:22:25,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 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) [2022-01-18 16:22:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 2238 transitions. [2022-01-18 16:22:25,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:22:25,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:25,462 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:25,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:25,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:25,678 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:25,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:25,678 INFO L85 PathProgramCache]: Analyzing trace with hash 919637303, now seen corresponding path program 22 times [2022-01-18 16:22:25,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:25,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746343625] [2022-01-18 16:22:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:25,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:25,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:25,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746343625] [2022-01-18 16:22:25,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746343625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:25,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884298999] [2022-01-18 16:22:25,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:22:25,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:25,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:25,814 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) [2022-01-18 16:22:25,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 16:22:25,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:22:25,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:25,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:22:25,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:26,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:26,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:26,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:26,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:26,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:26,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:26,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:26,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:26,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-01-18 16:22:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:26,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:26,512 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:22:26,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-01-18 16:22:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:26,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884298999] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:26,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:26,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 16:22:26,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174393237] [2022-01-18 16:22:26,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:26,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:22:26,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:26,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:22:26,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:22:26,925 INFO L87 Difference]: Start difference. First operand 965 states and 2238 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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) [2022-01-18 16:22:27,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:27,346 INFO L93 Difference]: Finished difference Result 1623 states and 3666 transitions. [2022-01-18 16:22:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 16:22:27,346 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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 30 [2022-01-18 16:22:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:27,351 INFO L225 Difference]: With dead ends: 1623 [2022-01-18 16:22:27,351 INFO L226 Difference]: Without dead ends: 1549 [2022-01-18 16:22:27,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:22:27,351 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 149 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:27,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 507 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 348 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-01-18 16:22:27,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2022-01-18 16:22:27,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 938. [2022-01-18 16:22:27,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 2.312700106723586) internal successors, (2167), 937 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:27,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2167 transitions. [2022-01-18 16:22:27,365 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2167 transitions. Word has length 30 [2022-01-18 16:22:27,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:27,365 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 2167 transitions. [2022-01-18 16:22:27,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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) [2022-01-18 16:22:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2167 transitions. [2022-01-18 16:22:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:22:27,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:27,366 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:27,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:27,583 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,SelfDestructingSolverStorable27 [2022-01-18 16:22:27,583 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:27,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:27,584 INFO L85 PathProgramCache]: Analyzing trace with hash 130006983, now seen corresponding path program 23 times [2022-01-18 16:22:27,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:27,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500616381] [2022-01-18 16:22:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:27,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:27,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:27,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500616381] [2022-01-18 16:22:27,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500616381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:27,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311292197] [2022-01-18 16:22:27,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:22:27,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:27,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:27,730 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) [2022-01-18 16:22:27,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 16:22:27,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 16:22:27,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:27,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:22:27,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:28,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:28,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:28,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:28,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:28,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:28,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:28,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:28,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:28,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-01-18 16:22:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:28,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:28,415 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:22:28,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-01-18 16:22:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:28,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311292197] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:28,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:28,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 16:22:28,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552728532] [2022-01-18 16:22:28,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:28,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 16:22:28,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:28,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 16:22:28,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:22:28,803 INFO L87 Difference]: Start difference. First operand 938 states and 2167 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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) [2022-01-18 16:22:29,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:29,241 INFO L93 Difference]: Finished difference Result 1547 states and 3470 transitions. [2022-01-18 16:22:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:22:29,241 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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 30 [2022-01-18 16:22:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:29,245 INFO L225 Difference]: With dead ends: 1547 [2022-01-18 16:22:29,245 INFO L226 Difference]: Without dead ends: 1487 [2022-01-18 16:22:29,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:22:29,246 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 192 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:29,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 430 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 240 Invalid, 0 Unknown, 126 Unchecked, 0.1s Time] [2022-01-18 16:22:29,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2022-01-18 16:22:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 892. [2022-01-18 16:22:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 2.313131313131313) internal successors, (2061), 891 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2061 transitions. [2022-01-18 16:22:29,259 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2061 transitions. Word has length 30 [2022-01-18 16:22:29,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:29,259 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 2061 transitions. [2022-01-18 16:22:29,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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) [2022-01-18 16:22:29,259 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2061 transitions. [2022-01-18 16:22:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:22:29,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:29,260 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:29,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:29,476 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,SelfDestructingSolverStorable28 [2022-01-18 16:22:29,476 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:29,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:29,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2076351950, now seen corresponding path program 24 times [2022-01-18 16:22:29,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:29,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444667870] [2022-01-18 16:22:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:29,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:29,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:29,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444667870] [2022-01-18 16:22:29,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444667870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:29,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804321544] [2022-01-18 16:22:29,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:22:29,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:29,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:29,641 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) [2022-01-18 16:22:29,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 16:22:29,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:22:29,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:29,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:22:29,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:30,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:30,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:30,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:30,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:30,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-01-18 16:22:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:30,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:30,603 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:22:30,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:22:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:31,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804321544] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:31,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:31,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-01-18 16:22:31,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718684018] [2022-01-18 16:22:31,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:31,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:22:31,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:31,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:22:31,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:22:31,087 INFO L87 Difference]: Start difference. First operand 892 states and 2061 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:32,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:32,074 INFO L93 Difference]: Finished difference Result 2169 states and 4810 transitions. [2022-01-18 16:22:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:22:32,075 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 16:22:32,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:32,080 INFO L225 Difference]: With dead ends: 2169 [2022-01-18 16:22:32,080 INFO L226 Difference]: Without dead ends: 2112 [2022-01-18 16:22:32,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 16:22:32,082 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 252 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:32,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 696 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 525 Invalid, 0 Unknown, 129 Unchecked, 0.3s Time] [2022-01-18 16:22:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2022-01-18 16:22:32,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1058. [2022-01-18 16:22:32,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 2.3103122043519395) internal successors, (2442), 1057 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 2442 transitions. [2022-01-18 16:22:32,098 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 2442 transitions. Word has length 31 [2022-01-18 16:22:32,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:32,098 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 2442 transitions. [2022-01-18 16:22:32,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:32,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 2442 transitions. [2022-01-18 16:22:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:22:32,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:32,099 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:32,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:32,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:32,314 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:32,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1093419102, now seen corresponding path program 25 times [2022-01-18 16:22:32,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:32,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121284359] [2022-01-18 16:22:32,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:32,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:32,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:32,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121284359] [2022-01-18 16:22:32,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121284359] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:32,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927470993] [2022-01-18 16:22:32,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:22:32,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:32,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:32,501 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) [2022-01-18 16:22:32,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 16:22:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:32,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:22:32,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:32,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:32,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:32,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:32,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:32,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:32,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-01-18 16:22:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:32,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:33,459 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:22:33,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:22:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:34,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927470993] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:34,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:34,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 30 [2022-01-18 16:22:34,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874155361] [2022-01-18 16:22:34,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:34,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:22:34,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:34,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:22:34,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:22:34,127 INFO L87 Difference]: Start difference. First operand 1058 states and 2442 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:35,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:35,265 INFO L93 Difference]: Finished difference Result 2806 states and 6196 transitions. [2022-01-18 16:22:35,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:22:35,265 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 16:22:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:35,270 INFO L225 Difference]: With dead ends: 2806 [2022-01-18 16:22:35,270 INFO L226 Difference]: Without dead ends: 2425 [2022-01-18 16:22:35,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=535, Invalid=2657, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 16:22:35,271 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 368 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:35,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 995 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 962 Invalid, 0 Unknown, 84 Unchecked, 0.4s Time] [2022-01-18 16:22:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-01-18 16:22:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1226. [2022-01-18 16:22:35,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.2946938775510204) internal successors, (2811), 1225 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2811 transitions. [2022-01-18 16:22:35,289 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2811 transitions. Word has length 31 [2022-01-18 16:22:35,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:35,289 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 2811 transitions. [2022-01-18 16:22:35,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:35,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2811 transitions. [2022-01-18 16:22:35,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:22:35,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:35,291 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:35,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:35,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:35,503 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash 31141282, now seen corresponding path program 26 times [2022-01-18 16:22:35,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:35,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743772210] [2022-01-18 16:22:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:35,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:35,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:35,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743772210] [2022-01-18 16:22:35,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743772210] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:35,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171485823] [2022-01-18 16:22:35,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:22:35,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:35,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:35,675 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) [2022-01-18 16:22:35,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 16:22:35,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:22:35,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:35,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:22:35,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:36,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:36,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:36,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:36,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:36,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:36,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-01-18 16:22:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:36,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:36,685 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:22:36,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:22:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:37,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171485823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:37,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:37,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-01-18 16:22:37,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350732278] [2022-01-18 16:22:37,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:37,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:22:37,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:37,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:22:37,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:22:37,037 INFO L87 Difference]: Start difference. First operand 1226 states and 2811 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:37,766 INFO L93 Difference]: Finished difference Result 2441 states and 5507 transitions. [2022-01-18 16:22:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:22:37,766 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 16:22:37,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:37,770 INFO L225 Difference]: With dead ends: 2441 [2022-01-18 16:22:37,770 INFO L226 Difference]: Without dead ends: 2260 [2022-01-18 16:22:37,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=488, Invalid=2268, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:22:37,771 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 256 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:37,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 617 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 464 Invalid, 0 Unknown, 164 Unchecked, 0.2s Time] [2022-01-18 16:22:37,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-01-18 16:22:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 788. [2022-01-18 16:22:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.1880559085133418) internal successors, (1722), 787 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1722 transitions. [2022-01-18 16:22:37,787 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1722 transitions. Word has length 31 [2022-01-18 16:22:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:37,787 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1722 transitions. [2022-01-18 16:22:37,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1722 transitions. [2022-01-18 16:22:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:22:37,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:37,788 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:37,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 16:22:37,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:37,994 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:37,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:37,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1216036466, now seen corresponding path program 27 times [2022-01-18 16:22:37,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:37,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955172748] [2022-01-18 16:22:37,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:37,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:38,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:38,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955172748] [2022-01-18 16:22:38,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955172748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:38,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771071670] [2022-01-18 16:22:38,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:22:38,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:38,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:38,174 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) [2022-01-18 16:22:38,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 16:22:38,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 16:22:38,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:38,195 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:22:38,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:38,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:38,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:38,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:38,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:38,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-01-18 16:22:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:38,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:39,138 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:22:39,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:22:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:39,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771071670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:39,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:39,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-01-18 16:22:39,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737074133] [2022-01-18 16:22:39,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:39,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:22:39,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:39,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:22:39,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:22:39,737 INFO L87 Difference]: Start difference. First operand 788 states and 1722 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:40,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:40,633 INFO L93 Difference]: Finished difference Result 1940 states and 4106 transitions. [2022-01-18 16:22:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:22:40,634 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 16:22:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:40,636 INFO L225 Difference]: With dead ends: 1940 [2022-01-18 16:22:40,637 INFO L226 Difference]: Without dead ends: 1621 [2022-01-18 16:22:40,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=432, Invalid=2220, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 16:22:40,637 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 370 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:40,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 974 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 882 Invalid, 0 Unknown, 58 Unchecked, 0.4s Time] [2022-01-18 16:22:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-01-18 16:22:40,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 964. [2022-01-18 16:22:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 2.2242990654205608) internal successors, (2142), 963 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 2142 transitions. [2022-01-18 16:22:40,650 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 2142 transitions. Word has length 31 [2022-01-18 16:22:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:40,650 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 2142 transitions. [2022-01-18 16:22:40,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 2142 transitions. [2022-01-18 16:22:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:22:40,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:40,651 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:40,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 16:22:40,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:40,867 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:40,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1954370446, now seen corresponding path program 28 times [2022-01-18 16:22:40,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:40,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478173443] [2022-01-18 16:22:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:40,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:41,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:41,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478173443] [2022-01-18 16:22:41,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478173443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:41,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075059431] [2022-01-18 16:22:41,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:22:41,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:41,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:41,049 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) [2022-01-18 16:22:41,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 16:22:41,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:22:41,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:41,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:22:41,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:41,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:41,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:41,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:41,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:41,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-01-18 16:22:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:41,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:42,046 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:22:42,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:22:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:42,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075059431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:42,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:42,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-18 16:22:42,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869291123] [2022-01-18 16:22:42,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:42,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 16:22:42,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:42,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 16:22:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:22:42,540 INFO L87 Difference]: Start difference. First operand 964 states and 2142 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:43,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:43,584 INFO L93 Difference]: Finished difference Result 2244 states and 4890 transitions. [2022-01-18 16:22:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:22:43,585 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 16:22:43,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:43,588 INFO L225 Difference]: With dead ends: 2244 [2022-01-18 16:22:43,588 INFO L226 Difference]: Without dead ends: 2003 [2022-01-18 16:22:43,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=780, Invalid=3642, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 16:22:43,589 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 362 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:43,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 722 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 614 Invalid, 0 Unknown, 165 Unchecked, 0.3s Time] [2022-01-18 16:22:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-01-18 16:22:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 578. [2022-01-18 16:22:43,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 2.197573656845754) internal successors, (1268), 577 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:43,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1268 transitions. [2022-01-18 16:22:43,600 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1268 transitions. Word has length 31 [2022-01-18 16:22:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:43,600 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1268 transitions. [2022-01-18 16:22:43,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1268 transitions. [2022-01-18 16:22:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:22:43,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:43,601 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:43,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 16:22:43,814 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,SelfDestructingSolverStorable33 [2022-01-18 16:22:43,814 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:43,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:43,815 INFO L85 PathProgramCache]: Analyzing trace with hash -663106590, now seen corresponding path program 29 times [2022-01-18 16:22:43,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:43,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409220391] [2022-01-18 16:22:43,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:43,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:44,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:44,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409220391] [2022-01-18 16:22:44,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409220391] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:44,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036985331] [2022-01-18 16:22:44,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:22:44,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:44,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:44,034 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) [2022-01-18 16:22:44,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 16:22:44,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 16:22:44,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:44,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 16:22:44,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:44,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 32 [2022-01-18 16:22:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:44,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:44,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:22:44,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 208 [2022-01-18 16:22:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:45,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036985331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:45,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:45,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-01-18 16:22:45,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034104094] [2022-01-18 16:22:45,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:45,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:22:45,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:45,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:22:45,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:22:45,071 INFO L87 Difference]: Start difference. First operand 578 states and 1268 transitions. Second operand has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:45,269 INFO L93 Difference]: Finished difference Result 737 states and 1571 transitions. [2022-01-18 16:22:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 16:22:45,270 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 16:22:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:45,271 INFO L225 Difference]: With dead ends: 737 [2022-01-18 16:22:45,271 INFO L226 Difference]: Without dead ends: 726 [2022-01-18 16:22:45,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:22:45,271 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 112 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:45,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 635 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 182 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-01-18 16:22:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-01-18 16:22:45,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 657. [2022-01-18 16:22:45,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.182926829268293) internal successors, (1432), 656 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1432 transitions. [2022-01-18 16:22:45,278 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1432 transitions. Word has length 31 [2022-01-18 16:22:45,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:45,278 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1432 transitions. [2022-01-18 16:22:45,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:45,278 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1432 transitions. [2022-01-18 16:22:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:22:45,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:45,279 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:45,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:45,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:45,480 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1342373102, now seen corresponding path program 30 times [2022-01-18 16:22:45,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:45,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007767927] [2022-01-18 16:22:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:45,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:45,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:45,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007767927] [2022-01-18 16:22:45,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007767927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:45,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096745854] [2022-01-18 16:22:45,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:22:45,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:45,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:45,689 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) [2022-01-18 16:22:45,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 16:22:45,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 16:22:45,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:45,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 16:22:45,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:46,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:46,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:46,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:46,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:46,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:46,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:46,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:46,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:46,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:46,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:46,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:46,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:46,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:46,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:46,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:46,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:46,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 34 [2022-01-18 16:22:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:46,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:46,698 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:22:46,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:22:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:47,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096745854] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:47,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:47,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-01-18 16:22:47,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082740849] [2022-01-18 16:22:47,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:47,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:22:47,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:47,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:22:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:22:47,198 INFO L87 Difference]: Start difference. First operand 657 states and 1432 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:48,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:48,203 INFO L93 Difference]: Finished difference Result 1434 states and 3086 transitions. [2022-01-18 16:22:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:22:48,203 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 16:22:48,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:48,205 INFO L225 Difference]: With dead ends: 1434 [2022-01-18 16:22:48,206 INFO L226 Difference]: Without dead ends: 1387 [2022-01-18 16:22:48,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=708, Invalid=2832, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 16:22:48,206 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 191 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:48,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 959 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 606 Invalid, 0 Unknown, 241 Unchecked, 0.3s Time] [2022-01-18 16:22:48,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-01-18 16:22:48,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 592. [2022-01-18 16:22:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 2.179357021996616) internal successors, (1288), 591 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1288 transitions. [2022-01-18 16:22:48,215 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1288 transitions. Word has length 31 [2022-01-18 16:22:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:48,215 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 1288 transitions. [2022-01-18 16:22:48,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:48,215 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1288 transitions. [2022-01-18 16:22:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:22:48,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:48,216 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:48,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 16:22:48,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:48,416 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:48,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:48,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1725856206, now seen corresponding path program 31 times [2022-01-18 16:22:48,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:48,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139682559] [2022-01-18 16:22:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:48,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:22:48,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:48,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139682559] [2022-01-18 16:22:48,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139682559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:48,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632888824] [2022-01-18 16:22:48,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:22:48,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:48,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:48,606 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) [2022-01-18 16:22:48,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 16:22:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:48,626 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:22:48,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:48,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:48,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:48,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:48,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:48,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:48,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:48,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:48,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:48,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:48,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:48,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:48,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:48,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:48,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:48,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:48,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-01-18 16:22:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:49,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:49,538 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:22:49,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:22:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:50,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632888824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:50,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:50,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-01-18 16:22:50,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791075549] [2022-01-18 16:22:50,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:50,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:22:50,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:50,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:22:50,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:22:50,261 INFO L87 Difference]: Start difference. First operand 592 states and 1288 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-01-18 16:22:51,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:51,348 INFO L93 Difference]: Finished difference Result 2141 states and 4533 transitions. [2022-01-18 16:22:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:22:51,349 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 31 [2022-01-18 16:22:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:51,351 INFO L225 Difference]: With dead ends: 2141 [2022-01-18 16:22:51,351 INFO L226 Difference]: Without dead ends: 1679 [2022-01-18 16:22:51,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=624, Invalid=2916, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 16:22:51,352 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 435 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:51,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 848 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 760 Invalid, 0 Unknown, 191 Unchecked, 0.3s Time] [2022-01-18 16:22:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2022-01-18 16:22:51,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 666. [2022-01-18 16:22:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.186466165413534) internal successors, (1454), 665 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1454 transitions. [2022-01-18 16:22:51,362 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1454 transitions. Word has length 31 [2022-01-18 16:22:51,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:51,362 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1454 transitions. [2022-01-18 16:22:51,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-01-18 16:22:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1454 transitions. [2022-01-18 16:22:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:22:51,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:51,363 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:51,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 16:22:51,568 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,SelfDestructingSolverStorable36 [2022-01-18 16:22:51,568 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash -434592350, now seen corresponding path program 32 times [2022-01-18 16:22:51,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:51,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107610140] [2022-01-18 16:22:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:51,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:51,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:51,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107610140] [2022-01-18 16:22:51,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107610140] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:51,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873385357] [2022-01-18 16:22:51,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:22:51,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:51,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:51,749 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) [2022-01-18 16:22:51,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 16:22:51,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:22:51,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:51,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:22:51,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:52,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:52,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:52,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:52,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:52,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:52,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:52,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:52,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:52,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:52,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:52,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:52,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:52,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:52,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:52,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:52,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-01-18 16:22:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:52,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:52,718 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:22:52,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:22:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:53,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873385357] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:53,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:53,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-01-18 16:22:53,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953208814] [2022-01-18 16:22:53,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:53,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:22:53,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:53,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:22:53,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:22:53,274 INFO L87 Difference]: Start difference. First operand 666 states and 1454 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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) [2022-01-18 16:22:53,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:53,957 INFO L93 Difference]: Finished difference Result 1451 states and 3127 transitions. [2022-01-18 16:22:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:22:53,958 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 31 [2022-01-18 16:22:53,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:53,960 INFO L225 Difference]: With dead ends: 1451 [2022-01-18 16:22:53,960 INFO L226 Difference]: Without dead ends: 1396 [2022-01-18 16:22:53,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=503, Invalid=2359, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 16:22:53,960 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 222 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:53,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 658 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 444 Invalid, 0 Unknown, 208 Unchecked, 0.2s Time] [2022-01-18 16:22:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-01-18 16:22:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 691. [2022-01-18 16:22:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 2.1782608695652175) internal successors, (1503), 690 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:53,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1503 transitions. [2022-01-18 16:22:53,970 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1503 transitions. Word has length 31 [2022-01-18 16:22:53,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:53,970 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 1503 transitions. [2022-01-18 16:22:53,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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) [2022-01-18 16:22:53,970 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1503 transitions. [2022-01-18 16:22:53,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:22:53,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:53,971 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:53,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:54,186 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,SelfDestructingSolverStorable37 [2022-01-18 16:22:54,187 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:54,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:54,187 INFO L85 PathProgramCache]: Analyzing trace with hash 23229282, now seen corresponding path program 33 times [2022-01-18 16:22:54,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:54,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717680561] [2022-01-18 16:22:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:54,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:54,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:54,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717680561] [2022-01-18 16:22:54,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717680561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:54,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671210652] [2022-01-18 16:22:54,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:22:54,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:54,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:54,378 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) [2022-01-18 16:22:54,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 16:22:54,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 16:22:54,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:54,402 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:22:54,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:54,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:54,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:54,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:54,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:54,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:54,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:54,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:54,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:54,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:54,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:54,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:54,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-01-18 16:22:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:54,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:55,296 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:22:55,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:22:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:55,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671210652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:55,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:55,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 28 [2022-01-18 16:22:55,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288512730] [2022-01-18 16:22:55,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:55,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:22:55,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:55,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:22:55,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:22:55,706 INFO L87 Difference]: Start difference. First operand 691 states and 1503 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) 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) [2022-01-18 16:22:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:56,519 INFO L93 Difference]: Finished difference Result 1827 states and 3810 transitions. [2022-01-18 16:22:56,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 16:22:56,520 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) 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 31 [2022-01-18 16:22:56,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:56,522 INFO L225 Difference]: With dead ends: 1827 [2022-01-18 16:22:56,522 INFO L226 Difference]: Without dead ends: 1522 [2022-01-18 16:22:56,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:22:56,522 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 392 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:56,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 868 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 801 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2022-01-18 16:22:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-01-18 16:22:56,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 826. [2022-01-18 16:22:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.1866666666666665) internal successors, (1804), 825 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1804 transitions. [2022-01-18 16:22:56,533 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1804 transitions. Word has length 31 [2022-01-18 16:22:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:56,534 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1804 transitions. [2022-01-18 16:22:56,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) 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) [2022-01-18 16:22:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1804 transitions. [2022-01-18 16:22:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:22:56,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:56,535 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:56,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:56,750 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,SelfDestructingSolverStorable38 [2022-01-18 16:22:56,750 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:56,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:56,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1937419986, now seen corresponding path program 34 times [2022-01-18 16:22:56,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:56,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410001855] [2022-01-18 16:22:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:56,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:56,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:56,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410001855] [2022-01-18 16:22:56,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410001855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:56,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425229471] [2022-01-18 16:22:56,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:22:56,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:56,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:56,934 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) [2022-01-18 16:22:56,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 16:22:56,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:22:56,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:56,955 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:22:56,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:57,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:57,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:57,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:57,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:57,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:57,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:57,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:57,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:57,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:57,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:57,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:57,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:57,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:57,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:57,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:57,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-01-18 16:22:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:57,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:57,858 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:22:57,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:22:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:58,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425229471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:58,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:58,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 28 [2022-01-18 16:22:58,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124521111] [2022-01-18 16:22:58,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:58,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:22:58,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:58,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:22:58,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:22:58,506 INFO L87 Difference]: Start difference. First operand 826 states and 1804 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) 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) [2022-01-18 16:22:59,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:59,241 INFO L93 Difference]: Finished difference Result 1711 states and 3652 transitions. [2022-01-18 16:22:59,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:22:59,241 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) 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 31 [2022-01-18 16:22:59,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:59,244 INFO L225 Difference]: With dead ends: 1711 [2022-01-18 16:22:59,244 INFO L226 Difference]: Without dead ends: 1627 [2022-01-18 16:22:59,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=401, Invalid=1951, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:22:59,244 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 249 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:59,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 774 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 620 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-01-18 16:22:59,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2022-01-18 16:22:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 814. [2022-01-18 16:22:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.1894218942189423) internal successors, (1780), 813 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:59,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1780 transitions. [2022-01-18 16:22:59,255 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1780 transitions. Word has length 31 [2022-01-18 16:22:59,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:59,255 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1780 transitions. [2022-01-18 16:22:59,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) 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) [2022-01-18 16:22:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1780 transitions. [2022-01-18 16:22:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:22:59,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:59,256 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:59,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:59,471 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,SelfDestructingSolverStorable39 [2022-01-18 16:22:59,471 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:59,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:59,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1855913774, now seen corresponding path program 35 times [2022-01-18 16:22:59,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:59,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419495545] [2022-01-18 16:22:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:59,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:59,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:59,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419495545] [2022-01-18 16:22:59,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419495545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:59,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484837889] [2022-01-18 16:22:59,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:22:59,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:59,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:59,657 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) [2022-01-18 16:22:59,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 16:22:59,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 16:22:59,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:59,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-18 16:22:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:00,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:00,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:00,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:00,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:00,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:00,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:00,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 24 [2022-01-18 16:23:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:00,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:01,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:01,510 INFO L353 Elim1Store]: treesize reduction 46, result has 76.4 percent of original size [2022-01-18 16:23:01,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 88 treesize of output 188 [2022-01-18 16:23:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:02,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484837889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:02,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:02,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2022-01-18 16:23:02,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137763857] [2022-01-18 16:23:02,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:02,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:23:02,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:02,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:23:02,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:23:02,211 INFO L87 Difference]: Start difference. First operand 814 states and 1780 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:05,059 INFO L93 Difference]: Finished difference Result 1153 states and 2507 transitions. [2022-01-18 16:23:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 16:23:05,059 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 16:23:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:05,061 INFO L225 Difference]: With dead ends: 1153 [2022-01-18 16:23:05,061 INFO L226 Difference]: Without dead ends: 1138 [2022-01-18 16:23:05,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=467, Invalid=2185, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 16:23:05,061 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 214 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:05,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 669 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 126 Invalid, 0 Unknown, 311 Unchecked, 0.1s Time] [2022-01-18 16:23:05,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-01-18 16:23:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 910. [2022-01-18 16:23:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 2.2222222222222223) internal successors, (2020), 909 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:05,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 2020 transitions. [2022-01-18 16:23:05,071 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 2020 transitions. Word has length 31 [2022-01-18 16:23:05,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:05,072 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 2020 transitions. [2022-01-18 16:23:05,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:05,072 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 2020 transitions. [2022-01-18 16:23:05,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:23:05,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:05,073 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:05,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:05,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:05,288 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:05,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:05,288 INFO L85 PathProgramCache]: Analyzing trace with hash -481439902, now seen corresponding path program 36 times [2022-01-18 16:23:05,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:05,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861110805] [2022-01-18 16:23:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:05,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:05,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:05,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861110805] [2022-01-18 16:23:05,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861110805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:05,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982587301] [2022-01-18 16:23:05,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:23:05,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:05,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:05,493 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) [2022-01-18 16:23:05,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 16:23:05,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 16:23:05,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:05,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:23:05,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:06,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:06,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:06,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:06,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:06,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:06,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:06,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:06,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:06,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:06,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:06,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:06,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:06,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:06,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:06,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 34 [2022-01-18 16:23:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:06,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:07,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,363 INFO L353 Elim1Store]: treesize reduction 46, result has 76.4 percent of original size [2022-01-18 16:23:07,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 88 treesize of output 188 [2022-01-18 16:23:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:07,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982587301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:07,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:07,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-01-18 16:23:07,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338732547] [2022-01-18 16:23:07,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:07,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:23:07,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:23:07,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:23:07,749 INFO L87 Difference]: Start difference. First operand 910 states and 2020 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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) [2022-01-18 16:23:08,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:08,982 INFO L93 Difference]: Finished difference Result 1248 states and 2716 transitions. [2022-01-18 16:23:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 16:23:08,982 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 31 [2022-01-18 16:23:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:08,984 INFO L225 Difference]: With dead ends: 1248 [2022-01-18 16:23:08,984 INFO L226 Difference]: Without dead ends: 1209 [2022-01-18 16:23:08,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=534, Invalid=2328, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 16:23:08,985 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 221 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:08,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 607 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 120 Invalid, 0 Unknown, 309 Unchecked, 0.1s Time] [2022-01-18 16:23:08,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-01-18 16:23:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 994. [2022-01-18 16:23:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 2.229607250755287) internal successors, (2214), 993 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:08,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 2214 transitions. [2022-01-18 16:23:08,995 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 2214 transitions. Word has length 31 [2022-01-18 16:23:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:08,995 INFO L470 AbstractCegarLoop]: Abstraction has 994 states and 2214 transitions. [2022-01-18 16:23:08,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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) [2022-01-18 16:23:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 2214 transitions. [2022-01-18 16:23:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 16:23:08,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:08,996 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:09,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 16:23:09,212 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,SelfDestructingSolverStorable41 [2022-01-18 16:23:09,212 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:09,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:09,212 INFO L85 PathProgramCache]: Analyzing trace with hash 156759775, now seen corresponding path program 37 times [2022-01-18 16:23:09,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:09,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264018753] [2022-01-18 16:23:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:09,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:09,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:09,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264018753] [2022-01-18 16:23:09,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264018753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:09,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658113292] [2022-01-18 16:23:09,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:23:09,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:09,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:09,384 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) [2022-01-18 16:23:09,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 16:23:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:09,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:23:09,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:09,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:09,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:09,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:09,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-01-18 16:23:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:09,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:10,387 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:23:10,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:23:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:10,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658113292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:10,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:10,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-01-18 16:23:10,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872367840] [2022-01-18 16:23:10,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:10,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:23:10,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:10,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:23:10,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:23:10,962 INFO L87 Difference]: Start difference. First operand 994 states and 2214 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:12,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:12,046 INFO L93 Difference]: Finished difference Result 2543 states and 5462 transitions. [2022-01-18 16:23:12,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:23:12,046 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 16:23:12,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:12,049 INFO L225 Difference]: With dead ends: 2543 [2022-01-18 16:23:12,049 INFO L226 Difference]: Without dead ends: 2235 [2022-01-18 16:23:12,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 16:23:12,050 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 356 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:12,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 963 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 808 Invalid, 0 Unknown, 169 Unchecked, 0.4s Time] [2022-01-18 16:23:12,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2022-01-18 16:23:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1237. [2022-01-18 16:23:12,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 2.26294498381877) internal successors, (2797), 1236 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:12,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 2797 transitions. [2022-01-18 16:23:12,065 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 2797 transitions. Word has length 34 [2022-01-18 16:23:12,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:12,066 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 2797 transitions. [2022-01-18 16:23:12,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:12,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 2797 transitions. [2022-01-18 16:23:12,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 16:23:12,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:12,067 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:12,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 16:23:12,280 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,SelfDestructingSolverStorable42 [2022-01-18 16:23:12,280 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:12,280 INFO L85 PathProgramCache]: Analyzing trace with hash -839039841, now seen corresponding path program 38 times [2022-01-18 16:23:12,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:12,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454337634] [2022-01-18 16:23:12,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:12,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:12,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:12,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454337634] [2022-01-18 16:23:12,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454337634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:12,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837073877] [2022-01-18 16:23:12,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:23:12,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:12,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:12,457 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) [2022-01-18 16:23:12,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 16:23:12,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:23:12,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:12,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:23:12,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:12,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:12,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:12,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:12,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:12,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:12,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:12,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:12,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:12,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:12,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:12,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:12,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:12,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:12,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:12,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-01-18 16:23:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:12,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:13,467 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:23:13,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:23:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 5 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:13,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837073877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:13,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:13,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-01-18 16:23:13,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747582764] [2022-01-18 16:23:13,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:13,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:23:13,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:13,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:23:13,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:23:13,922 INFO L87 Difference]: Start difference. First operand 1237 states and 2797 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:14,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:14,810 INFO L93 Difference]: Finished difference Result 2698 states and 5891 transitions. [2022-01-18 16:23:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:23:14,810 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 16:23:14,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:14,813 INFO L225 Difference]: With dead ends: 2698 [2022-01-18 16:23:14,813 INFO L226 Difference]: Without dead ends: 2373 [2022-01-18 16:23:14,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=1946, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:23:14,813 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 384 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:14,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 1074 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 775 Invalid, 0 Unknown, 267 Unchecked, 0.4s Time] [2022-01-18 16:23:14,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2022-01-18 16:23:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1308. [2022-01-18 16:23:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.2478959449120124) internal successors, (2938), 1307 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2938 transitions. [2022-01-18 16:23:14,828 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2938 transitions. Word has length 34 [2022-01-18 16:23:14,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:14,828 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 2938 transitions. [2022-01-18 16:23:14,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:14,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2938 transitions. [2022-01-18 16:23:14,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 16:23:14,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:14,830 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:14,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:15,030 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,SelfDestructingSolverStorable43 [2022-01-18 16:23:15,030 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:15,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1044819745, now seen corresponding path program 39 times [2022-01-18 16:23:15,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:15,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518621724] [2022-01-18 16:23:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:15,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:15,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:15,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518621724] [2022-01-18 16:23:15,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518621724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:15,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524013694] [2022-01-18 16:23:15,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:23:15,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:15,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:15,223 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) [2022-01-18 16:23:15,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 16:23:15,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 16:23:15,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:15,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:23:15,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:15,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:15,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:15,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:15,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:15,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:15,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:15,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:15,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:15,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:15,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:15,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:15,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:15,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:15,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:15,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-01-18 16:23:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:15,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:16,223 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:23:16,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:23:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:16,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524013694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:16,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:16,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-01-18 16:23:16,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511641250] [2022-01-18 16:23:16,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:16,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:23:16,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:16,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:23:16,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:23:16,790 INFO L87 Difference]: Start difference. First operand 1308 states and 2938 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:17,886 INFO L93 Difference]: Finished difference Result 3651 states and 7798 transitions. [2022-01-18 16:23:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:23:17,886 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 16:23:17,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:17,890 INFO L225 Difference]: With dead ends: 3651 [2022-01-18 16:23:17,890 INFO L226 Difference]: Without dead ends: 3378 [2022-01-18 16:23:17,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=469, Invalid=2287, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:23:17,891 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 346 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:17,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 1211 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 947 Invalid, 0 Unknown, 115 Unchecked, 0.4s Time] [2022-01-18 16:23:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3378 states. [2022-01-18 16:23:17,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3378 to 1870. [2022-01-18 16:23:17,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 2.2659176029962547) internal successors, (4235), 1869 states have internal predecessors, (4235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 4235 transitions. [2022-01-18 16:23:17,916 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 4235 transitions. Word has length 34 [2022-01-18 16:23:17,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:17,916 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 4235 transitions. [2022-01-18 16:23:17,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:17,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 4235 transitions. [2022-01-18 16:23:17,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 16:23:17,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:17,918 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:17,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 16:23:18,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:18,134 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:18,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:18,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1177399239, now seen corresponding path program 40 times [2022-01-18 16:23:18,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:18,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32137063] [2022-01-18 16:23:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:18,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:23:18,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:18,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32137063] [2022-01-18 16:23:18,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32137063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:18,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345926795] [2022-01-18 16:23:18,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:23:18,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:18,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:18,339 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) [2022-01-18 16:23:18,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 16:23:18,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:23:18,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:18,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 16:23:18,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:18,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:18,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:18,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:18,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:18,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:18,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:18,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:18,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:18,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:18,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:18,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:18,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 34 [2022-01-18 16:23:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:23:18,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:19,293 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:23:19,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:23:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:23:19,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345926795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:19,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:19,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-01-18 16:23:19,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321639223] [2022-01-18 16:23:19,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:19,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:23:19,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:23:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:23:19,869 INFO L87 Difference]: Start difference. First operand 1870 states and 4235 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:20,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:20,591 INFO L93 Difference]: Finished difference Result 3091 states and 6858 transitions. [2022-01-18 16:23:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 16:23:20,591 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 16:23:20,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:20,594 INFO L225 Difference]: With dead ends: 3091 [2022-01-18 16:23:20,594 INFO L226 Difference]: Without dead ends: 2986 [2022-01-18 16:23:20,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=456, Invalid=2094, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:23:20,595 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 239 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:20,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 969 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 631 Invalid, 0 Unknown, 373 Unchecked, 0.3s Time] [2022-01-18 16:23:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2022-01-18 16:23:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 1914. [2022-01-18 16:23:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 2.261369576581286) internal successors, (4326), 1913 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 4326 transitions. [2022-01-18 16:23:20,618 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 4326 transitions. Word has length 34 [2022-01-18 16:23:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:20,618 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 4326 transitions. [2022-01-18 16:23:20,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 4326 transitions. [2022-01-18 16:23:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 16:23:20,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:20,620 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:20,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 16:23:20,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:20,835 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash -535331473, now seen corresponding path program 41 times [2022-01-18 16:23:20,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:20,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115172700] [2022-01-18 16:23:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:20,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:21,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:21,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115172700] [2022-01-18 16:23:21,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115172700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:21,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550866649] [2022-01-18 16:23:21,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:23:21,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:21,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:21,036 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) [2022-01-18 16:23:21,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 16:23:21,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 16:23:21,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:21,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:23:21,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:21,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:21,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:21,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:21,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:21,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:21,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:21,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:21,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:21,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:21,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:21,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:21,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-01-18 16:23:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:21,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:22,035 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:23:22,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:23:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 5 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:22,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550866649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:22,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:22,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-01-18 16:23:22,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407868175] [2022-01-18 16:23:22,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:22,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:23:22,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:22,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:23:22,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:23:22,501 INFO L87 Difference]: Start difference. First operand 1914 states and 4326 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:23,499 INFO L93 Difference]: Finished difference Result 3135 states and 6935 transitions. [2022-01-18 16:23:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:23:23,500 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 16:23:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:23,503 INFO L225 Difference]: With dead ends: 3135 [2022-01-18 16:23:23,503 INFO L226 Difference]: Without dead ends: 3045 [2022-01-18 16:23:23,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=627, Invalid=3033, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:23:23,507 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 233 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 550 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:23,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1182 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 683 Invalid, 0 Unknown, 550 Unchecked, 0.3s Time] [2022-01-18 16:23:23,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2022-01-18 16:23:23,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 1941. [2022-01-18 16:23:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.265463917525773) internal successors, (4395), 1940 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 4395 transitions. [2022-01-18 16:23:23,531 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 4395 transitions. Word has length 34 [2022-01-18 16:23:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:23,531 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 4395 transitions. [2022-01-18 16:23:23,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 4395 transitions. [2022-01-18 16:23:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 16:23:23,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:23,533 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:23,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:23,748 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,SelfDestructingSolverStorable46 [2022-01-18 16:23:23,749 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:23,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:23,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1762915409, now seen corresponding path program 42 times [2022-01-18 16:23:23,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:23,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364821774] [2022-01-18 16:23:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:23,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:23,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:23,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364821774] [2022-01-18 16:23:23,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364821774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:23,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360560724] [2022-01-18 16:23:23,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:23:23,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:23,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:23,955 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) [2022-01-18 16:23:23,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 16:23:23,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 16:23:23,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:23:23,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:24,348 INFO L353 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2022-01-18 16:23:24,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 34 [2022-01-18 16:23:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:24,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:24,893 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-01-18 16:23:24,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-01-18 16:23:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:25,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360560724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:25,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:25,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2022-01-18 16:23:25,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461311150] [2022-01-18 16:23:25,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:25,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:23:25,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:25,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:23:25,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:23:25,592 INFO L87 Difference]: Start difference. First operand 1941 states and 4395 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:26,268 INFO L93 Difference]: Finished difference Result 2951 states and 6561 transitions. [2022-01-18 16:23:26,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 16:23:26,268 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 16:23:26,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:26,271 INFO L225 Difference]: With dead ends: 2951 [2022-01-18 16:23:26,271 INFO L226 Difference]: Without dead ends: 2901 [2022-01-18 16:23:26,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=374, Invalid=1788, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 16:23:26,272 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 184 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:26,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 775 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:23:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2022-01-18 16:23:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 1951. [2022-01-18 16:23:26,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 2.263076923076923) internal successors, (4413), 1950 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 4413 transitions. [2022-01-18 16:23:26,296 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 4413 transitions. Word has length 34 [2022-01-18 16:23:26,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:26,296 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 4413 transitions. [2022-01-18 16:23:26,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:26,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 4413 transitions. [2022-01-18 16:23:26,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:23:26,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:26,298 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:26,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:26,515 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,SelfDestructingSolverStorable47 [2022-01-18 16:23:26,515 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:26,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:26,516 INFO L85 PathProgramCache]: Analyzing trace with hash -954800038, now seen corresponding path program 43 times [2022-01-18 16:23:26,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:26,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698689211] [2022-01-18 16:23:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:26,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:26,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:26,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698689211] [2022-01-18 16:23:26,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698689211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:26,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811524030] [2022-01-18 16:23:26,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:23:26,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:26,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:26,721 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) [2022-01-18 16:23:26,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 16:23:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:26,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:23:26,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:27,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:27,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:27,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:27,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:27,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:27,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:27,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:23:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:27,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:28,278 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:23:28,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:23:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:29,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811524030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:29,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:29,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-01-18 16:23:29,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137534020] [2022-01-18 16:23:29,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:29,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:23:29,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:23:29,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:23:29,201 INFO L87 Difference]: Start difference. First operand 1951 states and 4413 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:30,484 INFO L93 Difference]: Finished difference Result 4136 states and 9235 transitions. [2022-01-18 16:23:30,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 16:23:30,484 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:23:30,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:30,489 INFO L225 Difference]: With dead ends: 4136 [2022-01-18 16:23:30,489 INFO L226 Difference]: Without dead ends: 4001 [2022-01-18 16:23:30,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=803, Invalid=4309, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:23:30,490 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 325 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:30,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 727 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 543 Invalid, 0 Unknown, 141 Unchecked, 0.3s Time] [2022-01-18 16:23:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2022-01-18 16:23:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 1878. [2022-01-18 16:23:30,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.240809802876931) internal successors, (4206), 1877 states have internal predecessors, (4206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 4206 transitions. [2022-01-18 16:23:30,519 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 4206 transitions. Word has length 35 [2022-01-18 16:23:30,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:30,520 INFO L470 AbstractCegarLoop]: Abstraction has 1878 states and 4206 transitions. [2022-01-18 16:23:30,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 4206 transitions. [2022-01-18 16:23:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:23:30,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:30,521 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:30,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:30,734 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,SelfDestructingSolverStorable48 [2022-01-18 16:23:30,735 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:30,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:30,735 INFO L85 PathProgramCache]: Analyzing trace with hash 127332090, now seen corresponding path program 44 times [2022-01-18 16:23:30,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:30,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787342034] [2022-01-18 16:23:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:30,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:31,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:31,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787342034] [2022-01-18 16:23:31,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787342034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:31,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974398044] [2022-01-18 16:23:31,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:23:31,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:31,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:31,030 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) [2022-01-18 16:23:31,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:23:31,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:31,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 16:23:31,061 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:23:31,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:31,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:31,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:31,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:31,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:31,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:31,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:31,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:23:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:31,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:32,517 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:23:32,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:23:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:33,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974398044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:33,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:33,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-01-18 16:23:33,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102929841] [2022-01-18 16:23:33,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:33,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:23:33,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:33,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:23:33,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:23:33,393 INFO L87 Difference]: Start difference. First operand 1878 states and 4206 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:34,513 INFO L93 Difference]: Finished difference Result 3758 states and 8289 transitions. [2022-01-18 16:23:34,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:23:34,513 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:23:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:34,517 INFO L225 Difference]: With dead ends: 3758 [2022-01-18 16:23:34,517 INFO L226 Difference]: Without dead ends: 3705 [2022-01-18 16:23:34,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=830, Invalid=3862, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:23:34,518 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 236 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:34,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 994 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 617 Invalid, 0 Unknown, 323 Unchecked, 0.3s Time] [2022-01-18 16:23:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2022-01-18 16:23:34,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 2116. [2022-01-18 16:23:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.2382978723404254) internal successors, (4734), 2115 states have internal predecessors, (4734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 4734 transitions. [2022-01-18 16:23:34,544 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 4734 transitions. Word has length 35 [2022-01-18 16:23:34,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:34,544 INFO L470 AbstractCegarLoop]: Abstraction has 2116 states and 4734 transitions. [2022-01-18 16:23:34,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:34,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 4734 transitions. [2022-01-18 16:23:34,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:23:34,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:34,546 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:34,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:34,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:34,762 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:34,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:34,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1662856346, now seen corresponding path program 45 times [2022-01-18 16:23:34,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:34,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017451880] [2022-01-18 16:23:34,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:34,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:34,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:34,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017451880] [2022-01-18 16:23:34,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017451880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:34,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522277517] [2022-01-18 16:23:34,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:23:34,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:34,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:34,965 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) [2022-01-18 16:23:34,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 16:23:34,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 16:23:34,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:34,989 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:23:34,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:35,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:35,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:35,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:35,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:35,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:35,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:35,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:23:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:35,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:36,386 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:23:36,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:23:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:37,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522277517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:37,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:37,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-01-18 16:23:37,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472244480] [2022-01-18 16:23:37,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:37,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:23:37,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:37,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:23:37,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:23:37,193 INFO L87 Difference]: Start difference. First operand 2116 states and 4734 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:38,725 INFO L93 Difference]: Finished difference Result 4790 states and 10454 transitions. [2022-01-18 16:23:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 16:23:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:23:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:38,731 INFO L225 Difference]: With dead ends: 4790 [2022-01-18 16:23:38,731 INFO L226 Difference]: Without dead ends: 4209 [2022-01-18 16:23:38,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=670, Invalid=3620, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 16:23:38,732 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 471 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:38,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 1288 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1164 Invalid, 0 Unknown, 120 Unchecked, 0.6s Time] [2022-01-18 16:23:38,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2022-01-18 16:23:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 2195. [2022-01-18 16:23:38,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 2.2520510483135827) internal successors, (4941), 2194 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 4941 transitions. [2022-01-18 16:23:38,761 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 4941 transitions. Word has length 35 [2022-01-18 16:23:38,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:38,762 INFO L470 AbstractCegarLoop]: Abstraction has 2195 states and 4941 transitions. [2022-01-18 16:23:38,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:38,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 4941 transitions. [2022-01-18 16:23:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:23:38,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:38,764 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:38,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 16:23:38,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:38,978 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:38,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:38,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1623360970, now seen corresponding path program 46 times [2022-01-18 16:23:38,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:38,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465839749] [2022-01-18 16:23:38,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:38,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:39,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:39,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465839749] [2022-01-18 16:23:39,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465839749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:39,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885659490] [2022-01-18 16:23:39,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:23:39,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:39,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:39,211 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) [2022-01-18 16:23:39,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 16:23:39,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:23:39,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:39,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:23:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:39,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:39,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:39,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:39,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:39,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:39,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:39,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:23:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:39,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:40,674 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:23:40,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:23:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:41,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885659490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:41,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:41,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-01-18 16:23:41,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945624395] [2022-01-18 16:23:41,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:41,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:23:41,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:41,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:23:41,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:23:41,584 INFO L87 Difference]: Start difference. First operand 2195 states and 4941 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:42,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:42,734 INFO L93 Difference]: Finished difference Result 4494 states and 10166 transitions. [2022-01-18 16:23:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 16:23:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:23:42,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:42,740 INFO L225 Difference]: With dead ends: 4494 [2022-01-18 16:23:42,740 INFO L226 Difference]: Without dead ends: 4212 [2022-01-18 16:23:42,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=798, Invalid=3894, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:23:42,741 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 404 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:42,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 958 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 624 Invalid, 0 Unknown, 373 Unchecked, 0.3s Time] [2022-01-18 16:23:42,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4212 states. [2022-01-18 16:23:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4212 to 1459. [2022-01-18 16:23:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 2.174211248285322) internal successors, (3170), 1458 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 3170 transitions. [2022-01-18 16:23:42,764 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 3170 transitions. Word has length 35 [2022-01-18 16:23:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:42,764 INFO L470 AbstractCegarLoop]: Abstraction has 1459 states and 3170 transitions. [2022-01-18 16:23:42,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 3170 transitions. [2022-01-18 16:23:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:23:42,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:42,765 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:42,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:42,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:42,966 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:42,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:42,966 INFO L85 PathProgramCache]: Analyzing trace with hash 395777034, now seen corresponding path program 47 times [2022-01-18 16:23:42,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:42,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173795520] [2022-01-18 16:23:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:42,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:23:43,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173795520] [2022-01-18 16:23:43,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173795520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62882256] [2022-01-18 16:23:43,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:23:43,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:43,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:43,207 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) [2022-01-18 16:23:43,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 16:23:43,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 16:23:43,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:43,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:23:43,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:43,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:43,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:43,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:43,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:43,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:43,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:43,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:23:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:43,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:44,651 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:23:44,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:23:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:45,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62882256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:45,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:45,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-01-18 16:23:45,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595899236] [2022-01-18 16:23:45,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:45,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:23:45,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:45,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:23:45,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:23:45,526 INFO L87 Difference]: Start difference. First operand 1459 states and 3170 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:46,527 INFO L93 Difference]: Finished difference Result 2688 states and 5687 transitions. [2022-01-18 16:23:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:23:46,528 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:23:46,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:46,530 INFO L225 Difference]: With dead ends: 2688 [2022-01-18 16:23:46,530 INFO L226 Difference]: Without dead ends: 2396 [2022-01-18 16:23:46,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=493, Invalid=2369, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 16:23:46,531 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 379 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:46,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 1078 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 994 Invalid, 0 Unknown, 25 Unchecked, 0.5s Time] [2022-01-18 16:23:46,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2022-01-18 16:23:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 1654. [2022-01-18 16:23:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 2.173018753781004) internal successors, (3592), 1653 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 3592 transitions. [2022-01-18 16:23:46,548 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 3592 transitions. Word has length 35 [2022-01-18 16:23:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:46,548 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 3592 transitions. [2022-01-18 16:23:46,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 3592 transitions. [2022-01-18 16:23:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:23:46,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:46,550 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:46,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:46,750 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,SelfDestructingSolverStorable52 [2022-01-18 16:23:46,750 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:46,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:46,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1974496454, now seen corresponding path program 48 times [2022-01-18 16:23:46,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:46,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152654918] [2022-01-18 16:23:46,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:46,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:46,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:46,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152654918] [2022-01-18 16:23:46,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152654918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:46,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92178602] [2022-01-18 16:23:46,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:23:46,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:46,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:46,965 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) [2022-01-18 16:23:46,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 16:23:47,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 16:23:47,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:47,001 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-18 16:23:47,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:47,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:47,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:47,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:47,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:47,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:47,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:47,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 39 [2022-01-18 16:23:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:47,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:48,420 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:23:48,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 114 treesize of output 396 [2022-01-18 16:23:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:49,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92178602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:49,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:49,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-01-18 16:23:49,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571964499] [2022-01-18 16:23:49,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:49,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:23:49,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:49,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:23:49,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:23:49,320 INFO L87 Difference]: Start difference. First operand 1654 states and 3592 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:50,293 INFO L93 Difference]: Finished difference Result 2853 states and 6115 transitions. [2022-01-18 16:23:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 16:23:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:23:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:50,297 INFO L225 Difference]: With dead ends: 2853 [2022-01-18 16:23:50,297 INFO L226 Difference]: Without dead ends: 2769 [2022-01-18 16:23:50,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=525, Invalid=2781, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:23:50,297 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 218 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:50,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 914 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 731 Invalid, 0 Unknown, 131 Unchecked, 0.4s Time] [2022-01-18 16:23:50,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2022-01-18 16:23:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1618. [2022-01-18 16:23:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 2.168212739641311) internal successors, (3506), 1617 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 3506 transitions. [2022-01-18 16:23:50,316 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 3506 transitions. Word has length 35 [2022-01-18 16:23:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:50,316 INFO L470 AbstractCegarLoop]: Abstraction has 1618 states and 3506 transitions. [2022-01-18 16:23:50,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 3506 transitions. [2022-01-18 16:23:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:23:50,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:50,318 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:50,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:50,528 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,SelfDestructingSolverStorable53 [2022-01-18 16:23:50,528 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash 356281658, now seen corresponding path program 49 times [2022-01-18 16:23:50,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:50,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710775733] [2022-01-18 16:23:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:50,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:50,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:50,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710775733] [2022-01-18 16:23:50,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710775733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:50,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969893947] [2022-01-18 16:23:50,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:23:50,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:50,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:50,779 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) [2022-01-18 16:23:50,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 16:23:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:50,802 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:23:50,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:51,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:51,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:51,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:51,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:51,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:51,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:23:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:51,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:52,230 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:23:52,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:23:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:53,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969893947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:53,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:53,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-01-18 16:23:53,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601316178] [2022-01-18 16:23:53,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:53,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:23:53,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:53,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:23:53,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:23:53,150 INFO L87 Difference]: Start difference. First operand 1618 states and 3506 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:53,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:53,955 INFO L93 Difference]: Finished difference Result 2882 states and 6229 transitions. [2022-01-18 16:23:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:23:53,956 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:23:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:53,959 INFO L225 Difference]: With dead ends: 2882 [2022-01-18 16:23:53,959 INFO L226 Difference]: Without dead ends: 2783 [2022-01-18 16:23:53,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=551, Invalid=2871, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 16:23:53,960 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 218 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:53,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 840 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 595 Invalid, 0 Unknown, 204 Unchecked, 0.3s Time] [2022-01-18 16:23:53,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2022-01-18 16:23:53,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 1723. [2022-01-18 16:23:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 2.1759581881533103) internal successors, (3747), 1722 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 3747 transitions. [2022-01-18 16:23:53,979 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 3747 transitions. Word has length 35 [2022-01-18 16:23:53,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:53,980 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 3747 transitions. [2022-01-18 16:23:53,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 3747 transitions. [2022-01-18 16:23:53,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:23:53,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:53,981 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:53,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 16:23:54,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:54,182 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:54,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:54,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1096114186, now seen corresponding path program 50 times [2022-01-18 16:23:54,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:54,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636991031] [2022-01-18 16:23:54,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:54,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:54,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:54,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636991031] [2022-01-18 16:23:54,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636991031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:54,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781375422] [2022-01-18 16:23:54,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:23:54,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:54,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:54,443 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) [2022-01-18 16:23:54,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 16:23:54,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:23:54,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:54,464 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:23:54,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:55,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:55,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:55,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:55,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:55,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:55,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:55,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:23:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:55,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:55,909 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:23:55,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:23:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:56,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781375422] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:56,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:56,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-01-18 16:23:56,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419664608] [2022-01-18 16:23:56,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:56,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:23:56,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:56,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:23:56,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:23:56,693 INFO L87 Difference]: Start difference. First operand 1723 states and 3747 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:57,804 INFO L93 Difference]: Finished difference Result 2890 states and 6235 transitions. [2022-01-18 16:23:57,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:23:57,808 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:23:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:57,811 INFO L225 Difference]: With dead ends: 2890 [2022-01-18 16:23:57,811 INFO L226 Difference]: Without dead ends: 2860 [2022-01-18 16:23:57,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=658, Invalid=3764, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 16:23:57,812 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 188 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:57,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1160 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 839 Invalid, 0 Unknown, 221 Unchecked, 0.4s Time] [2022-01-18 16:23:57,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2022-01-18 16:23:57,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 1747. [2022-01-18 16:23:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 2.1781214203894614) internal successors, (3803), 1746 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 3803 transitions. [2022-01-18 16:23:57,831 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 3803 transitions. Word has length 35 [2022-01-18 16:23:57,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:57,831 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 3803 transitions. [2022-01-18 16:23:57,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:57,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 3803 transitions. [2022-01-18 16:23:57,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:23:57,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:57,833 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:57,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:58,033 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,SelfDestructingSolverStorable55 [2022-01-18 16:23:58,034 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:58,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:58,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2135634746, now seen corresponding path program 51 times [2022-01-18 16:23:58,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:58,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367663095] [2022-01-18 16:23:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:58,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:58,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:58,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367663095] [2022-01-18 16:23:58,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367663095] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:58,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232327838] [2022-01-18 16:23:58,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:23:58,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:58,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:58,240 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) [2022-01-18 16:23:58,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 16:23:58,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 16:23:58,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:58,264 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:23:58,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:58,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:58,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:58,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:58,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:58,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:58,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:23:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:58,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:59,637 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:23:59,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:24:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:00,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232327838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:00,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:00,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 35 [2022-01-18 16:24:00,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038315084] [2022-01-18 16:24:00,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:00,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:24:00,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:00,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:24:00,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:24:00,601 INFO L87 Difference]: Start difference. First operand 1747 states and 3803 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:02,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:02,151 INFO L93 Difference]: Finished difference Result 3655 states and 7698 transitions. [2022-01-18 16:24:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:24:02,151 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:24:02,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:02,155 INFO L225 Difference]: With dead ends: 3655 [2022-01-18 16:24:02,155 INFO L226 Difference]: Without dead ends: 3221 [2022-01-18 16:24:02,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=572, Invalid=3210, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:24:02,156 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 491 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:02,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 1570 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1410 Invalid, 0 Unknown, 64 Unchecked, 0.7s Time] [2022-01-18 16:24:02,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3221 states. [2022-01-18 16:24:02,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3221 to 1927. [2022-01-18 16:24:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 2.1895119418483904) internal successors, (4217), 1926 states have internal predecessors, (4217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 4217 transitions. [2022-01-18 16:24:02,180 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 4217 transitions. Word has length 35 [2022-01-18 16:24:02,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:02,180 INFO L470 AbstractCegarLoop]: Abstraction has 1927 states and 4217 transitions. [2022-01-18 16:24:02,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:02,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 4217 transitions. [2022-01-18 16:24:02,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:24:02,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:02,182 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:02,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 16:24:02,383 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,SelfDestructingSolverStorable56 [2022-01-18 16:24:02,383 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:02,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:02,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2096139370, now seen corresponding path program 52 times [2022-01-18 16:24:02,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:02,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633625227] [2022-01-18 16:24:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:02,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:02,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:02,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633625227] [2022-01-18 16:24:02,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633625227] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:02,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484041071] [2022-01-18 16:24:02,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:24:02,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:02,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:02,625 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) [2022-01-18 16:24:02,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 16:24:02,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:24:02,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:02,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:24:02,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:03,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:03,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:03,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:03,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:03,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:03,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:24:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:03,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:04,054 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:24:04,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:24:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:04,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484041071] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:04,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:04,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-01-18 16:24:04,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431848308] [2022-01-18 16:24:04,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:04,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:24:04,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:04,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:24:04,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:24:04,644 INFO L87 Difference]: Start difference. First operand 1927 states and 4217 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:06,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:06,192 INFO L93 Difference]: Finished difference Result 4268 states and 9267 transitions. [2022-01-18 16:24:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:24:06,192 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:24:06,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:06,197 INFO L225 Difference]: With dead ends: 4268 [2022-01-18 16:24:06,197 INFO L226 Difference]: Without dead ends: 3932 [2022-01-18 16:24:06,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1548 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=930, Invalid=4472, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:24:06,198 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 348 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:06,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 1333 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1042 Invalid, 0 Unknown, 469 Unchecked, 0.5s Time] [2022-01-18 16:24:06,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2022-01-18 16:24:06,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 1912. [2022-01-18 16:24:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 2.1805337519623236) internal successors, (4167), 1911 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 4167 transitions. [2022-01-18 16:24:06,223 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 4167 transitions. Word has length 35 [2022-01-18 16:24:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:06,223 INFO L470 AbstractCegarLoop]: Abstraction has 1912 states and 4167 transitions. [2022-01-18 16:24:06,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 4167 transitions. [2022-01-18 16:24:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:24:06,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:06,225 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:06,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:06,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:06,425 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:06,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:06,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1458995398, now seen corresponding path program 53 times [2022-01-18 16:24:06,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:06,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250363611] [2022-01-18 16:24:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:06,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:06,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:06,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250363611] [2022-01-18 16:24:06,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250363611] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:06,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208088676] [2022-01-18 16:24:06,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:24:06,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:06,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:06,661 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) [2022-01-18 16:24:06,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 16:24:06,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 16:24:06,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:06,684 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:24:06,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:07,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:07,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:07,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:07,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:07,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:24:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:07,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:08,093 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:24:08,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:24:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:08,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208088676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:08,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:08,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-01-18 16:24:08,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093293108] [2022-01-18 16:24:08,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:08,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:24:08,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:08,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:24:08,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:24:08,781 INFO L87 Difference]: Start difference. First operand 1912 states and 4167 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:09,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:09,829 INFO L93 Difference]: Finished difference Result 3252 states and 7031 transitions. [2022-01-18 16:24:09,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:24:09,829 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:24:09,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:09,833 INFO L225 Difference]: With dead ends: 3252 [2022-01-18 16:24:09,833 INFO L226 Difference]: Without dead ends: 3222 [2022-01-18 16:24:09,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=613, Invalid=3293, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 16:24:09,834 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 242 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:09,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 1073 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 625 Invalid, 0 Unknown, 359 Unchecked, 0.3s Time] [2022-01-18 16:24:09,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2022-01-18 16:24:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 2050. [2022-01-18 16:24:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 2.186920448999512) internal successors, (4481), 2049 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 4481 transitions. [2022-01-18 16:24:09,856 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 4481 transitions. Word has length 35 [2022-01-18 16:24:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:09,856 INFO L470 AbstractCegarLoop]: Abstraction has 2050 states and 4481 transitions. [2022-01-18 16:24:09,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:09,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 4481 transitions. [2022-01-18 16:24:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:24:09,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:09,858 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:09,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 16:24:10,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:10,072 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1282496970, now seen corresponding path program 54 times [2022-01-18 16:24:10,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:10,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137169822] [2022-01-18 16:24:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:10,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:10,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:10,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137169822] [2022-01-18 16:24:10,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137169822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:10,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770560880] [2022-01-18 16:24:10,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:24:10,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:10,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:10,340 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) [2022-01-18 16:24:10,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 16:24:10,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 16:24:10,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:10,364 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:24:10,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:10,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:10,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:10,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:10,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:24:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:10,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:11,805 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:24:11,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:24:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:12,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770560880] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:12,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:12,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-01-18 16:24:12,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791149223] [2022-01-18 16:24:12,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:12,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:12,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:12,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:12,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:12,714 INFO L87 Difference]: Start difference. First operand 2050 states and 4481 transitions. Second operand has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:13,689 INFO L93 Difference]: Finished difference Result 3617 states and 7865 transitions. [2022-01-18 16:24:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:24:13,690 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:24:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:13,694 INFO L225 Difference]: With dead ends: 3617 [2022-01-18 16:24:13,694 INFO L226 Difference]: Without dead ends: 3572 [2022-01-18 16:24:13,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=648, Invalid=3258, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 16:24:13,694 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 266 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:13,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 899 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 562 Invalid, 0 Unknown, 323 Unchecked, 0.3s Time] [2022-01-18 16:24:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2022-01-18 16:24:13,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2224. [2022-01-18 16:24:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.1938821412505622) internal successors, (4877), 2223 states have internal predecessors, (4877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:13,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 4877 transitions. [2022-01-18 16:24:13,719 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 4877 transitions. Word has length 35 [2022-01-18 16:24:13,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:13,719 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 4877 transitions. [2022-01-18 16:24:13,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:13,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 4877 transitions. [2022-01-18 16:24:13,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:24:13,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:13,721 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:13,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:13,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 16:24:13,922 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:13,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:13,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1332936966, now seen corresponding path program 55 times [2022-01-18 16:24:13,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:13,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150092357] [2022-01-18 16:24:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:13,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:14,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:14,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150092357] [2022-01-18 16:24:14,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150092357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:14,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306891458] [2022-01-18 16:24:14,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:24:14,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:14,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:14,157 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) [2022-01-18 16:24:14,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 16:24:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:14,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:24:14,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:14,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:14,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:14,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:14,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:24:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:14,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:15,574 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:24:15,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:24:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:16,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306891458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:16,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:16,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-01-18 16:24:16,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598381621] [2022-01-18 16:24:16,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:16,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:24:16,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:16,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:24:16,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:24:16,156 INFO L87 Difference]: Start difference. First operand 2224 states and 4877 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:18,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:18,281 INFO L93 Difference]: Finished difference Result 5467 states and 11723 transitions. [2022-01-18 16:24:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 16:24:18,281 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:24:18,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:18,287 INFO L225 Difference]: With dead ends: 5467 [2022-01-18 16:24:18,287 INFO L226 Difference]: Without dead ends: 4948 [2022-01-18 16:24:18,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=862, Invalid=4838, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 16:24:18,288 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 486 mSDsluCounter, 2265 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:18,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 1617 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1564 Invalid, 0 Unknown, 110 Unchecked, 0.7s Time] [2022-01-18 16:24:18,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2022-01-18 16:24:18,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 2767. [2022-01-18 16:24:18,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2766 states have (on average 2.2024584237165583) internal successors, (6092), 2766 states have internal predecessors, (6092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 6092 transitions. [2022-01-18 16:24:18,327 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 6092 transitions. Word has length 35 [2022-01-18 16:24:18,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:18,327 INFO L470 AbstractCegarLoop]: Abstraction has 2767 states and 6092 transitions. [2022-01-18 16:24:18,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 6092 transitions. [2022-01-18 16:24:18,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:24:18,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:18,329 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:18,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:18,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:18,543 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:18,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:18,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1388779334, now seen corresponding path program 56 times [2022-01-18 16:24:18,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:18,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803621408] [2022-01-18 16:24:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:18,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:24:18,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:18,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803621408] [2022-01-18 16:24:18,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803621408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:18,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989188073] [2022-01-18 16:24:18,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:24:18,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:18,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:18,739 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) [2022-01-18 16:24:18,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 16:24:18,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:24:18,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:18,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:24:18,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:19,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:19,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:19,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:24:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:19,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:20,059 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:24:20,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:24:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:21,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989188073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:21,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:21,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 32 [2022-01-18 16:24:21,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720853605] [2022-01-18 16:24:21,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:21,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 16:24:21,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:21,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 16:24:21,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:24:21,137 INFO L87 Difference]: Start difference. First operand 2767 states and 6092 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:22,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:22,625 INFO L93 Difference]: Finished difference Result 5618 states and 12121 transitions. [2022-01-18 16:24:22,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:24:22,626 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:24:22,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:22,632 INFO L225 Difference]: With dead ends: 5618 [2022-01-18 16:24:22,632 INFO L226 Difference]: Without dead ends: 5088 [2022-01-18 16:24:22,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=796, Invalid=3626, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 16:24:22,633 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 584 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:22,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 1197 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 949 Invalid, 0 Unknown, 245 Unchecked, 0.5s Time] [2022-01-18 16:24:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2022-01-18 16:24:22,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 2955. [2022-01-18 16:24:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 2.2109004739336493) internal successors, (6531), 2954 states have internal predecessors, (6531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:22,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 6531 transitions. [2022-01-18 16:24:22,676 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 6531 transitions. Word has length 35 [2022-01-18 16:24:22,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:22,676 INFO L470 AbstractCegarLoop]: Abstraction has 2955 states and 6531 transitions. [2022-01-18 16:24:22,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:22,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 6531 transitions. [2022-01-18 16:24:22,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:24:22,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:22,679 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:22,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 16:24:22,879 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,SelfDestructingSolverStorable61 [2022-01-18 16:24:22,879 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:22,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:22,879 INFO L85 PathProgramCache]: Analyzing trace with hash -285585158, now seen corresponding path program 57 times [2022-01-18 16:24:22,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:22,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743201873] [2022-01-18 16:24:22,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:22,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:23,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:23,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743201873] [2022-01-18 16:24:23,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743201873] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:23,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111430364] [2022-01-18 16:24:23,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:24:23,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:23,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:23,124 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) [2022-01-18 16:24:23,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 16:24:23,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 16:24:23,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:23,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:24:23,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:23,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:23,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:23,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:23,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:24:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:23,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:24,500 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:24:24,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:24:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:25,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111430364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:25,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:25,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 33 [2022-01-18 16:24:25,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158669092] [2022-01-18 16:24:25,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:25,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:24:25,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:25,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:24:25,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:24:25,280 INFO L87 Difference]: Start difference. First operand 2955 states and 6531 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:26,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:26,820 INFO L93 Difference]: Finished difference Result 5975 states and 12874 transitions. [2022-01-18 16:24:26,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 16:24:26,820 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:24:26,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:26,827 INFO L225 Difference]: With dead ends: 5975 [2022-01-18 16:24:26,828 INFO L226 Difference]: Without dead ends: 5495 [2022-01-18 16:24:26,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=667, Invalid=3115, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:24:26,829 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 446 mSDsluCounter, 1970 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:26,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 1423 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1377 Invalid, 0 Unknown, 123 Unchecked, 0.6s Time] [2022-01-18 16:24:26,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2022-01-18 16:24:26,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 2999. [2022-01-18 16:24:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 2.208138759172782) internal successors, (6620), 2998 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 6620 transitions. [2022-01-18 16:24:26,881 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 6620 transitions. Word has length 35 [2022-01-18 16:24:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:26,881 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 6620 transitions. [2022-01-18 16:24:26,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:26,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 6620 transitions. [2022-01-18 16:24:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:24:26,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:26,884 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:26,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:27,099 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,SelfDestructingSolverStorable62 [2022-01-18 16:24:27,100 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:27,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:27,100 INFO L85 PathProgramCache]: Analyzing trace with hash 414751994, now seen corresponding path program 58 times [2022-01-18 16:24:27,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:27,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626510719] [2022-01-18 16:24:27,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:27,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:27,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:27,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626510719] [2022-01-18 16:24:27,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626510719] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:27,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725071738] [2022-01-18 16:24:27,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:24:27,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:27,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:27,356 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) [2022-01-18 16:24:27,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 16:24:27,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:24:27,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:27,377 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:24:27,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:27,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:27,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:27,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:27,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:24:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:27,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:28,726 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:24:28,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:24:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:29,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725071738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:29,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:29,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-01-18 16:24:29,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6870235] [2022-01-18 16:24:29,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:29,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:24:29,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:29,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:24:29,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:24:29,704 INFO L87 Difference]: Start difference. First operand 2999 states and 6620 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:30,875 INFO L93 Difference]: Finished difference Result 5146 states and 11289 transitions. [2022-01-18 16:24:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:24:30,875 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:24:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:30,881 INFO L225 Difference]: With dead ends: 5146 [2022-01-18 16:24:30,881 INFO L226 Difference]: Without dead ends: 4927 [2022-01-18 16:24:30,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=632, Invalid=3400, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:24:30,881 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 308 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:30,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 1354 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 946 Invalid, 0 Unknown, 504 Unchecked, 0.4s Time] [2022-01-18 16:24:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4927 states. [2022-01-18 16:24:30,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4927 to 3147. [2022-01-18 16:24:30,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3147 states, 3146 states have (on average 2.214558169103624) internal successors, (6967), 3146 states have internal predecessors, (6967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3147 states to 3147 states and 6967 transitions. [2022-01-18 16:24:30,930 INFO L78 Accepts]: Start accepts. Automaton has 3147 states and 6967 transitions. Word has length 35 [2022-01-18 16:24:30,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:30,930 INFO L470 AbstractCegarLoop]: Abstraction has 3147 states and 6967 transitions. [2022-01-18 16:24:30,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3147 states and 6967 transitions. [2022-01-18 16:24:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:24:30,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:30,933 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:30,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 16:24:31,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:31,133 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:31,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:31,134 INFO L85 PathProgramCache]: Analyzing trace with hash -910338166, now seen corresponding path program 59 times [2022-01-18 16:24:31,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:31,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963319923] [2022-01-18 16:24:31,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:31,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:31,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:31,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963319923] [2022-01-18 16:24:31,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963319923] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:31,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085465667] [2022-01-18 16:24:31,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:24:31,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:31,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:31,364 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) [2022-01-18 16:24:31,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 16:24:31,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 16:24:31,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:31,386 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-18 16:24:31,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:31,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:31,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:31,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 41 [2022-01-18 16:24:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:31,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:32,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:24:32,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 112 treesize of output 284 [2022-01-18 16:24:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:32,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085465667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:32,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:32,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 33 [2022-01-18 16:24:32,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535491963] [2022-01-18 16:24:32,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:32,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:24:32,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:32,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:24:32,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=842, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:24:32,858 INFO L87 Difference]: Start difference. First operand 3147 states and 6967 transitions. Second operand has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:34,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:34,691 INFO L93 Difference]: Finished difference Result 5025 states and 10723 transitions. [2022-01-18 16:24:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:24:34,691 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:24:34,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:34,697 INFO L225 Difference]: With dead ends: 5025 [2022-01-18 16:24:34,697 INFO L226 Difference]: Without dead ends: 4661 [2022-01-18 16:24:34,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=777, Invalid=2763, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 16:24:34,700 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 631 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:34,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 872 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 835 Invalid, 0 Unknown, 39 Unchecked, 0.5s Time] [2022-01-18 16:24:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2022-01-18 16:24:34,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3404. [2022-01-18 16:24:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3404 states, 3403 states have (on average 2.208639435791948) internal successors, (7516), 3403 states have internal predecessors, (7516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:34,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3404 states to 3404 states and 7516 transitions. [2022-01-18 16:24:34,740 INFO L78 Accepts]: Start accepts. Automaton has 3404 states and 7516 transitions. Word has length 35 [2022-01-18 16:24:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:34,740 INFO L470 AbstractCegarLoop]: Abstraction has 3404 states and 7516 transitions. [2022-01-18 16:24:34,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:34,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3404 states and 7516 transitions. [2022-01-18 16:24:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:24:34,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:34,742 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:34,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 16:24:34,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:34,943 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:34,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:34,943 INFO L85 PathProgramCache]: Analyzing trace with hash 550321546, now seen corresponding path program 60 times [2022-01-18 16:24:34,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:34,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021076592] [2022-01-18 16:24:34,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:34,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:35,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:35,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021076592] [2022-01-18 16:24:35,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021076592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:35,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100812569] [2022-01-18 16:24:35,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:24:35,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:35,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:35,213 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) [2022-01-18 16:24:35,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 16:24:35,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 16:24:35,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:35,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:24:35,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:36,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:36,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:36,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:36,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 39 [2022-01-18 16:24:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:36,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:37,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,996 INFO L353 Elim1Store]: treesize reduction 63, result has 76.9 percent of original size [2022-01-18 16:24:37,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 40 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 26 case distinctions, treesize of input 106 treesize of output 255 [2022-01-18 16:24:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:38,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100812569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:38,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:38,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 35 [2022-01-18 16:24:38,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642191860] [2022-01-18 16:24:38,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:38,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:24:38,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:38,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:24:38,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:24:38,487 INFO L87 Difference]: Start difference. First operand 3404 states and 7516 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:41,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:41,846 INFO L93 Difference]: Finished difference Result 3803 states and 8346 transitions. [2022-01-18 16:24:41,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 16:24:41,847 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:24:41,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:41,850 INFO L225 Difference]: With dead ends: 3803 [2022-01-18 16:24:41,850 INFO L226 Difference]: Without dead ends: 3791 [2022-01-18 16:24:41,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 16:24:41,851 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 225 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 493 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:41,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1043 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 153 Invalid, 0 Unknown, 493 Unchecked, 0.1s Time] [2022-01-18 16:24:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3791 states. [2022-01-18 16:24:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3791 to 3523. [2022-01-18 16:24:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3523 states, 3522 states have (on average 2.2234525837592276) internal successors, (7831), 3522 states have internal predecessors, (7831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3523 states to 3523 states and 7831 transitions. [2022-01-18 16:24:41,882 INFO L78 Accepts]: Start accepts. Automaton has 3523 states and 7831 transitions. Word has length 35 [2022-01-18 16:24:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:41,882 INFO L470 AbstractCegarLoop]: Abstraction has 3523 states and 7831 transitions. [2022-01-18 16:24:41,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3523 states and 7831 transitions. [2022-01-18 16:24:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:24:41,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:41,885 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:41,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 16:24:42,085 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,SelfDestructingSolverStorable65 [2022-01-18 16:24:42,085 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:42,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:42,086 INFO L85 PathProgramCache]: Analyzing trace with hash -949833542, now seen corresponding path program 61 times [2022-01-18 16:24:42,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:42,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707680493] [2022-01-18 16:24:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:42,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:24:42,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:42,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707680493] [2022-01-18 16:24:42,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707680493] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:42,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060034733] [2022-01-18 16:24:42,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:24:42,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:42,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:42,354 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) [2022-01-18 16:24:42,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 16:24:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:42,377 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:24:42,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:42,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:42,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:24:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:42,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:43,696 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:24:43,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:24:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:44,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060034733] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:44,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:44,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2022-01-18 16:24:44,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180516540] [2022-01-18 16:24:44,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:44,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:24:44,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:44,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:24:44,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:24:44,501 INFO L87 Difference]: Start difference. First operand 3523 states and 7831 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:46,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:46,249 INFO L93 Difference]: Finished difference Result 5765 states and 12652 transitions. [2022-01-18 16:24:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 16:24:46,250 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:24:46,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:46,256 INFO L225 Difference]: With dead ends: 5765 [2022-01-18 16:24:46,256 INFO L226 Difference]: Without dead ends: 5453 [2022-01-18 16:24:46,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1056, Invalid=4950, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:24:46,257 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 346 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:46,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 1472 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1124 Invalid, 0 Unknown, 243 Unchecked, 0.5s Time] [2022-01-18 16:24:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2022-01-18 16:24:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 3586. [2022-01-18 16:24:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3585 states have (on average 2.224825662482566) internal successors, (7976), 3585 states have internal predecessors, (7976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:46,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 7976 transitions. [2022-01-18 16:24:46,299 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 7976 transitions. Word has length 35 [2022-01-18 16:24:46,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:46,299 INFO L470 AbstractCegarLoop]: Abstraction has 3586 states and 7976 transitions. [2022-01-18 16:24:46,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:46,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 7976 transitions. [2022-01-18 16:24:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:24:46,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:46,301 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:46,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-18 16:24:46,502 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,SelfDestructingSolverStorable66 [2022-01-18 16:24:46,502 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:46,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash -210001014, now seen corresponding path program 62 times [2022-01-18 16:24:46,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:46,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915355011] [2022-01-18 16:24:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:46,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:46,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:46,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915355011] [2022-01-18 16:24:46,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915355011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:46,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639452636] [2022-01-18 16:24:46,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:24:46,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:46,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:46,792 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) [2022-01-18 16:24:46,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 16:24:46,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:24:46,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:46,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:24:46,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:47,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:47,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:47,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:24:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:47,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:48,173 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:24:48,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:24:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:48,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639452636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:48,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:48,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-01-18 16:24:48,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258643445] [2022-01-18 16:24:48,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:48,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:24:48,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:48,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:24:48,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:24:48,921 INFO L87 Difference]: Start difference. First operand 3586 states and 7976 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:50,168 INFO L93 Difference]: Finished difference Result 5283 states and 11632 transitions. [2022-01-18 16:24:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:24:50,168 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:24:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:50,174 INFO L225 Difference]: With dead ends: 5283 [2022-01-18 16:24:50,174 INFO L226 Difference]: Without dead ends: 5238 [2022-01-18 16:24:50,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=697, Invalid=3463, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 16:24:50,175 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 271 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:50,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 1385 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 944 Invalid, 0 Unknown, 271 Unchecked, 0.4s Time] [2022-01-18 16:24:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2022-01-18 16:24:50,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 3736. [2022-01-18 16:24:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3736 states, 3735 states have (on average 2.23239625167336) internal successors, (8338), 3735 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3736 states to 3736 states and 8338 transitions. [2022-01-18 16:24:50,219 INFO L78 Accepts]: Start accepts. Automaton has 3736 states and 8338 transitions. Word has length 35 [2022-01-18 16:24:50,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:50,219 INFO L470 AbstractCegarLoop]: Abstraction has 3736 states and 8338 transitions. [2022-01-18 16:24:50,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:50,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3736 states and 8338 transitions. [2022-01-18 16:24:50,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:24:50,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:50,222 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:50,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 16:24:50,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:50,423 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1249970874, now seen corresponding path program 63 times [2022-01-18 16:24:50,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:50,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685179425] [2022-01-18 16:24:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:50,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:50,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:50,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685179425] [2022-01-18 16:24:50,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685179425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:50,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905486511] [2022-01-18 16:24:50,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:24:50,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:50,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:50,682 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) [2022-01-18 16:24:50,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 16:24:50,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 16:24:50,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:50,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:24:50,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:51,143 INFO L353 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2022-01-18 16:24:51,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:24:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:51,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:51,976 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:24:51,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:24:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:52,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905486511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:52,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:52,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-01-18 16:24:52,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782769479] [2022-01-18 16:24:52,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:52,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:24:52,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:52,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:24:52,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:24:52,917 INFO L87 Difference]: Start difference. First operand 3736 states and 8338 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:54,192 INFO L93 Difference]: Finished difference Result 5713 states and 12688 transitions. [2022-01-18 16:24:54,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:24:54,193 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:24:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:54,199 INFO L225 Difference]: With dead ends: 5713 [2022-01-18 16:24:54,199 INFO L226 Difference]: Without dead ends: 5683 [2022-01-18 16:24:54,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=610, Invalid=3050, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:24:54,199 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 245 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:54,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 1357 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:24:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5683 states. [2022-01-18 16:24:54,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5683 to 3696. [2022-01-18 16:24:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 3695 states have (on average 2.230581867388363) internal successors, (8242), 3695 states have internal predecessors, (8242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 8242 transitions. [2022-01-18 16:24:54,243 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 8242 transitions. Word has length 35 [2022-01-18 16:24:54,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:54,243 INFO L470 AbstractCegarLoop]: Abstraction has 3696 states and 8242 transitions. [2022-01-18 16:24:54,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:54,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 8242 transitions. [2022-01-18 16:24:54,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 16:24:54,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:54,246 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:54,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 16:24:54,446 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,SelfDestructingSolverStorable68 [2022-01-18 16:24:54,447 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:54,447 INFO L85 PathProgramCache]: Analyzing trace with hash -550040129, now seen corresponding path program 64 times [2022-01-18 16:24:54,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:54,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841262798] [2022-01-18 16:24:54,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:54,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:24:54,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:54,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841262798] [2022-01-18 16:24:54,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841262798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:54,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846816565] [2022-01-18 16:24:54,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:24:54,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:54,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:54,486 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) [2022-01-18 16:24:54,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 16:24:54,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:24:54,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:54,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 16:24:54,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:24:54,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:24:54,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846816565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:54,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:54,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-18 16:24:54,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662522187] [2022-01-18 16:24:54,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:54,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:24:54,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:54,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:24:54,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:24:54,605 INFO L87 Difference]: Start difference. First operand 3696 states and 8242 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:54,643 INFO L93 Difference]: Finished difference Result 4782 states and 10779 transitions. [2022-01-18 16:24:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 16:24:54,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 16:24:54,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:54,648 INFO L225 Difference]: With dead ends: 4782 [2022-01-18 16:24:54,648 INFO L226 Difference]: Without dead ends: 4767 [2022-01-18 16:24:54,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:24:54,648 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:54,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 80 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:24:54,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2022-01-18 16:24:54,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 4371. [2022-01-18 16:24:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4370 states have (on average 2.2496567505720826) internal successors, (9831), 4370 states have internal predecessors, (9831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 9831 transitions. [2022-01-18 16:24:54,690 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 9831 transitions. Word has length 36 [2022-01-18 16:24:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:54,690 INFO L470 AbstractCegarLoop]: Abstraction has 4371 states and 9831 transitions. [2022-01-18 16:24:54,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 9831 transitions. [2022-01-18 16:24:54,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 16:24:54,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:54,693 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:54,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:54,899 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,SelfDestructingSolverStorable69 [2022-01-18 16:24:54,899 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:54,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:54,899 INFO L85 PathProgramCache]: Analyzing trace with hash -75450097, now seen corresponding path program 65 times [2022-01-18 16:24:54,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:54,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088856323] [2022-01-18 16:24:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:54,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:54,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:54,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088856323] [2022-01-18 16:24:54,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088856323] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:54,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88468909] [2022-01-18 16:24:54,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:24:54,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:54,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:54,964 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) [2022-01-18 16:24:54,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 16:24:54,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 16:24:54,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:54,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 16:24:54,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:55,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:55,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88468909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:55,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:55,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-18 16:24:55,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265145520] [2022-01-18 16:24:55,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:55,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 16:24:55,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:55,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 16:24:55,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:24:55,093 INFO L87 Difference]: Start difference. First operand 4371 states and 9831 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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) [2022-01-18 16:24:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:55,139 INFO L93 Difference]: Finished difference Result 6001 states and 13669 transitions. [2022-01-18 16:24:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 16:24:55,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 36 [2022-01-18 16:24:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:55,146 INFO L225 Difference]: With dead ends: 6001 [2022-01-18 16:24:55,146 INFO L226 Difference]: Without dead ends: 5994 [2022-01-18 16:24:55,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:24:55,146 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 103 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:55,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 97 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:24:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5994 states. [2022-01-18 16:24:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5994 to 5544. [2022-01-18 16:24:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5544 states, 5543 states have (on average 2.28287930723435) internal successors, (12654), 5543 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5544 states to 5544 states and 12654 transitions. [2022-01-18 16:24:55,212 INFO L78 Accepts]: Start accepts. Automaton has 5544 states and 12654 transitions. Word has length 36 [2022-01-18 16:24:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:55,212 INFO L470 AbstractCegarLoop]: Abstraction has 5544 states and 12654 transitions. [2022-01-18 16:24:55,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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) [2022-01-18 16:24:55,212 INFO L276 IsEmpty]: Start isEmpty. Operand 5544 states and 12654 transitions. [2022-01-18 16:24:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 16:24:55,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:55,215 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:55,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 16:24:55,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:55,416 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:55,416 INFO L85 PathProgramCache]: Analyzing trace with hash -126350153, now seen corresponding path program 66 times [2022-01-18 16:24:55,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:55,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000207448] [2022-01-18 16:24:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:55,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:55,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:55,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000207448] [2022-01-18 16:24:55,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000207448] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:55,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468124251] [2022-01-18 16:24:55,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:24:55,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:55,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:55,673 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) [2022-01-18 16:24:55,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 16:24:55,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 16:24:55,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:55,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-18 16:24:55,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:56,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:56,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:56,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:56,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:56,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:56,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:56,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 39 [2022-01-18 16:24:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:56,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:57,247 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:24:57,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 114 treesize of output 396 [2022-01-18 16:24:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:58,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468124251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:58,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:58,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 39 [2022-01-18 16:24:58,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176515492] [2022-01-18 16:24:58,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:58,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:24:58,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:58,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:24:58,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:24:58,027 INFO L87 Difference]: Start difference. First operand 5544 states and 12654 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:59,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:59,736 INFO L93 Difference]: Finished difference Result 9557 states and 21469 transitions. [2022-01-18 16:24:59,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:24:59,737 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:24:59,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:59,748 INFO L225 Difference]: With dead ends: 9557 [2022-01-18 16:24:59,748 INFO L226 Difference]: Without dead ends: 8975 [2022-01-18 16:24:59,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=937, Invalid=5069, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:24:59,749 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 488 mSDsluCounter, 2060 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:59,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 1451 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1156 Invalid, 0 Unknown, 442 Unchecked, 0.6s Time] [2022-01-18 16:24:59,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8975 states. [2022-01-18 16:24:59,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8975 to 5433. [2022-01-18 16:24:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 5432 states have (on average 2.2790868924889542) internal successors, (12380), 5432 states have internal predecessors, (12380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 12380 transitions. [2022-01-18 16:24:59,822 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 12380 transitions. Word has length 38 [2022-01-18 16:24:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:59,823 INFO L470 AbstractCegarLoop]: Abstraction has 5433 states and 12380 transitions. [2022-01-18 16:24:59,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:59,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 12380 transitions. [2022-01-18 16:24:59,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 16:24:59,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:59,826 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:59,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 16:25:00,026 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,SelfDestructingSolverStorable71 [2022-01-18 16:25:00,027 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:00,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:00,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1118066151, now seen corresponding path program 67 times [2022-01-18 16:25:00,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:00,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323562263] [2022-01-18 16:25:00,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:00,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:00,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:00,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323562263] [2022-01-18 16:25:00,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323562263] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:00,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667061663] [2022-01-18 16:25:00,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:25:00,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:00,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:00,279 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) [2022-01-18 16:25:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:00,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 16:25:00,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:25:00,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:00,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:00,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:00,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:00,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:00,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:00,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:00,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:25:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:00,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:01,835 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:25:01,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:25:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 24 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:02,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667061663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:02,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:02,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-01-18 16:25:02,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619306862] [2022-01-18 16:25:02,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:02,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:25:02,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:02,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:25:02,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:25:02,912 INFO L87 Difference]: Start difference. First operand 5433 states and 12380 transitions. Second operand has 39 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:03,888 INFO L93 Difference]: Finished difference Result 7645 states and 17175 transitions. [2022-01-18 16:25:03,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:25:03,888 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:25:03,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:03,897 INFO L225 Difference]: With dead ends: 7645 [2022-01-18 16:25:03,897 INFO L226 Difference]: Without dead ends: 7615 [2022-01-18 16:25:03,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=619, Invalid=3413, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:25:03,898 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 244 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:03,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1053 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 613 Invalid, 0 Unknown, 422 Unchecked, 0.3s Time] [2022-01-18 16:25:03,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7615 states. [2022-01-18 16:25:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7615 to 5418. [2022-01-18 16:25:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5418 states, 5417 states have (on average 2.278936680819642) internal successors, (12345), 5417 states have internal predecessors, (12345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5418 states to 5418 states and 12345 transitions. [2022-01-18 16:25:03,963 INFO L78 Accepts]: Start accepts. Automaton has 5418 states and 12345 transitions. Word has length 38 [2022-01-18 16:25:03,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:03,963 INFO L470 AbstractCegarLoop]: Abstraction has 5418 states and 12345 transitions. [2022-01-18 16:25:03,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:03,963 INFO L276 IsEmpty]: Start isEmpty. Operand 5418 states and 12345 transitions. [2022-01-18 16:25:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 16:25:03,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:03,966 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:03,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:04,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:04,167 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:04,167 INFO L85 PathProgramCache]: Analyzing trace with hash 179362343, now seen corresponding path program 68 times [2022-01-18 16:25:04,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:04,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735709285] [2022-01-18 16:25:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:04,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:04,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:04,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735709285] [2022-01-18 16:25:04,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735709285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:04,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159279525] [2022-01-18 16:25:04,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:25:04,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:04,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:04,435 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) [2022-01-18 16:25:04,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 16:25:04,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:25:04,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:04,458 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:25:04,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:05,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:05,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:05,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:05,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:05,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:05,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:25:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:05,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:05,978 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:25:05,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:25:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:06,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159279525] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:06,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:06,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-01-18 16:25:06,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989010182] [2022-01-18 16:25:06,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:06,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:25:06,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:06,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:25:06,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:25:06,580 INFO L87 Difference]: Start difference. First operand 5418 states and 12345 transitions. Second operand has 38 states, 38 states have (on average 2.5) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:07,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:07,894 INFO L93 Difference]: Finished difference Result 8029 states and 18002 transitions. [2022-01-18 16:25:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:25:07,894 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:25:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:07,904 INFO L225 Difference]: With dead ends: 8029 [2022-01-18 16:25:07,904 INFO L226 Difference]: Without dead ends: 7999 [2022-01-18 16:25:07,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=835, Invalid=4135, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 16:25:07,905 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 244 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:07,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1107 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 683 Invalid, 0 Unknown, 310 Unchecked, 0.4s Time] [2022-01-18 16:25:07,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7999 states. [2022-01-18 16:25:07,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7999 to 5406. [2022-01-18 16:25:07,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5406 states, 5405 states have (on average 2.2788159111933397) internal successors, (12317), 5405 states have internal predecessors, (12317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5406 states to 5406 states and 12317 transitions. [2022-01-18 16:25:07,990 INFO L78 Accepts]: Start accepts. Automaton has 5406 states and 12317 transitions. Word has length 38 [2022-01-18 16:25:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:07,990 INFO L470 AbstractCegarLoop]: Abstraction has 5406 states and 12317 transitions. [2022-01-18 16:25:07,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:07,990 INFO L276 IsEmpty]: Start isEmpty. Operand 5406 states and 12317 transitions. [2022-01-18 16:25:07,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 16:25:07,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:07,993 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:08,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 16:25:08,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:08,194 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:08,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:08,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1553836215, now seen corresponding path program 69 times [2022-01-18 16:25:08,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:08,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524204851] [2022-01-18 16:25:08,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:08,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:08,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:08,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524204851] [2022-01-18 16:25:08,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524204851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:08,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908024878] [2022-01-18 16:25:08,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:25:08,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:08,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:08,469 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) [2022-01-18 16:25:08,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 16:25:08,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 16:25:08,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:08,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:25:08,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:09,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:09,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:09,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:09,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:09,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:09,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:25:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:09,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:09,968 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:25:09,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:25:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:10,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908024878] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:10,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:10,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-01-18 16:25:10,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974812359] [2022-01-18 16:25:10,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:10,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:25:10,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:10,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:25:10,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:25:10,829 INFO L87 Difference]: Start difference. First operand 5406 states and 12317 transitions. Second operand has 38 states, 38 states have (on average 2.5) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:12,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:12,901 INFO L93 Difference]: Finished difference Result 6913 states and 15499 transitions. [2022-01-18 16:25:12,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 16:25:12,902 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:25:12,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:12,910 INFO L225 Difference]: With dead ends: 6913 [2022-01-18 16:25:12,910 INFO L226 Difference]: Without dead ends: 6895 [2022-01-18 16:25:12,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2367 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1185, Invalid=6647, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 16:25:12,911 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 272 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:12,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1354 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1036 Invalid, 0 Unknown, 379 Unchecked, 0.6s Time] [2022-01-18 16:25:12,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6895 states. [2022-01-18 16:25:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6895 to 5612. [2022-01-18 16:25:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5612 states, 5611 states have (on average 2.283193726608448) internal successors, (12811), 5611 states have internal predecessors, (12811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5612 states to 5612 states and 12811 transitions. [2022-01-18 16:25:12,972 INFO L78 Accepts]: Start accepts. Automaton has 5612 states and 12811 transitions. Word has length 38 [2022-01-18 16:25:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:12,972 INFO L470 AbstractCegarLoop]: Abstraction has 5612 states and 12811 transitions. [2022-01-18 16:25:12,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 5612 states and 12811 transitions. [2022-01-18 16:25:12,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 16:25:12,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:12,975 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:12,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:13,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:13,176 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:13,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1601733385, now seen corresponding path program 70 times [2022-01-18 16:25:13,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:13,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156225775] [2022-01-18 16:25:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:13,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:13,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:13,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156225775] [2022-01-18 16:25:13,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156225775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:13,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918431250] [2022-01-18 16:25:13,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:25:13,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:13,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:13,405 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) [2022-01-18 16:25:13,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 16:25:13,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:25:13,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:13,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:25:13,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:14,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:14,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:14,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:14,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:25:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:14,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:14,865 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:25:14,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:25:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:15,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918431250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:15,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:15,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-01-18 16:25:15,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284076671] [2022-01-18 16:25:15,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:15,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 16:25:15,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:15,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 16:25:15,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 16:25:15,841 INFO L87 Difference]: Start difference. First operand 5612 states and 12811 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:17,534 INFO L93 Difference]: Finished difference Result 9861 states and 22431 transitions. [2022-01-18 16:25:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:25:17,534 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:25:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:17,546 INFO L225 Difference]: With dead ends: 9861 [2022-01-18 16:25:17,547 INFO L226 Difference]: Without dead ends: 9397 [2022-01-18 16:25:17,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=757, Invalid=4213, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 16:25:17,547 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 426 mSDsluCounter, 2474 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 453 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:17,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 1761 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1294 Invalid, 0 Unknown, 453 Unchecked, 0.6s Time] [2022-01-18 16:25:17,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9397 states. [2022-01-18 16:25:17,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9397 to 6792. [2022-01-18 16:25:17,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6792 states, 6791 states have (on average 2.298336032984833) internal successors, (15608), 6791 states have internal predecessors, (15608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6792 states to 6792 states and 15608 transitions. [2022-01-18 16:25:17,650 INFO L78 Accepts]: Start accepts. Automaton has 6792 states and 15608 transitions. Word has length 38 [2022-01-18 16:25:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:17,650 INFO L470 AbstractCegarLoop]: Abstraction has 6792 states and 15608 transitions. [2022-01-18 16:25:17,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 6792 states and 15608 transitions. [2022-01-18 16:25:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 16:25:17,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:17,654 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:17,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:17,855 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,SelfDestructingSolverStorable75 [2022-01-18 16:25:17,855 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:17,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:17,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1413514287, now seen corresponding path program 71 times [2022-01-18 16:25:17,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:17,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641163059] [2022-01-18 16:25:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:17,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:25:18,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:18,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641163059] [2022-01-18 16:25:18,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641163059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:18,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035886713] [2022-01-18 16:25:18,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:25:18,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:18,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:18,109 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) [2022-01-18 16:25:18,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 16:25:18,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 16:25:18,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:18,136 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-18 16:25:18,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:18,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:18,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:18,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-01-18 16:25:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:25:18,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:19,493 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:25:19,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-01-18 16:25:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:25:20,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035886713] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:20,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:20,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2022-01-18 16:25:20,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501425297] [2022-01-18 16:25:20,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:20,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:25:20,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:25:20,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:25:20,173 INFO L87 Difference]: Start difference. First operand 6792 states and 15608 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:21,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:21,154 INFO L93 Difference]: Finished difference Result 9603 states and 21742 transitions. [2022-01-18 16:25:21,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:25:21,154 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:25:21,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:21,166 INFO L225 Difference]: With dead ends: 9603 [2022-01-18 16:25:21,166 INFO L226 Difference]: Without dead ends: 9545 [2022-01-18 16:25:21,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=529, Invalid=2441, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 16:25:21,167 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 235 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:21,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 959 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 710 Invalid, 0 Unknown, 153 Unchecked, 0.3s Time] [2022-01-18 16:25:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9545 states. [2022-01-18 16:25:21,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9545 to 7236. [2022-01-18 16:25:21,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 2.31596406357982) internal successors, (16756), 7235 states have internal predecessors, (16756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 16756 transitions. [2022-01-18 16:25:21,269 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 16756 transitions. Word has length 38 [2022-01-18 16:25:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:21,269 INFO L470 AbstractCegarLoop]: Abstraction has 7236 states and 16756 transitions. [2022-01-18 16:25:21,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 16756 transitions. [2022-01-18 16:25:21,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-18 16:25:21,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:21,273 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:21,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:21,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:21,473 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:21,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:21,474 INFO L85 PathProgramCache]: Analyzing trace with hash 378106983, now seen corresponding path program 72 times [2022-01-18 16:25:21,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:21,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429709289] [2022-01-18 16:25:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:21,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:21,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:21,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429709289] [2022-01-18 16:25:21,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429709289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:21,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434678203] [2022-01-18 16:25:21,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:25:21,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:21,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:21,726 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) [2022-01-18 16:25:21,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 16:25:21,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:25:21,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:21,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-18 16:25:21,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:22,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:22,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:22,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 39 [2022-01-18 16:25:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:22,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:23,168 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-01-18 16:25:23,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 114 treesize of output 396 [2022-01-18 16:25:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:23,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434678203] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:23,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:23,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 35 [2022-01-18 16:25:23,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803932004] [2022-01-18 16:25:23,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:23,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:25:23,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:23,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:25:23,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:25:23,727 INFO L87 Difference]: Start difference. First operand 7236 states and 16756 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:25,815 INFO L93 Difference]: Finished difference Result 11795 states and 26648 transitions. [2022-01-18 16:25:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 16:25:25,815 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-18 16:25:25,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:25,830 INFO L225 Difference]: With dead ends: 11795 [2022-01-18 16:25:25,831 INFO L226 Difference]: Without dead ends: 11076 [2022-01-18 16:25:25,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=984, Invalid=5178, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:25:25,831 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 515 mSDsluCounter, 2858 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 2395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 851 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:25,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1949 Invalid, 2395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1459 Invalid, 0 Unknown, 851 Unchecked, 0.7s Time] [2022-01-18 16:25:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11076 states. [2022-01-18 16:25:25,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11076 to 7037. [2022-01-18 16:25:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7037 states, 7036 states have (on average 2.3099772598067085) internal successors, (16253), 7036 states have internal predecessors, (16253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7037 states to 7037 states and 16253 transitions. [2022-01-18 16:25:25,940 INFO L78 Accepts]: Start accepts. Automaton has 7037 states and 16253 transitions. Word has length 38 [2022-01-18 16:25:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:25,941 INFO L470 AbstractCegarLoop]: Abstraction has 7037 states and 16253 transitions. [2022-01-18 16:25:25,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 7037 states and 16253 transitions. [2022-01-18 16:25:25,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:25:25,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:25,944 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:25,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-18 16:25:26,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:26,145 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:26,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1281737470, now seen corresponding path program 73 times [2022-01-18 16:25:26,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:26,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246518301] [2022-01-18 16:25:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:26,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:26,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:26,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246518301] [2022-01-18 16:25:26,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246518301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:26,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374181926] [2022-01-18 16:25:26,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:25:26,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:26,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:26,406 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) [2022-01-18 16:25:26,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 16:25:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:26,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:25:26,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:27,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:27,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:27,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:27,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:27,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:27,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:27,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:27,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:25:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:27,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:28,415 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:25:28,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:25:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:29,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374181926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:29,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:29,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-01-18 16:25:29,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487599849] [2022-01-18 16:25:29,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:29,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:25:29,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:29,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:25:29,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:25:29,368 INFO L87 Difference]: Start difference. First operand 7037 states and 16253 transitions. Second operand has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:33,366 INFO L93 Difference]: Finished difference Result 16057 states and 36105 transitions. [2022-01-18 16:25:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-18 16:25:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:25:33,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:33,388 INFO L225 Difference]: With dead ends: 16057 [2022-01-18 16:25:33,388 INFO L226 Difference]: Without dead ends: 15793 [2022-01-18 16:25:33,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6018 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2248, Invalid=15308, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 16:25:33,389 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 477 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:33,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 1794 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1521 Invalid, 0 Unknown, 320 Unchecked, 0.9s Time] [2022-01-18 16:25:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15793 states. [2022-01-18 16:25:33,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15793 to 8514. [2022-01-18 16:25:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8514 states, 8513 states have (on average 2.3016562903794195) internal successors, (19594), 8513 states have internal predecessors, (19594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:33,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8514 states to 8514 states and 19594 transitions. [2022-01-18 16:25:33,532 INFO L78 Accepts]: Start accepts. Automaton has 8514 states and 19594 transitions. Word has length 39 [2022-01-18 16:25:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:33,532 INFO L470 AbstractCegarLoop]: Abstraction has 8514 states and 19594 transitions. [2022-01-18 16:25:33,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:33,532 INFO L276 IsEmpty]: Start isEmpty. Operand 8514 states and 19594 transitions. [2022-01-18 16:25:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:25:33,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:33,536 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:33,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 16:25:33,737 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,SelfDestructingSolverStorable78 [2022-01-18 16:25:33,737 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:33,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:33,737 INFO L85 PathProgramCache]: Analyzing trace with hash 92736402, now seen corresponding path program 74 times [2022-01-18 16:25:33,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:33,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870975107] [2022-01-18 16:25:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:33,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:33,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:33,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870975107] [2022-01-18 16:25:33,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870975107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:33,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422534025] [2022-01-18 16:25:33,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:25:33,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:33,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:33,993 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) [2022-01-18 16:25:33,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 16:25:34,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:25:34,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:34,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:25:34,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:34,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:34,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:34,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:34,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:34,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:34,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:34,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:25:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:34,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:36,032 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:25:36,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:25:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:37,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422534025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:37,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:37,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-01-18 16:25:37,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461814061] [2022-01-18 16:25:37,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:37,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:25:37,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:25:37,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:25:37,273 INFO L87 Difference]: Start difference. First operand 8514 states and 19594 transitions. Second operand has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:41,396 INFO L93 Difference]: Finished difference Result 15092 states and 34042 transitions. [2022-01-18 16:25:41,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-18 16:25:41,396 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:25:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:41,418 INFO L225 Difference]: With dead ends: 15092 [2022-01-18 16:25:41,418 INFO L226 Difference]: Without dead ends: 15016 [2022-01-18 16:25:41,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7126 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2588, Invalid=17434, Unknown=0, NotChecked=0, Total=20022 [2022-01-18 16:25:41,420 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 376 mSDsluCounter, 2649 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:41,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 2612 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1711 Invalid, 0 Unknown, 433 Unchecked, 0.9s Time] [2022-01-18 16:25:41,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15016 states. [2022-01-18 16:25:41,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15016 to 8421. [2022-01-18 16:25:41,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8421 states, 8420 states have (on average 2.3) internal successors, (19366), 8420 states have internal predecessors, (19366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:41,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8421 states to 8421 states and 19366 transitions. [2022-01-18 16:25:41,565 INFO L78 Accepts]: Start accepts. Automaton has 8421 states and 19366 transitions. Word has length 39 [2022-01-18 16:25:41,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:41,565 INFO L470 AbstractCegarLoop]: Abstraction has 8421 states and 19366 transitions. [2022-01-18 16:25:41,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:41,565 INFO L276 IsEmpty]: Start isEmpty. Operand 8421 states and 19366 transitions. [2022-01-18 16:25:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:25:41,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:41,569 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:41,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-18 16:25:41,769 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,SelfDestructingSolverStorable79 [2022-01-18 16:25:41,770 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:41,770 INFO L85 PathProgramCache]: Analyzing trace with hash -701560062, now seen corresponding path program 75 times [2022-01-18 16:25:41,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:41,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779331080] [2022-01-18 16:25:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:41,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:42,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:42,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779331080] [2022-01-18 16:25:42,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779331080] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:42,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972509422] [2022-01-18 16:25:42,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:25:42,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:42,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:42,020 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) [2022-01-18 16:25:42,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 16:25:42,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 16:25:42,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:42,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:25:42,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:42,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:42,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:42,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:42,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:42,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:42,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:42,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:42,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:25:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:42,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:44,044 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:25:44,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:25:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:45,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972509422] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:45,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:45,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 41 [2022-01-18 16:25:45,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291871117] [2022-01-18 16:25:45,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:45,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:25:45,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:45,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:25:45,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1424, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:25:45,873 INFO L87 Difference]: Start difference. First operand 8421 states and 19366 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:47,910 INFO L93 Difference]: Finished difference Result 12776 states and 28757 transitions. [2022-01-18 16:25:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:25:47,910 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:25:47,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:47,928 INFO L225 Difference]: With dead ends: 12776 [2022-01-18 16:25:47,928 INFO L226 Difference]: Without dead ends: 12264 [2022-01-18 16:25:47,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=750, Invalid=4800, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 16:25:47,928 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 648 mSDsluCounter, 2204 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:47,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 1587 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1491 Invalid, 0 Unknown, 148 Unchecked, 0.8s Time] [2022-01-18 16:25:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12264 states. [2022-01-18 16:25:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12264 to 9219. [2022-01-18 16:25:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9219 states, 9218 states have (on average 2.305272293339119) internal successors, (21250), 9218 states have internal predecessors, (21250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:48,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9219 states to 9219 states and 21250 transitions. [2022-01-18 16:25:48,058 INFO L78 Accepts]: Start accepts. Automaton has 9219 states and 21250 transitions. Word has length 39 [2022-01-18 16:25:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:48,058 INFO L470 AbstractCegarLoop]: Abstraction has 9219 states and 21250 transitions. [2022-01-18 16:25:48,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 9219 states and 21250 transitions. [2022-01-18 16:25:48,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:25:48,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:48,063 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:48,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:48,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:48,263 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:48,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:48,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1714264178, now seen corresponding path program 76 times [2022-01-18 16:25:48,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:48,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307662762] [2022-01-18 16:25:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:48,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:48,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:48,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307662762] [2022-01-18 16:25:48,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307662762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:48,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729881619] [2022-01-18 16:25:48,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:25:48,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:48,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:48,522 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) [2022-01-18 16:25:48,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 16:25:48,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:25:48,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:48,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:25:48,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:49,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:49,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:49,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:49,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:49,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:49,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:49,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:49,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:25:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:49,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:50,549 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:25:50,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:25:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:51,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729881619] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:51,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:51,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-01-18 16:25:51,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871803934] [2022-01-18 16:25:51,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:51,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:25:51,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:25:51,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1607, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:25:51,728 INFO L87 Difference]: Start difference. First operand 9219 states and 21250 transitions. Second operand has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:54,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:54,780 INFO L93 Difference]: Finished difference Result 17075 states and 38717 transitions. [2022-01-18 16:25:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 16:25:54,781 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:25:54,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:54,804 INFO L225 Difference]: With dead ends: 17075 [2022-01-18 16:25:54,804 INFO L226 Difference]: Without dead ends: 16524 [2022-01-18 16:25:54,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1654, Invalid=9902, Unknown=0, NotChecked=0, Total=11556 [2022-01-18 16:25:54,805 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 595 mSDsluCounter, 2322 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 425 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:54,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 1539 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1487 Invalid, 0 Unknown, 425 Unchecked, 0.8s Time] [2022-01-18 16:25:54,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16524 states. [2022-01-18 16:25:54,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16524 to 7396. [2022-01-18 16:25:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7396 states, 7395 states have (on average 2.2580121703853955) internal successors, (16698), 7395 states have internal predecessors, (16698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7396 states to 7396 states and 16698 transitions. [2022-01-18 16:25:54,937 INFO L78 Accepts]: Start accepts. Automaton has 7396 states and 16698 transitions. Word has length 39 [2022-01-18 16:25:54,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:54,937 INFO L470 AbstractCegarLoop]: Abstraction has 7396 states and 16698 transitions. [2022-01-18 16:25:54,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:54,938 INFO L276 IsEmpty]: Start isEmpty. Operand 7396 states and 16698 transitions. [2022-01-18 16:25:54,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:25:54,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:54,941 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:54,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-18 16:25:55,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:55,154 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:55,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:55,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1206229246, now seen corresponding path program 77 times [2022-01-18 16:25:55,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:55,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937976344] [2022-01-18 16:25:55,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:55,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:55,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:55,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937976344] [2022-01-18 16:25:55,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937976344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:55,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999984331] [2022-01-18 16:25:55,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:25:55,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:55,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:55,419 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:55,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 16:25:55,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 16:25:55,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:55,445 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:25:55,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:01,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:01,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:01,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:01,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:01,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:01,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:01,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:01,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 44 [2022-01-18 16:26:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:01,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:03,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:03,494 INFO L353 Elim1Store]: treesize reduction 83, result has 77.1 percent of original size [2022-01-18 16:26:03,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 57 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 34 case distinctions, treesize of input 124 treesize of output 331 [2022-01-18 16:26:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:04,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999984331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:04,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:04,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-01-18 16:26:04,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592417211] [2022-01-18 16:26:04,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:04,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:26:04,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:04,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:26:04,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1607, Unknown=1, NotChecked=0, Total=1980 [2022-01-18 16:26:04,408 INFO L87 Difference]: Start difference. First operand 7396 states and 16698 transitions. Second operand has 45 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:09,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:09,632 INFO L93 Difference]: Finished difference Result 8120 states and 18145 transitions. [2022-01-18 16:26:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 16:26:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:26:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:09,642 INFO L225 Difference]: With dead ends: 8120 [2022-01-18 16:26:09,642 INFO L226 Difference]: Without dead ends: 8107 [2022-01-18 16:26:09,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=681, Invalid=3608, Unknown=1, NotChecked=0, Total=4290 [2022-01-18 16:26:09,643 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 272 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:09,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1076 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 452 Unchecked, 0.1s Time] [2022-01-18 16:26:09,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8107 states. [2022-01-18 16:26:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8107 to 7707. [2022-01-18 16:26:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 2.252011419672982) internal successors, (17354), 7706 states have internal predecessors, (17354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 17354 transitions. [2022-01-18 16:26:09,725 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 17354 transitions. Word has length 39 [2022-01-18 16:26:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:09,725 INFO L470 AbstractCegarLoop]: Abstraction has 7707 states and 17354 transitions. [2022-01-18 16:26:09,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 17354 transitions. [2022-01-18 16:26:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:26:09,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:09,730 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:09,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-01-18 16:26:09,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-01-18 16:26:09,930 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:09,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:09,931 INFO L85 PathProgramCache]: Analyzing trace with hash -788654638, now seen corresponding path program 78 times [2022-01-18 16:26:09,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:09,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697126931] [2022-01-18 16:26:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:09,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:10,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:10,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697126931] [2022-01-18 16:26:10,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697126931] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:10,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463855449] [2022-01-18 16:26:10,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:26:10,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:10,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:10,225 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:10,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 16:26:10,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 16:26:10,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:10,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-18 16:26:10,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:11,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:11,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:11,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:11,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:11,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:11,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:11,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:11,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 44 [2022-01-18 16:26:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:11,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:12,317 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:26:12,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:26:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:14,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463855449] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:14,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:14,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-01-18 16:26:14,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468683093] [2022-01-18 16:26:14,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:14,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:26:14,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:14,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:26:14,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:26:14,210 INFO L87 Difference]: Start difference. First operand 7707 states and 17354 transitions. Second operand has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:16,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:16,156 INFO L93 Difference]: Finished difference Result 12919 states and 29043 transitions. [2022-01-18 16:26:16,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 16:26:16,156 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:26:16,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:16,176 INFO L225 Difference]: With dead ends: 12919 [2022-01-18 16:26:16,176 INFO L226 Difference]: Without dead ends: 12834 [2022-01-18 16:26:16,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2495 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1255, Invalid=6935, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 16:26:16,177 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 324 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:16,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 1075 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 732 Invalid, 0 Unknown, 176 Unchecked, 0.4s Time] [2022-01-18 16:26:16,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2022-01-18 16:26:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 5357. [2022-01-18 16:26:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5357 states, 5356 states have (on average 2.251493651979089) internal successors, (12059), 5356 states have internal predecessors, (12059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5357 states to 5357 states and 12059 transitions. [2022-01-18 16:26:16,285 INFO L78 Accepts]: Start accepts. Automaton has 5357 states and 12059 transitions. Word has length 39 [2022-01-18 16:26:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:16,285 INFO L470 AbstractCegarLoop]: Abstraction has 5357 states and 12059 transitions. [2022-01-18 16:26:16,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:16,285 INFO L276 IsEmpty]: Start isEmpty. Operand 5357 states and 12059 transitions. [2022-01-18 16:26:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:26:16,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:16,289 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:16,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:16,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:16,503 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:16,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:16,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2087414082, now seen corresponding path program 79 times [2022-01-18 16:26:16,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:16,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186130322] [2022-01-18 16:26:16,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:16,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:16,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:16,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186130322] [2022-01-18 16:26:16,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186130322] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:16,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616102378] [2022-01-18 16:26:16,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:26:16,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:16,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:16,780 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:16,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 16:26:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:16,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:26:16,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:17,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:17,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:17,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:17,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:17,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:17,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:17,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:26:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:17,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:18,883 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:26:18,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:26:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:20,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616102378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:20,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:20,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 42 [2022-01-18 16:26:20,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911471461] [2022-01-18 16:26:20,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:20,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:26:20,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:20,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:26:20,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:26:20,825 INFO L87 Difference]: Start difference. First operand 5357 states and 12059 transitions. Second operand has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:22,985 INFO L93 Difference]: Finished difference Result 8956 states and 19765 transitions. [2022-01-18 16:26:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 16:26:22,985 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:26:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:22,996 INFO L225 Difference]: With dead ends: 8956 [2022-01-18 16:26:22,996 INFO L226 Difference]: Without dead ends: 8462 [2022-01-18 16:26:22,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=896, Invalid=4956, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 16:26:22,997 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 672 mSDsluCounter, 2345 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:22,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 1642 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1605 Invalid, 0 Unknown, 119 Unchecked, 0.8s Time] [2022-01-18 16:26:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8462 states. [2022-01-18 16:26:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8462 to 5762. [2022-01-18 16:26:23,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5762 states, 5761 states have (on average 2.2617601110918244) internal successors, (13030), 5761 states have internal predecessors, (13030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5762 states to 5762 states and 13030 transitions. [2022-01-18 16:26:23,078 INFO L78 Accepts]: Start accepts. Automaton has 5762 states and 13030 transitions. Word has length 39 [2022-01-18 16:26:23,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:23,078 INFO L470 AbstractCegarLoop]: Abstraction has 5762 states and 13030 transitions. [2022-01-18 16:26:23,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand 5762 states and 13030 transitions. [2022-01-18 16:26:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:26:23,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:23,081 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:23,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:23,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:23,282 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:23,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:23,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1582744898, now seen corresponding path program 80 times [2022-01-18 16:26:23,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:23,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149184004] [2022-01-18 16:26:23,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:23,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:23,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:23,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149184004] [2022-01-18 16:26:23,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149184004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:23,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623995716] [2022-01-18 16:26:23,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:26:23,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:23,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:23,575 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:23,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 16:26:23,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:26:23,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:23,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:26:23,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:24,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:24,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:24,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:24,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:24,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:24,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:24,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:26:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:24,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:25,662 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:26:25,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:26:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:27,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623995716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:27,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:27,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-01-18 16:26:27,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030999892] [2022-01-18 16:26:27,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:27,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:26:27,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:27,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:26:27,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1678, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:26:27,191 INFO L87 Difference]: Start difference. First operand 5762 states and 13030 transitions. Second operand has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:29,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:29,257 INFO L93 Difference]: Finished difference Result 8582 states and 19068 transitions. [2022-01-18 16:26:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 16:26:29,258 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:26:29,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:29,270 INFO L225 Difference]: With dead ends: 8582 [2022-01-18 16:26:29,270 INFO L226 Difference]: Without dead ends: 8540 [2022-01-18 16:26:29,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1273, Invalid=7099, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 16:26:29,272 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 350 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:29,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1383 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 947 Invalid, 0 Unknown, 303 Unchecked, 0.5s Time] [2022-01-18 16:26:29,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8540 states. [2022-01-18 16:26:29,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8540 to 6098. [2022-01-18 16:26:29,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6098 states, 6097 states have (on average 2.264556339183205) internal successors, (13807), 6097 states have internal predecessors, (13807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6098 states to 6098 states and 13807 transitions. [2022-01-18 16:26:29,354 INFO L78 Accepts]: Start accepts. Automaton has 6098 states and 13807 transitions. Word has length 39 [2022-01-18 16:26:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:29,354 INFO L470 AbstractCegarLoop]: Abstraction has 6098 states and 13807 transitions. [2022-01-18 16:26:29,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:29,354 INFO L276 IsEmpty]: Start isEmpty. Operand 6098 states and 13807 transitions. [2022-01-18 16:26:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:26:29,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:29,358 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:29,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:29,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-01-18 16:26:29,558 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:29,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:29,559 INFO L85 PathProgramCache]: Analyzing trace with hash 976122898, now seen corresponding path program 81 times [2022-01-18 16:26:29,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:29,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367807357] [2022-01-18 16:26:29,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:29,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:29,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:29,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367807357] [2022-01-18 16:26:29,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367807357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:29,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882463042] [2022-01-18 16:26:29,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:26:29,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:29,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:29,849 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:29,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 16:26:29,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 16:26:29,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:29,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:26:29,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:30,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:30,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:30,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:30,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:30,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:30,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:30,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:26:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:30,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:31,924 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:26:31,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:26:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:33,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882463042] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:33,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:33,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 42 [2022-01-18 16:26:33,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437760064] [2022-01-18 16:26:33,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:33,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:26:33,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:33,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:26:33,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1498, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:26:33,511 INFO L87 Difference]: Start difference. First operand 6098 states and 13807 transitions. Second operand has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:35,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:35,409 INFO L93 Difference]: Finished difference Result 8931 states and 19767 transitions. [2022-01-18 16:26:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:26:35,409 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:26:35,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:35,424 INFO L225 Difference]: With dead ends: 8931 [2022-01-18 16:26:35,424 INFO L226 Difference]: Without dead ends: 8486 [2022-01-18 16:26:35,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=789, Invalid=4467, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:26:35,425 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 569 mSDsluCounter, 2331 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:35,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 1626 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1603 Invalid, 0 Unknown, 173 Unchecked, 0.8s Time] [2022-01-18 16:26:35,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8486 states. [2022-01-18 16:26:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8486 to 6743. [2022-01-18 16:26:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6743 states, 6742 states have (on average 2.262681696825868) internal successors, (15255), 6742 states have internal predecessors, (15255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6743 states to 6743 states and 15255 transitions. [2022-01-18 16:26:35,530 INFO L78 Accepts]: Start accepts. Automaton has 6743 states and 15255 transitions. Word has length 39 [2022-01-18 16:26:35,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:35,531 INFO L470 AbstractCegarLoop]: Abstraction has 6743 states and 15255 transitions. [2022-01-18 16:26:35,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand 6743 states and 15255 transitions. [2022-01-18 16:26:35,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:26:35,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:35,535 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:35,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 16:26:35,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:35,735 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:35,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2100683282, now seen corresponding path program 82 times [2022-01-18 16:26:35,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:35,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563444976] [2022-01-18 16:26:35,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:35,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:36,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:36,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563444976] [2022-01-18 16:26:36,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563444976] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:36,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470929551] [2022-01-18 16:26:36,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:26:36,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:36,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:36,033 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:36,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 16:26:36,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:26:36,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:36,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:26:36,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:36,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:36,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:36,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:36,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:36,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:36,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:36,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:36,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:26:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:36,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:38,090 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:26:38,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:26:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:39,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470929551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:39,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:39,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-01-18 16:26:39,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995423661] [2022-01-18 16:26:39,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:39,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:26:39,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:39,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:26:39,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1587, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:26:39,411 INFO L87 Difference]: Start difference. First operand 6743 states and 15255 transitions. Second operand has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:41,467 INFO L93 Difference]: Finished difference Result 12342 states and 27425 transitions. [2022-01-18 16:26:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 16:26:41,467 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:26:41,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:41,484 INFO L225 Difference]: With dead ends: 12342 [2022-01-18 16:26:41,485 INFO L226 Difference]: Without dead ends: 12080 [2022-01-18 16:26:41,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1068, Invalid=6414, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 16:26:41,485 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 437 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:41,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 1278 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1032 Invalid, 0 Unknown, 228 Unchecked, 0.6s Time] [2022-01-18 16:26:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2022-01-18 16:26:41,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 6527. [2022-01-18 16:26:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6527 states, 6526 states have (on average 2.265093472264787) internal successors, (14782), 6526 states have internal predecessors, (14782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6527 states to 6527 states and 14782 transitions. [2022-01-18 16:26:41,593 INFO L78 Accepts]: Start accepts. Automaton has 6527 states and 14782 transitions. Word has length 39 [2022-01-18 16:26:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:41,594 INFO L470 AbstractCegarLoop]: Abstraction has 6527 states and 14782 transitions. [2022-01-18 16:26:41,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 6527 states and 14782 transitions. [2022-01-18 16:26:41,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:26:41,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:41,597 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:41,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:41,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:41,798 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:41,798 INFO L85 PathProgramCache]: Analyzing trace with hash 471453714, now seen corresponding path program 83 times [2022-01-18 16:26:41,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:41,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723142488] [2022-01-18 16:26:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:41,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:42,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:42,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723142488] [2022-01-18 16:26:42,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723142488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:42,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137977503] [2022-01-18 16:26:42,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:26:42,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:42,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:42,094 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:42,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 16:26:42,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 16:26:42,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:42,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-18 16:26:42,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:42,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:42,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:42,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:42,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:42,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:42,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:42,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:42,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:42,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 32 [2022-01-18 16:26:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:42,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:43,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:43,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:43,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 372 [2022-01-18 16:26:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:44,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137977503] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:44,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:44,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-01-18 16:26:44,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148888113] [2022-01-18 16:26:44,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:44,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-18 16:26:44,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:44,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-18 16:26:44,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=1744, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:26:44,451 INFO L87 Difference]: Start difference. First operand 6527 states and 14782 transitions. Second operand has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:49,589 INFO L93 Difference]: Finished difference Result 9781 states and 21718 transitions. [2022-01-18 16:26:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 16:26:49,590 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:26:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:49,602 INFO L225 Difference]: With dead ends: 9781 [2022-01-18 16:26:49,602 INFO L226 Difference]: Without dead ends: 9498 [2022-01-18 16:26:49,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4107 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2153, Invalid=10729, Unknown=0, NotChecked=0, Total=12882 [2022-01-18 16:26:49,603 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 544 mSDsluCounter, 2064 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:49,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 1667 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1290 Invalid, 0 Unknown, 274 Unchecked, 0.9s Time] [2022-01-18 16:26:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9498 states. [2022-01-18 16:26:49,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9498 to 7128. [2022-01-18 16:26:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 7127 states have (on average 2.267574014311772) internal successors, (16161), 7127 states have internal predecessors, (16161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 16161 transitions. [2022-01-18 16:26:49,692 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 16161 transitions. Word has length 39 [2022-01-18 16:26:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:49,692 INFO L470 AbstractCegarLoop]: Abstraction has 7128 states and 16161 transitions. [2022-01-18 16:26:49,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 16161 transitions. [2022-01-18 16:26:49,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:26:49,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:49,696 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:49,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:49,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-01-18 16:26:49,897 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:49,897 INFO L85 PathProgramCache]: Analyzing trace with hash 130470786, now seen corresponding path program 84 times [2022-01-18 16:26:49,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:49,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114505858] [2022-01-18 16:26:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:49,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:50,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:50,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114505858] [2022-01-18 16:26:50,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114505858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:50,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912888673] [2022-01-18 16:26:50,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:26:50,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:50,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:50,199 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:50,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 16:26:50,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:26:50,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:50,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-18 16:26:50,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:51,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:51,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:51,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:51,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:51,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:51,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:51,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:51,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 44 [2022-01-18 16:26:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:51,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:52,257 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:26:52,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:26:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:53,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912888673] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:53,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:53,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-01-18 16:26:53,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966512873] [2022-01-18 16:26:53,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:53,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:26:53,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:53,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:26:53,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1668, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:26:53,281 INFO L87 Difference]: Start difference. First operand 7128 states and 16161 transitions. Second operand has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:54,958 INFO L93 Difference]: Finished difference Result 10175 states and 22746 transitions. [2022-01-18 16:26:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 16:26:54,958 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:26:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:54,971 INFO L225 Difference]: With dead ends: 10175 [2022-01-18 16:26:54,971 INFO L226 Difference]: Without dead ends: 10138 [2022-01-18 16:26:54,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1949 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=923, Invalid=6049, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 16:26:54,972 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 344 mSDsluCounter, 1418 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:54,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 1392 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 973 Invalid, 0 Unknown, 310 Unchecked, 0.5s Time] [2022-01-18 16:26:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10138 states. [2022-01-18 16:26:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10138 to 7107. [2022-01-18 16:26:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7107 states, 7106 states have (on average 2.267098226850549) internal successors, (16110), 7106 states have internal predecessors, (16110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7107 states to 7107 states and 16110 transitions. [2022-01-18 16:26:55,065 INFO L78 Accepts]: Start accepts. Automaton has 7107 states and 16110 transitions. Word has length 39 [2022-01-18 16:26:55,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:55,065 INFO L470 AbstractCegarLoop]: Abstraction has 7107 states and 16110 transitions. [2022-01-18 16:26:55,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:55,065 INFO L276 IsEmpty]: Start isEmpty. Operand 7107 states and 16110 transitions. [2022-01-18 16:26:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:26:55,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:55,069 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:55,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:55,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:55,269 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:55,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:55,269 INFO L85 PathProgramCache]: Analyzing trace with hash -2088252302, now seen corresponding path program 85 times [2022-01-18 16:26:55,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:55,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563905581] [2022-01-18 16:26:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:55,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:55,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:55,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563905581] [2022-01-18 16:26:55,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563905581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:55,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943586103] [2022-01-18 16:26:55,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:26:55,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:55,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:55,631 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:55,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 16:26:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:55,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:26:55,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:56,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:56,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:56,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:56,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:56,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:56,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:56,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:26:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:56,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:57,655 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:26:57,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:26:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:58,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943586103] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:58,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:58,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2022-01-18 16:26:58,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387811782] [2022-01-18 16:26:58,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:58,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:26:58,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:58,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:26:58,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:26:58,915 INFO L87 Difference]: Start difference. First operand 7107 states and 16110 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:00,975 INFO L93 Difference]: Finished difference Result 13150 states and 29651 transitions. [2022-01-18 16:27:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 16:27:00,976 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:27:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:01,018 INFO L225 Difference]: With dead ends: 13150 [2022-01-18 16:27:01,018 INFO L226 Difference]: Without dead ends: 12710 [2022-01-18 16:27:01,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2264 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1268, Invalid=6388, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 16:27:01,018 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 472 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:01,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 1338 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1048 Invalid, 0 Unknown, 374 Unchecked, 0.6s Time] [2022-01-18 16:27:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12710 states. [2022-01-18 16:27:01,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12710 to 4841. [2022-01-18 16:27:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4841 states, 4840 states have (on average 2.2264462809917354) internal successors, (10776), 4840 states have internal predecessors, (10776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4841 states to 4841 states and 10776 transitions. [2022-01-18 16:27:01,092 INFO L78 Accepts]: Start accepts. Automaton has 4841 states and 10776 transitions. Word has length 39 [2022-01-18 16:27:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:01,092 INFO L470 AbstractCegarLoop]: Abstraction has 4841 states and 10776 transitions. [2022-01-18 16:27:01,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4841 states and 10776 transitions. [2022-01-18 16:27:01,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:27:01,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:01,095 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:01,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 16:27:01,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:01,296 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:01,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1095423810, now seen corresponding path program 86 times [2022-01-18 16:27:01,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:01,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862031563] [2022-01-18 16:27:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:01,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:01,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:01,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862031563] [2022-01-18 16:27:01,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862031563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:01,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529334057] [2022-01-18 16:27:01,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:27:01,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:01,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:01,604 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:01,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 16:27:01,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:27:01,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:01,626 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:27:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:02,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:02,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:02,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:02,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:02,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:02,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:27:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:02,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:03,634 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:27:03,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:27:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:04,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529334057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:04,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:04,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2022-01-18 16:27:04,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367685418] [2022-01-18 16:27:04,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:04,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:27:04,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:04,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:27:04,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:27:04,677 INFO L87 Difference]: Start difference. First operand 4841 states and 10776 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:07,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:07,784 INFO L93 Difference]: Finished difference Result 10258 states and 22574 transitions. [2022-01-18 16:27:07,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-18 16:27:07,785 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:27:07,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:07,801 INFO L225 Difference]: With dead ends: 10258 [2022-01-18 16:27:07,801 INFO L226 Difference]: Without dead ends: 10072 [2022-01-18 16:27:07,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3504 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1882, Invalid=9890, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 16:27:07,803 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 440 mSDsluCounter, 2125 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 621 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:07,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 1861 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1330 Invalid, 0 Unknown, 621 Unchecked, 0.7s Time] [2022-01-18 16:27:07,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2022-01-18 16:27:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 4872. [2022-01-18 16:27:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4872 states, 4871 states have (on average 2.2311640320262778) internal successors, (10868), 4871 states have internal predecessors, (10868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:07,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 10868 transitions. [2022-01-18 16:27:07,899 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 10868 transitions. Word has length 39 [2022-01-18 16:27:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:07,899 INFO L470 AbstractCegarLoop]: Abstraction has 4872 states and 10868 transitions. [2022-01-18 16:27:07,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:07,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 10868 transitions. [2022-01-18 16:27:07,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:27:07,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:07,902 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:07,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:08,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:08,103 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:08,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:08,103 INFO L85 PathProgramCache]: Analyzing trace with hash 754440882, now seen corresponding path program 87 times [2022-01-18 16:27:08,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:08,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237753670] [2022-01-18 16:27:08,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:08,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:08,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:08,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237753670] [2022-01-18 16:27:08,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237753670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:08,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514796244] [2022-01-18 16:27:08,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:27:08,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:08,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:08,430 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:08,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 16:27:08,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 16:27:08,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:08,454 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:27:08,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:09,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:09,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:09,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:09,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:09,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:09,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:09,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:27:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:09,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:10,567 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:27:10,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:27:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:11,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514796244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:11,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:11,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2022-01-18 16:27:11,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159129131] [2022-01-18 16:27:11,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:11,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:27:11,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:11,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:27:11,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1589, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:27:11,941 INFO L87 Difference]: Start difference. First operand 4872 states and 10868 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:16,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:16,344 INFO L93 Difference]: Finished difference Result 8395 states and 18450 transitions. [2022-01-18 16:27:16,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-18 16:27:16,345 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:27:16,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:16,354 INFO L225 Difference]: With dead ends: 8395 [2022-01-18 16:27:16,354 INFO L226 Difference]: Without dead ends: 8352 [2022-01-18 16:27:16,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6258 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2905, Invalid=16555, Unknown=0, NotChecked=0, Total=19460 [2022-01-18 16:27:16,356 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 311 mSDsluCounter, 2964 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 3013 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 501 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:16,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 3013 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1890 Invalid, 0 Unknown, 501 Unchecked, 1.0s Time] [2022-01-18 16:27:16,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2022-01-18 16:27:16,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 5094. [2022-01-18 16:27:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 5093 states have (on average 2.234243078735519) internal successors, (11379), 5093 states have internal predecessors, (11379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 11379 transitions. [2022-01-18 16:27:16,418 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 11379 transitions. Word has length 39 [2022-01-18 16:27:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:16,418 INFO L470 AbstractCegarLoop]: Abstraction has 5094 states and 11379 transitions. [2022-01-18 16:27:16,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:16,418 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 11379 transitions. [2022-01-18 16:27:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:27:16,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:16,421 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:16,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:16,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-01-18 16:27:16,621 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:16,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:16,622 INFO L85 PathProgramCache]: Analyzing trace with hash -13136430, now seen corresponding path program 88 times [2022-01-18 16:27:16,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:16,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164989861] [2022-01-18 16:27:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:16,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:16,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:16,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164989861] [2022-01-18 16:27:16,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164989861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:16,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839502634] [2022-01-18 16:27:16,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:27:16,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:16,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:16,910 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:16,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 16:27:16,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:27:16,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:16,933 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:27:16,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:17,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:17,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:17,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:17,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:17,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:27:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:17,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:18,861 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:27:18,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:27:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:20,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839502634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:20,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:20,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-01-18 16:27:20,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811760405] [2022-01-18 16:27:20,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:20,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:27:20,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:20,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:27:20,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:27:20,655 INFO L87 Difference]: Start difference. First operand 5094 states and 11379 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:22,894 INFO L93 Difference]: Finished difference Result 8478 states and 18545 transitions. [2022-01-18 16:27:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 16:27:22,894 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:27:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:22,904 INFO L225 Difference]: With dead ends: 8478 [2022-01-18 16:27:22,904 INFO L226 Difference]: Without dead ends: 7975 [2022-01-18 16:27:22,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=814, Invalid=4588, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:27:22,905 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 562 mSDsluCounter, 2745 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:22,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1946 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1809 Invalid, 0 Unknown, 143 Unchecked, 0.9s Time] [2022-01-18 16:27:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7975 states. [2022-01-18 16:27:22,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7975 to 5874. [2022-01-18 16:27:22,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5874 states, 5873 states have (on average 2.239570917759237) internal successors, (13153), 5873 states have internal predecessors, (13153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5874 states to 5874 states and 13153 transitions. [2022-01-18 16:27:22,979 INFO L78 Accepts]: Start accepts. Automaton has 5874 states and 13153 transitions. Word has length 39 [2022-01-18 16:27:22,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:22,979 INFO L470 AbstractCegarLoop]: Abstraction has 5874 states and 13153 transitions. [2022-01-18 16:27:22,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:22,979 INFO L276 IsEmpty]: Start isEmpty. Operand 5874 states and 13153 transitions. [2022-01-18 16:27:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:27:22,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:22,983 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:22,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:23,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:23,183 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:23,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:23,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1892279486, now seen corresponding path program 89 times [2022-01-18 16:27:23,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:23,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555574971] [2022-01-18 16:27:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:23,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:27:23,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:23,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555574971] [2022-01-18 16:27:23,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555574971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:23,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434460177] [2022-01-18 16:27:23,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:27:23,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:23,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:23,525 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:23,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 16:27:23,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 16:27:23,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:23,550 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-18 16:27:23,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:24,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:24,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:24,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:24,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:24,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:24,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2022-01-18 16:27:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:24,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:25,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:25,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:27:25,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 372 [2022-01-18 16:27:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:25,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434460177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:25,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:25,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 42 [2022-01-18 16:27:25,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870798058] [2022-01-18 16:27:25,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:25,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:27:25,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:25,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:27:25,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1373, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:27:25,870 INFO L87 Difference]: Start difference. First operand 5874 states and 13153 transitions. Second operand has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:29,706 INFO L93 Difference]: Finished difference Result 10878 states and 23605 transitions. [2022-01-18 16:27:29,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 16:27:29,707 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:27:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:29,720 INFO L225 Difference]: With dead ends: 10878 [2022-01-18 16:27:29,720 INFO L226 Difference]: Without dead ends: 10238 [2022-01-18 16:27:29,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2353 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1557, Invalid=6453, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 16:27:29,721 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 658 mSDsluCounter, 2693 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 413 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:29,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 1866 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1522 Invalid, 0 Unknown, 413 Unchecked, 0.9s Time] [2022-01-18 16:27:29,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10238 states. [2022-01-18 16:27:29,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10238 to 6965. [2022-01-18 16:27:29,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6965 states, 6964 states have (on average 2.2501435956346927) internal successors, (15670), 6964 states have internal predecessors, (15670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6965 states to 6965 states and 15670 transitions. [2022-01-18 16:27:29,826 INFO L78 Accepts]: Start accepts. Automaton has 6965 states and 15670 transitions. Word has length 39 [2022-01-18 16:27:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:29,827 INFO L470 AbstractCegarLoop]: Abstraction has 6965 states and 15670 transitions. [2022-01-18 16:27:29,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 6965 states and 15670 transitions. [2022-01-18 16:27:29,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:27:29,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:29,831 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:29,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:30,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:30,047 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:30,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:30,048 INFO L85 PathProgramCache]: Analyzing trace with hash -517805614, now seen corresponding path program 90 times [2022-01-18 16:27:30,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:30,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495587724] [2022-01-18 16:27:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:30,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:30,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:30,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495587724] [2022-01-18 16:27:30,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495587724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:30,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347603377] [2022-01-18 16:27:30,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:27:30,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:30,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:30,350 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:30,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 16:27:30,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:27:30,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:30,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:27:30,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:31,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:31,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:31,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:31,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:31,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:31,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:27:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:31,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:32,327 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:27:32,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:27:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:33,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347603377] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:33,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:33,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2022-01-18 16:27:33,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024653994] [2022-01-18 16:27:33,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:33,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:27:33,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:33,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:27:33,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:27:33,666 INFO L87 Difference]: Start difference. First operand 6965 states and 15670 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:35,794 INFO L93 Difference]: Finished difference Result 12330 states and 27409 transitions. [2022-01-18 16:27:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:27:35,794 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:27:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:35,808 INFO L225 Difference]: With dead ends: 12330 [2022-01-18 16:27:35,808 INFO L226 Difference]: Without dead ends: 11928 [2022-01-18 16:27:35,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1213, Invalid=5927, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 16:27:35,809 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 462 mSDsluCounter, 2549 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 2191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 687 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:35,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 1795 Invalid, 2191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1417 Invalid, 0 Unknown, 687 Unchecked, 0.7s Time] [2022-01-18 16:27:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11928 states. [2022-01-18 16:27:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11928 to 6186. [2022-01-18 16:27:35,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6186 states, 6185 states have (on average 2.242198868229588) internal successors, (13868), 6185 states have internal predecessors, (13868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6186 states to 6186 states and 13868 transitions. [2022-01-18 16:27:35,905 INFO L78 Accepts]: Start accepts. Automaton has 6186 states and 13868 transitions. Word has length 39 [2022-01-18 16:27:35,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:35,905 INFO L470 AbstractCegarLoop]: Abstraction has 6186 states and 13868 transitions. [2022-01-18 16:27:35,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 6186 states and 13868 transitions. [2022-01-18 16:27:35,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:27:35,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:35,909 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:35,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:36,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:36,109 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:36,109 INFO L85 PathProgramCache]: Analyzing trace with hash -858788542, now seen corresponding path program 91 times [2022-01-18 16:27:36,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:36,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006652879] [2022-01-18 16:27:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:36,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:36,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:36,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006652879] [2022-01-18 16:27:36,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006652879] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:36,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341704937] [2022-01-18 16:27:36,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:27:36,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:36,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:36,434 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:36,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 16:27:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:36,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:27:36,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:37,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:37,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:37,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:37,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:37,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:27:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:37,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:38,447 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:27:38,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:27:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:39,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341704937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:39,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:39,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2022-01-18 16:27:39,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385607668] [2022-01-18 16:27:39,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:39,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:27:39,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:39,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:27:39,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:27:39,973 INFO L87 Difference]: Start difference. First operand 6186 states and 13868 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:41,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:41,624 INFO L93 Difference]: Finished difference Result 10931 states and 24305 transitions. [2022-01-18 16:27:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:27:41,624 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:27:41,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:41,637 INFO L225 Difference]: With dead ends: 10931 [2022-01-18 16:27:41,637 INFO L226 Difference]: Without dead ends: 10874 [2022-01-18 16:27:41,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=930, Invalid=5076, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:27:41,638 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 317 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:41,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 1259 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 841 Invalid, 0 Unknown, 433 Unchecked, 0.5s Time] [2022-01-18 16:27:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10874 states. [2022-01-18 16:27:41,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10874 to 6523. [2022-01-18 16:27:41,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6523 states, 6522 states have (on average 2.242256976387611) internal successors, (14624), 6522 states have internal predecessors, (14624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6523 states to 6523 states and 14624 transitions. [2022-01-18 16:27:41,735 INFO L78 Accepts]: Start accepts. Automaton has 6523 states and 14624 transitions. Word has length 39 [2022-01-18 16:27:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:41,735 INFO L470 AbstractCegarLoop]: Abstraction has 6523 states and 14624 transitions. [2022-01-18 16:27:41,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:41,735 INFO L276 IsEmpty]: Start isEmpty. Operand 6523 states and 14624 transitions. [2022-01-18 16:27:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:27:41,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:41,739 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:41,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 16:27:41,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:41,939 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:41,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:41,940 INFO L85 PathProgramCache]: Analyzing trace with hash -798877582, now seen corresponding path program 92 times [2022-01-18 16:27:41,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:41,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615162191] [2022-01-18 16:27:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:41,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:42,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:42,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615162191] [2022-01-18 16:27:42,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615162191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:42,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270347042] [2022-01-18 16:27:42,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:27:42,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:42,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:42,248 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:42,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 16:27:42,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:27:42,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:42,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:27:42,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:42,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:42,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:42,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:42,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:42,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:27:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:43,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:44,208 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:27:44,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:27:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:45,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270347042] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:45,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:45,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2022-01-18 16:27:45,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107057954] [2022-01-18 16:27:45,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:45,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:27:45,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:27:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1440, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:27:45,233 INFO L87 Difference]: Start difference. First operand 6523 states and 14624 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:47,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:47,561 INFO L93 Difference]: Finished difference Result 12412 states and 27599 transitions. [2022-01-18 16:27:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 16:27:47,561 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:27:47,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:47,577 INFO L225 Difference]: With dead ends: 12412 [2022-01-18 16:27:47,577 INFO L226 Difference]: Without dead ends: 12365 [2022-01-18 16:27:47,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1588, Invalid=8312, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 16:27:47,579 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 339 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:47,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 1447 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 943 Invalid, 0 Unknown, 355 Unchecked, 0.5s Time] [2022-01-18 16:27:47,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12365 states. [2022-01-18 16:27:47,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12365 to 7081. [2022-01-18 16:27:47,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7081 states, 7080 states have (on average 2.239689265536723) internal successors, (15857), 7080 states have internal predecessors, (15857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7081 states to 7081 states and 15857 transitions. [2022-01-18 16:27:47,688 INFO L78 Accepts]: Start accepts. Automaton has 7081 states and 15857 transitions. Word has length 39 [2022-01-18 16:27:47,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:47,689 INFO L470 AbstractCegarLoop]: Abstraction has 7081 states and 15857 transitions. [2022-01-18 16:27:47,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 7081 states and 15857 transitions. [2022-01-18 16:27:47,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:27:47,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:47,692 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:47,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:47,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-01-18 16:27:47,893 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:47,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:47,893 INFO L85 PathProgramCache]: Analyzing trace with hash -691098734, now seen corresponding path program 93 times [2022-01-18 16:27:47,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:47,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631645758] [2022-01-18 16:27:47,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:47,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:48,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:48,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631645758] [2022-01-18 16:27:48,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631645758] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:48,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676938049] [2022-01-18 16:27:48,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:27:48,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:48,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:48,186 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:48,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 16:27:48,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-18 16:27:48,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:48,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:27:48,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:48,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:48,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:48,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:48,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:27:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:48,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:50,048 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:27:50,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:27:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:51,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676938049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:51,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:51,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 38 [2022-01-18 16:27:51,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623203294] [2022-01-18 16:27:51,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:51,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:27:51,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:51,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:27:51,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:27:51,435 INFO L87 Difference]: Start difference. First operand 7081 states and 15857 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:53,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:53,071 INFO L93 Difference]: Finished difference Result 11193 states and 24627 transitions. [2022-01-18 16:27:53,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 16:27:53,072 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:27:53,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:53,086 INFO L225 Difference]: With dead ends: 11193 [2022-01-18 16:27:53,086 INFO L226 Difference]: Without dead ends: 10775 [2022-01-18 16:27:53,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=642, Invalid=3264, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 16:27:53,087 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 620 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:53,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 1382 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1271 Invalid, 0 Unknown, 108 Unchecked, 0.7s Time] [2022-01-18 16:27:53,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10775 states. [2022-01-18 16:27:53,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10775 to 7552. [2022-01-18 16:27:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7552 states, 7551 states have (on average 2.243543901470004) internal successors, (16941), 7551 states have internal predecessors, (16941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7552 states to 7552 states and 16941 transitions. [2022-01-18 16:27:53,201 INFO L78 Accepts]: Start accepts. Automaton has 7552 states and 16941 transitions. Word has length 39 [2022-01-18 16:27:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:53,201 INFO L470 AbstractCegarLoop]: Abstraction has 7552 states and 16941 transitions. [2022-01-18 16:27:53,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 7552 states and 16941 transitions. [2022-01-18 16:27:53,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:27:53,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:53,205 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:53,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-18 16:27:53,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-01-18 16:27:53,405 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:53,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:53,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1216638574, now seen corresponding path program 94 times [2022-01-18 16:27:53,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:53,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780629084] [2022-01-18 16:27:53,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:53,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:53,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:53,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780629084] [2022-01-18 16:27:53,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780629084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:53,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305770204] [2022-01-18 16:27:53,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:27:53,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:53,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:53,687 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:53,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 16:27:53,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:27:53,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:53,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:27:53,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:54,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:54,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:54,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:27:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:54,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:55,571 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:27:55,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:27:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:56,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305770204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:56,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:56,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 38 [2022-01-18 16:27:56,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130702716] [2022-01-18 16:27:56,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:56,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:27:56,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:56,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:27:56,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:27:56,860 INFO L87 Difference]: Start difference. First operand 7552 states and 16941 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:58,749 INFO L93 Difference]: Finished difference Result 12346 states and 27336 transitions. [2022-01-18 16:27:58,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:27:58,749 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:27:58,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:58,771 INFO L225 Difference]: With dead ends: 12346 [2022-01-18 16:27:58,771 INFO L226 Difference]: Without dead ends: 11712 [2022-01-18 16:27:58,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=757, Invalid=3935, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:27:58,771 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 611 mSDsluCounter, 2131 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:58,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 1545 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1466 Invalid, 0 Unknown, 96 Unchecked, 0.7s Time] [2022-01-18 16:27:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11712 states. [2022-01-18 16:27:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11712 to 7834. [2022-01-18 16:27:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7834 states, 7833 states have (on average 2.248563768671007) internal successors, (17613), 7833 states have internal predecessors, (17613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7834 states to 7834 states and 17613 transitions. [2022-01-18 16:27:58,914 INFO L78 Accepts]: Start accepts. Automaton has 7834 states and 17613 transitions. Word has length 39 [2022-01-18 16:27:58,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:58,914 INFO L470 AbstractCegarLoop]: Abstraction has 7834 states and 17613 transitions. [2022-01-18 16:27:58,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 7834 states and 17613 transitions. [2022-01-18 16:27:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:27:58,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:58,919 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:58,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:59,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-01-18 16:27:59,135 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:59,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:59,135 INFO L85 PathProgramCache]: Analyzing trace with hash 545716114, now seen corresponding path program 95 times [2022-01-18 16:27:59,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:59,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735761762] [2022-01-18 16:27:59,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:59,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:59,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:59,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735761762] [2022-01-18 16:27:59,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735761762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:59,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444204096] [2022-01-18 16:27:59,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:27:59,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:59,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:59,432 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:59,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 16:27:59,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 16:27:59,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:59,460 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-18 16:27:59,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:00,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:00,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2022-01-18 16:28:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:00,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:00,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:00,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:28:00,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 372 [2022-01-18 16:28:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:01,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444204096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:01,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:01,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 39 [2022-01-18 16:28:01,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464071315] [2022-01-18 16:28:01,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:01,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:28:01,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:01,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:28:01,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:28:01,584 INFO L87 Difference]: Start difference. First operand 7834 states and 17613 transitions. Second operand has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:04,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:04,173 INFO L93 Difference]: Finished difference Result 14263 states and 31520 transitions. [2022-01-18 16:28:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 16:28:04,174 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:28:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:04,194 INFO L225 Difference]: With dead ends: 14263 [2022-01-18 16:28:04,194 INFO L226 Difference]: Without dead ends: 13773 [2022-01-18 16:28:04,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1093, Invalid=4163, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:28:04,194 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 721 mSDsluCounter, 1796 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:04,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 1290 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1231 Invalid, 0 Unknown, 114 Unchecked, 0.8s Time] [2022-01-18 16:28:04,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13773 states. [2022-01-18 16:28:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13773 to 9478. [2022-01-18 16:28:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9478 states, 9477 states have (on average 2.245858394006542) internal successors, (21284), 9477 states have internal predecessors, (21284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9478 states to 9478 states and 21284 transitions. [2022-01-18 16:28:04,338 INFO L78 Accepts]: Start accepts. Automaton has 9478 states and 21284 transitions. Word has length 39 [2022-01-18 16:28:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:04,338 INFO L470 AbstractCegarLoop]: Abstraction has 9478 states and 21284 transitions. [2022-01-18 16:28:04,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 9478 states and 21284 transitions. [2022-01-18 16:28:04,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:28:04,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:04,343 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:04,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:04,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:04,558 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:04,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:04,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1835060478, now seen corresponding path program 96 times [2022-01-18 16:28:04,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:04,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216145663] [2022-01-18 16:28:04,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:04,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:04,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:04,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216145663] [2022-01-18 16:28:04,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216145663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:04,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203168706] [2022-01-18 16:28:04,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:28:04,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:04,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:04,860 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:04,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 16:28:04,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:28:04,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:04,883 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-18 16:28:04,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:05,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:05,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:05,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:05,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 44 [2022-01-18 16:28:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:05,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:06,793 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:28:06,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:28:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:07,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203168706] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:07,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:07,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 38 [2022-01-18 16:28:07,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436414237] [2022-01-18 16:28:07,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:07,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:28:07,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:07,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:28:07,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1228, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:28:07,993 INFO L87 Difference]: Start difference. First operand 9478 states and 21284 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:10,273 INFO L93 Difference]: Finished difference Result 16669 states and 37110 transitions. [2022-01-18 16:28:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:28:10,273 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:28:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:10,299 INFO L225 Difference]: With dead ends: 16669 [2022-01-18 16:28:10,299 INFO L226 Difference]: Without dead ends: 16504 [2022-01-18 16:28:10,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1098, Invalid=5874, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 16:28:10,300 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 434 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:10,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 1553 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1289 Invalid, 0 Unknown, 144 Unchecked, 0.7s Time] [2022-01-18 16:28:10,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16504 states. [2022-01-18 16:28:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16504 to 9914. [2022-01-18 16:28:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9914 states, 9913 states have (on average 2.255321295268839) internal successors, (22357), 9913 states have internal predecessors, (22357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9914 states to 9914 states and 22357 transitions. [2022-01-18 16:28:10,475 INFO L78 Accepts]: Start accepts. Automaton has 9914 states and 22357 transitions. Word has length 39 [2022-01-18 16:28:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:10,475 INFO L470 AbstractCegarLoop]: Abstraction has 9914 states and 22357 transitions. [2022-01-18 16:28:10,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 9914 states and 22357 transitions. [2022-01-18 16:28:10,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:28:10,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:10,480 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:10,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:10,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-01-18 16:28:10,681 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:10,681 INFO L85 PathProgramCache]: Analyzing trace with hash -299935998, now seen corresponding path program 97 times [2022-01-18 16:28:10,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:10,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016969576] [2022-01-18 16:28:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:10,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:10,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:10,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016969576] [2022-01-18 16:28:10,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016969576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:10,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584273012] [2022-01-18 16:28:10,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:28:10,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:10,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:10,993 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:10,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 16:28:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:11,023 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:28:11,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:11,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:11,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:28:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:11,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:12,923 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:28:12,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:28:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:14,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584273012] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:14,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:14,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 40 [2022-01-18 16:28:14,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955786255] [2022-01-18 16:28:14,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:14,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:28:14,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:14,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:28:14,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:28:14,257 INFO L87 Difference]: Start difference. First operand 9914 states and 22357 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:16,302 INFO L93 Difference]: Finished difference Result 14690 states and 32820 transitions. [2022-01-18 16:28:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:28:16,302 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:28:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:16,322 INFO L225 Difference]: With dead ends: 14690 [2022-01-18 16:28:16,322 INFO L226 Difference]: Without dead ends: 14626 [2022-01-18 16:28:16,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1205, Invalid=6627, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 16:28:16,324 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 357 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 625 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:16,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 1647 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1068 Invalid, 0 Unknown, 625 Unchecked, 0.5s Time] [2022-01-18 16:28:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14626 states. [2022-01-18 16:28:16,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14626 to 10106. [2022-01-18 16:28:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10106 states, 10105 states have (on average 2.25531914893617) internal successors, (22790), 10105 states have internal predecessors, (22790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10106 states to 10106 states and 22790 transitions. [2022-01-18 16:28:16,487 INFO L78 Accepts]: Start accepts. Automaton has 10106 states and 22790 transitions. Word has length 39 [2022-01-18 16:28:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:16,487 INFO L470 AbstractCegarLoop]: Abstraction has 10106 states and 22790 transitions. [2022-01-18 16:28:16,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 10106 states and 22790 transitions. [2022-01-18 16:28:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:28:16,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:16,492 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:16,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:16,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:16,692 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:16,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:16,694 INFO L85 PathProgramCache]: Analyzing trace with hash 455427778, now seen corresponding path program 98 times [2022-01-18 16:28:16,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:16,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775888763] [2022-01-18 16:28:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:16,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:16,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:16,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775888763] [2022-01-18 16:28:16,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775888763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:16,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943465481] [2022-01-18 16:28:16,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:28:16,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:16,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:16,990 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:16,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 16:28:17,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:28:17,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:17,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:28:17,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:17,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:17,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:28:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:17,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:18,863 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:28:18,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:28:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:20,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943465481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:20,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:20,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 37 [2022-01-18 16:28:20,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340238960] [2022-01-18 16:28:20,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:20,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:28:20,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:20,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:28:20,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1156, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:28:20,510 INFO L87 Difference]: Start difference. First operand 10106 states and 22790 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:22,262 INFO L93 Difference]: Finished difference Result 12375 states and 27512 transitions. [2022-01-18 16:28:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:28:22,262 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:28:22,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:22,278 INFO L225 Difference]: With dead ends: 12375 [2022-01-18 16:28:22,278 INFO L226 Difference]: Without dead ends: 12019 [2022-01-18 16:28:22,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=607, Invalid=3053, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:28:22,279 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 472 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:22,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 1826 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1788 Invalid, 0 Unknown, 158 Unchecked, 0.9s Time] [2022-01-18 16:28:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12019 states. [2022-01-18 16:28:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12019 to 10587. [2022-01-18 16:28:22,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10587 states, 10586 states have (on average 2.2577933119214055) internal successors, (23901), 10586 states have internal predecessors, (23901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 23901 transitions. [2022-01-18 16:28:22,414 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 23901 transitions. Word has length 39 [2022-01-18 16:28:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:22,414 INFO L470 AbstractCegarLoop]: Abstraction has 10587 states and 23901 transitions. [2022-01-18 16:28:22,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:22,415 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 23901 transitions. [2022-01-18 16:28:22,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:28:22,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:22,420 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:22,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:22,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 16:28:22,620 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1925348814, now seen corresponding path program 99 times [2022-01-18 16:28:22,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:22,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115534177] [2022-01-18 16:28:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:22,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:22,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:22,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115534177] [2022-01-18 16:28:22,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115534177] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:22,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085791514] [2022-01-18 16:28:22,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:28:22,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:22,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:22,934 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:22,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 16:28:22,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 16:28:22,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:22,958 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:28:22,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:23,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:23,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:23,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:28:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:23,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:24,834 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:28:24,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:28:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:26,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085791514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:26,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:26,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 37 [2022-01-18 16:28:26,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552610668] [2022-01-18 16:28:26,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:26,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:28:26,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:26,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:28:26,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:28:26,117 INFO L87 Difference]: Start difference. First operand 10587 states and 23901 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:27,592 INFO L93 Difference]: Finished difference Result 14773 states and 32922 transitions. [2022-01-18 16:28:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:28:27,593 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:28:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:27,612 INFO L225 Difference]: With dead ends: 14773 [2022-01-18 16:28:27,612 INFO L226 Difference]: Without dead ends: 14606 [2022-01-18 16:28:27,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=652, Invalid=3508, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 16:28:27,613 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 365 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:27,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 1267 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1080 Invalid, 0 Unknown, 250 Unchecked, 0.5s Time] [2022-01-18 16:28:27,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14606 states. [2022-01-18 16:28:27,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14606 to 10494. [2022-01-18 16:28:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 2.2559801772610313) internal successors, (23672), 10493 states have internal predecessors, (23672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 23672 transitions. [2022-01-18 16:28:27,761 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 23672 transitions. Word has length 39 [2022-01-18 16:28:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:27,761 INFO L470 AbstractCegarLoop]: Abstraction has 10494 states and 23672 transitions. [2022-01-18 16:28:27,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 23672 transitions. [2022-01-18 16:28:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:28:27,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:27,766 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:27,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:27,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:27,966 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:27,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1423715278, now seen corresponding path program 100 times [2022-01-18 16:28:27,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:27,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953500574] [2022-01-18 16:28:27,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:27,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:28,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:28,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953500574] [2022-01-18 16:28:28,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953500574] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:28,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495480814] [2022-01-18 16:28:28,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:28:28,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:28,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:28,341 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:28,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 16:28:28,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:28:28,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:28,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:28:28,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:29,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:29,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:29,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:28:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:29,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:30,234 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:28:30,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:28:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:31,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495480814] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:31,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:31,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 38 [2022-01-18 16:28:31,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32812866] [2022-01-18 16:28:31,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:31,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:28:31,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:31,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:28:31,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:28:31,532 INFO L87 Difference]: Start difference. First operand 10494 states and 23672 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:33,529 INFO L93 Difference]: Finished difference Result 15142 states and 33727 transitions. [2022-01-18 16:28:33,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 16:28:33,530 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:28:33,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:33,546 INFO L225 Difference]: With dead ends: 15142 [2022-01-18 16:28:33,546 INFO L226 Difference]: Without dead ends: 14997 [2022-01-18 16:28:33,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1041, Invalid=5601, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 16:28:33,547 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 361 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:33,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 1574 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1124 Invalid, 0 Unknown, 393 Unchecked, 0.6s Time] [2022-01-18 16:28:33,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14997 states. [2022-01-18 16:28:33,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14997 to 10777. [2022-01-18 16:28:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10777 states, 10776 states have (on average 2.2592798812175205) internal successors, (24346), 10776 states have internal predecessors, (24346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10777 states to 10777 states and 24346 transitions. [2022-01-18 16:28:33,683 INFO L78 Accepts]: Start accepts. Automaton has 10777 states and 24346 transitions. Word has length 39 [2022-01-18 16:28:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:33,683 INFO L470 AbstractCegarLoop]: Abstraction has 10777 states and 24346 transitions. [2022-01-18 16:28:33,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 10777 states and 24346 transitions. [2022-01-18 16:28:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:28:33,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:33,688 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:33,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 16:28:33,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-01-18 16:28:33,889 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:33,889 INFO L85 PathProgramCache]: Analyzing trace with hash -390224334, now seen corresponding path program 101 times [2022-01-18 16:28:33,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:33,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622132541] [2022-01-18 16:28:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:33,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:34,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:34,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622132541] [2022-01-18 16:28:34,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622132541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:34,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549767704] [2022-01-18 16:28:34,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:28:34,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:34,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:34,221 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:34,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 16:28:34,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 16:28:34,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:34,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-18 16:28:34,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:34,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:34,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:34,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:34,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:35,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:35,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:35,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:35,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:35,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:35,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:35,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:35,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:35,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:35,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:35,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:35,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:35,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:35,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:35,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2022-01-18 16:28:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:35,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:36,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:36,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:28:36,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 372 [2022-01-18 16:28:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:36,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549767704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:36,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:36,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-01-18 16:28:36,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576586181] [2022-01-18 16:28:36,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:36,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-18 16:28:36,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:36,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-18 16:28:36,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1806, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:28:36,862 INFO L87 Difference]: Start difference. First operand 10777 states and 24346 transitions. Second operand has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:46,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:46,875 INFO L93 Difference]: Finished difference Result 16482 states and 36607 transitions. [2022-01-18 16:28:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-18 16:28:46,876 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:28:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:46,897 INFO L225 Difference]: With dead ends: 16482 [2022-01-18 16:28:46,898 INFO L226 Difference]: Without dead ends: 15997 [2022-01-18 16:28:46,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7667 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=3760, Invalid=21680, Unknown=0, NotChecked=0, Total=25440 [2022-01-18 16:28:46,899 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 711 mSDsluCounter, 2607 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 2476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 696 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:46,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 2064 Invalid, 2476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1474 Invalid, 0 Unknown, 696 Unchecked, 1.2s Time] [2022-01-18 16:28:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15997 states. [2022-01-18 16:28:47,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15997 to 11355. [2022-01-18 16:28:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11355 states, 11354 states have (on average 2.2595561035758323) internal successors, (25655), 11354 states have internal predecessors, (25655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11355 states to 11355 states and 25655 transitions. [2022-01-18 16:28:47,076 INFO L78 Accepts]: Start accepts. Automaton has 11355 states and 25655 transitions. Word has length 39 [2022-01-18 16:28:47,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:47,076 INFO L470 AbstractCegarLoop]: Abstraction has 11355 states and 25655 transitions. [2022-01-18 16:28:47,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 11355 states and 25655 transitions. [2022-01-18 16:28:47,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:28:47,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:47,082 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:47,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-18 16:28:47,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:47,282 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:47,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:47,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1924206786, now seen corresponding path program 102 times [2022-01-18 16:28:47,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:47,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828595195] [2022-01-18 16:28:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:47,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:47,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:47,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828595195] [2022-01-18 16:28:47,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828595195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:47,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929272577] [2022-01-18 16:28:47,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:28:47,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:47,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:47,601 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:47,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 16:28:47,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:28:47,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:47,623 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-18 16:28:47,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:48,199 INFO L353 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-01-18 16:28:48,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:28:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:48,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:49,414 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:28:49,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:28:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:50,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929272577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:50,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:50,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-01-18 16:28:50,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819095076] [2022-01-18 16:28:50,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:50,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:28:50,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:50,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:28:50,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:28:50,154 INFO L87 Difference]: Start difference. First operand 11355 states and 25655 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:52,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:52,259 INFO L93 Difference]: Finished difference Result 16614 states and 37194 transitions. [2022-01-18 16:28:52,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 16:28:52,259 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:28:52,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:52,281 INFO L225 Difference]: With dead ends: 16614 [2022-01-18 16:28:52,282 INFO L226 Difference]: Without dead ends: 16544 [2022-01-18 16:28:52,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1024, Invalid=5456, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:28:52,282 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 264 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:52,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 1776 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1585 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:28:52,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16544 states. [2022-01-18 16:28:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16544 to 11299. [2022-01-18 16:28:52,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11299 states, 11298 states have (on average 2.2590724021950788) internal successors, (25523), 11298 states have internal predecessors, (25523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11299 states to 11299 states and 25523 transitions. [2022-01-18 16:28:52,448 INFO L78 Accepts]: Start accepts. Automaton has 11299 states and 25523 transitions. Word has length 39 [2022-01-18 16:28:52,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:52,448 INFO L470 AbstractCegarLoop]: Abstraction has 11299 states and 25523 transitions. [2022-01-18 16:28:52,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:52,448 INFO L276 IsEmpty]: Start isEmpty. Operand 11299 states and 25523 transitions. [2022-01-18 16:28:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-18 16:28:52,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:52,455 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:52,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:52,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:52,655 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:52,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:52,655 INFO L85 PathProgramCache]: Analyzing trace with hash -648973305, now seen corresponding path program 103 times [2022-01-18 16:28:52,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:52,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872292210] [2022-01-18 16:28:52,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:52,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 49 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:52,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:52,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872292210] [2022-01-18 16:28:52,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872292210] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:52,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985967208] [2022-01-18 16:28:52,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:28:52,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:52,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:52,706 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:52,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 16:28:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:52,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 16:28:52,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 49 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:52,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 49 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:52,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985967208] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:52,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:52,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-18 16:28:52,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853211849] [2022-01-18 16:28:52,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:52,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 16:28:52,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:52,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 16:28:52,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:28:52,835 INFO L87 Difference]: Start difference. First operand 11299 states and 25523 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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) [2022-01-18 16:28:52,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:52,906 INFO L93 Difference]: Finished difference Result 14676 states and 33572 transitions. [2022-01-18 16:28:52,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 16:28:52,906 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 40 [2022-01-18 16:28:52,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:52,925 INFO L225 Difference]: With dead ends: 14676 [2022-01-18 16:28:52,926 INFO L226 Difference]: Without dead ends: 14668 [2022-01-18 16:28:52,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:28:52,926 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 107 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:52,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 100 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:28:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14668 states. [2022-01-18 16:28:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14668 to 13931. [2022-01-18 16:28:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13931 states, 13930 states have (on average 2.294974874371859) internal successors, (31969), 13930 states have internal predecessors, (31969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13931 states to 13931 states and 31969 transitions. [2022-01-18 16:28:53,145 INFO L78 Accepts]: Start accepts. Automaton has 13931 states and 31969 transitions. Word has length 40 [2022-01-18 16:28:53,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:53,145 INFO L470 AbstractCegarLoop]: Abstraction has 13931 states and 31969 transitions. [2022-01-18 16:28:53,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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) [2022-01-18 16:28:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 13931 states and 31969 transitions. [2022-01-18 16:28:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:28:53,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:53,152 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:53,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-01-18 16:28:53,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2022-01-18 16:28:53,353 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:53,353 INFO L85 PathProgramCache]: Analyzing trace with hash -719883969, now seen corresponding path program 104 times [2022-01-18 16:28:53,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:53,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102550762] [2022-01-18 16:28:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:53,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:53,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:53,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102550762] [2022-01-18 16:28:53,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102550762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:53,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469927986] [2022-01-18 16:28:53,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:28:53,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:53,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:53,633 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:53,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 16:28:53,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:28:53,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:53,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:28:53,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:54,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:54,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:54,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:28:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:54,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:55,596 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:28:55,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:28:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 11 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:56,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469927986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:56,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:56,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-01-18 16:28:56,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519769290] [2022-01-18 16:28:56,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:56,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:28:56,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:56,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:28:56,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:28:56,832 INFO L87 Difference]: Start difference. First operand 13931 states and 31969 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:58,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:58,645 INFO L93 Difference]: Finished difference Result 23001 states and 52556 transitions. [2022-01-18 16:28:58,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:28:58,646 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:28:58,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:58,677 INFO L225 Difference]: With dead ends: 23001 [2022-01-18 16:28:58,677 INFO L226 Difference]: Without dead ends: 22724 [2022-01-18 16:28:58,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=808, Invalid=4594, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:28:58,678 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 326 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 387 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:58,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1537 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1236 Invalid, 0 Unknown, 387 Unchecked, 0.6s Time] [2022-01-18 16:28:58,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22724 states. [2022-01-18 16:28:58,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22724 to 14127. [2022-01-18 16:28:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14127 states, 14126 states have (on average 2.288404360753221) internal successors, (32326), 14126 states have internal predecessors, (32326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14127 states to 14127 states and 32326 transitions. [2022-01-18 16:28:58,914 INFO L78 Accepts]: Start accepts. Automaton has 14127 states and 32326 transitions. Word has length 42 [2022-01-18 16:28:58,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:58,914 INFO L470 AbstractCegarLoop]: Abstraction has 14127 states and 32326 transitions. [2022-01-18 16:28:58,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:58,914 INFO L276 IsEmpty]: Start isEmpty. Operand 14127 states and 32326 transitions. [2022-01-18 16:28:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:28:58,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:58,922 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:58,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 16:28:59,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:59,122 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:59,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:59,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1921076959, now seen corresponding path program 105 times [2022-01-18 16:28:59,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:59,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873739362] [2022-01-18 16:28:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:59,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:59,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:59,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873739362] [2022-01-18 16:28:59,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873739362] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:59,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262822381] [2022-01-18 16:28:59,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:28:59,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:59,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:59,436 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:59,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 16:28:59,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 16:28:59,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:59,458 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:28:59,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:00,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:00,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:00,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:29:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:00,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:01,405 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:29:01,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:29:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:02,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262822381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:02,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:02,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-01-18 16:29:02,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038463782] [2022-01-18 16:29:02,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:02,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:29:02,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:02,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:29:02,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:29:02,821 INFO L87 Difference]: Start difference. First operand 14127 states and 32326 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:03,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:03,351 INFO L93 Difference]: Finished difference Result 14637 states and 33389 transitions. [2022-01-18 16:29:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:29:03,351 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:29:03,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:03,371 INFO L225 Difference]: With dead ends: 14637 [2022-01-18 16:29:03,371 INFO L226 Difference]: Without dead ends: 14630 [2022-01-18 16:29:03,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=389, Invalid=2161, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:29:03,372 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 151 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:03,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1327 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 294 Invalid, 0 Unknown, 217 Unchecked, 0.1s Time] [2022-01-18 16:29:03,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14630 states. [2022-01-18 16:29:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14630 to 14248. [2022-01-18 16:29:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14248 states, 14247 states have (on average 2.2910788236119886) internal successors, (32641), 14247 states have internal predecessors, (32641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14248 states to 14248 states and 32641 transitions. [2022-01-18 16:29:03,548 INFO L78 Accepts]: Start accepts. Automaton has 14248 states and 32641 transitions. Word has length 42 [2022-01-18 16:29:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:03,549 INFO L470 AbstractCegarLoop]: Abstraction has 14248 states and 32641 transitions. [2022-01-18 16:29:03,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 14248 states and 32641 transitions. [2022-01-18 16:29:03,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 16:29:03,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:03,557 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:03,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:03,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:03,757 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:03,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:03,757 INFO L85 PathProgramCache]: Analyzing trace with hash -913918449, now seen corresponding path program 106 times [2022-01-18 16:29:03,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:03,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128878400] [2022-01-18 16:29:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:03,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:04,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:04,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128878400] [2022-01-18 16:29:04,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128878400] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:04,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884441365] [2022-01-18 16:29:04,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:29:04,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:04,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:04,127 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:04,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 16:29:04,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:29:04,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:04,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-18 16:29:04,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:04,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:04,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:04,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-01-18 16:29:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:04,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:06,129 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-01-18 16:29:06,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-01-18 16:29:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:07,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884441365] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:07,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:07,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-01-18 16:29:07,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380972913] [2022-01-18 16:29:07,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:07,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:29:07,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:07,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:29:07,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:29:07,228 INFO L87 Difference]: Start difference. First operand 14248 states and 32641 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:09,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:09,820 INFO L93 Difference]: Finished difference Result 20753 states and 46931 transitions. [2022-01-18 16:29:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 16:29:09,821 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 16:29:09,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:09,849 INFO L225 Difference]: With dead ends: 20753 [2022-01-18 16:29:09,850 INFO L226 Difference]: Without dead ends: 20651 [2022-01-18 16:29:09,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2811 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1536, Invalid=8564, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 16:29:09,851 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 327 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 2053 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 815 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:09,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 2053 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1223 Invalid, 0 Unknown, 815 Unchecked, 0.6s Time] [2022-01-18 16:29:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20651 states. [2022-01-18 16:29:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20651 to 14230. [2022-01-18 16:29:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14230 states, 14229 states have (on average 2.2911659287370862) internal successors, (32601), 14229 states have internal predecessors, (32601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14230 states to 14230 states and 32601 transitions. [2022-01-18 16:29:10,098 INFO L78 Accepts]: Start accepts. Automaton has 14230 states and 32601 transitions. Word has length 42 [2022-01-18 16:29:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:10,098 INFO L470 AbstractCegarLoop]: Abstraction has 14230 states and 32601 transitions. [2022-01-18 16:29:10,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:10,098 INFO L276 IsEmpty]: Start isEmpty. Operand 14230 states and 32601 transitions. [2022-01-18 16:29:10,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:29:10,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:10,106 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:10,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:10,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:10,319 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:10,320 INFO L85 PathProgramCache]: Analyzing trace with hash -621581526, now seen corresponding path program 107 times [2022-01-18 16:29:10,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:10,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331061278] [2022-01-18 16:29:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:10,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:10,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:10,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331061278] [2022-01-18 16:29:10,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331061278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:10,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552369576] [2022-01-18 16:29:10,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:29:10,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:10,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:10,657 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:10,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 16:29:10,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 16:29:10,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:10,682 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 66 conjunts are in the unsatisfiable core [2022-01-18 16:29:10,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:11,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:11,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:11,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:11,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:11,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:11,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:11,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:11,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:11,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:11,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 36 [2022-01-18 16:29:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:11,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:13,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:13,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:29:13,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 84 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 148 treesize of output 472 [2022-01-18 16:29:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:14,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552369576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:14,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:14,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 52 [2022-01-18 16:29:14,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307052157] [2022-01-18 16:29:14,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:14,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-18 16:29:14,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:14,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-18 16:29:14,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=2240, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:29:14,406 INFO L87 Difference]: Start difference. First operand 14230 states and 32601 transitions. Second operand has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 52 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:24,757 INFO L93 Difference]: Finished difference Result 29284 states and 66268 transitions. [2022-01-18 16:29:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-18 16:29:24,758 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 52 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:29:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:24,803 INFO L225 Difference]: With dead ends: 29284 [2022-01-18 16:29:24,803 INFO L226 Difference]: Without dead ends: 28769 [2022-01-18 16:29:24,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 51 SyntacticMatches, 10 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7596 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=3281, Invalid=21841, Unknown=0, NotChecked=0, Total=25122 [2022-01-18 16:29:24,805 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 718 mSDsluCounter, 3796 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 3235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 781 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:24,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 2962 Invalid, 3235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2262 Invalid, 0 Unknown, 781 Unchecked, 1.4s Time] [2022-01-18 16:29:24,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28769 states. [2022-01-18 16:29:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28769 to 15815. [2022-01-18 16:29:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15815 states, 15814 states have (on average 2.2893006197040595) internal successors, (36203), 15814 states have internal predecessors, (36203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15815 states to 15815 states and 36203 transitions. [2022-01-18 16:29:25,116 INFO L78 Accepts]: Start accepts. Automaton has 15815 states and 36203 transitions. Word has length 43 [2022-01-18 16:29:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:25,116 INFO L470 AbstractCegarLoop]: Abstraction has 15815 states and 36203 transitions. [2022-01-18 16:29:25,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 52 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 15815 states and 36203 transitions. [2022-01-18 16:29:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:29:25,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:25,124 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:25,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-01-18 16:29:25,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 16:29:25,325 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:25,325 INFO L85 PathProgramCache]: Analyzing trace with hash 838390362, now seen corresponding path program 108 times [2022-01-18 16:29:25,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:25,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32960264] [2022-01-18 16:29:25,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:25,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:25,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:25,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32960264] [2022-01-18 16:29:25,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32960264] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:25,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896035793] [2022-01-18 16:29:25,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:29:25,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:25,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:25,653 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:25,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 16:29:25,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 16:29:25,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:25,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-18 16:29:25,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:26,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:26,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:26,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:26,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:26,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:26,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:26,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:26,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:26,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-01-18 16:29:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:26,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:28,510 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-01-18 16:29:28,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-01-18 16:29:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:30,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896035793] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:30,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:30,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-01-18 16:29:30,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482837566] [2022-01-18 16:29:30,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:30,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-18 16:29:30,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-18 16:29:30,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=2090, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 16:29:30,455 INFO L87 Difference]: Start difference. First operand 15815 states and 36203 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:35,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:35,235 INFO L93 Difference]: Finished difference Result 31127 states and 70286 transitions. [2022-01-18 16:29:35,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-18 16:29:35,235 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:29:35,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:35,287 INFO L225 Difference]: With dead ends: 31127 [2022-01-18 16:29:35,287 INFO L226 Difference]: Without dead ends: 31059 [2022-01-18 16:29:35,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7121 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2862, Invalid=18018, Unknown=0, NotChecked=0, Total=20880 [2022-01-18 16:29:35,289 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 386 mSDsluCounter, 2924 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 2789 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:35,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 2789 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1948 Invalid, 0 Unknown, 317 Unchecked, 1.1s Time] [2022-01-18 16:29:35,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31059 states. [2022-01-18 16:29:35,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31059 to 15572. [2022-01-18 16:29:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15572 states, 15571 states have (on average 2.2897694431956843) internal successors, (35654), 15571 states have internal predecessors, (35654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:35,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15572 states to 15572 states and 35654 transitions. [2022-01-18 16:29:35,624 INFO L78 Accepts]: Start accepts. Automaton has 15572 states and 35654 transitions. Word has length 43 [2022-01-18 16:29:35,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:35,624 INFO L470 AbstractCegarLoop]: Abstraction has 15572 states and 35654 transitions. [2022-01-18 16:29:35,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:35,624 INFO L276 IsEmpty]: Start isEmpty. Operand 15572 states and 35654 transitions. [2022-01-18 16:29:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:29:35,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:35,632 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:35,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:35,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 16:29:35,833 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:35,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1774399994, now seen corresponding path program 109 times [2022-01-18 16:29:35,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:35,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987055162] [2022-01-18 16:29:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:35,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:36,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:36,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987055162] [2022-01-18 16:29:36,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987055162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:36,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018198904] [2022-01-18 16:29:36,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:29:36,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:36,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:36,214 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:36,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 16:29:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:36,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-18 16:29:36,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:37,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:37,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:37,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:37,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:37,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:37,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:37,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:37,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:37,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-01-18 16:29:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:37,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:39,046 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-01-18 16:29:39,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-01-18 16:29:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 6 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:42,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018198904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:42,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:42,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-01-18 16:29:42,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729768000] [2022-01-18 16:29:42,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:42,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:29:42,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:42,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:29:42,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2181, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:29:42,381 INFO L87 Difference]: Start difference. First operand 15572 states and 35654 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:44,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:44,746 INFO L93 Difference]: Finished difference Result 29929 states and 68119 transitions. [2022-01-18 16:29:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 16:29:44,746 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:29:44,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:44,798 INFO L225 Difference]: With dead ends: 29929 [2022-01-18 16:29:44,799 INFO L226 Difference]: Without dead ends: 29517 [2022-01-18 16:29:44,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2509 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1350, Invalid=7206, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:29:44,799 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 633 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:44,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1585 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1206 Invalid, 0 Unknown, 355 Unchecked, 0.7s Time] [2022-01-18 16:29:44,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29517 states. [2022-01-18 16:29:45,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29517 to 13451. [2022-01-18 16:29:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13451 states, 13450 states have (on average 2.275910780669145) internal successors, (30611), 13450 states have internal predecessors, (30611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13451 states to 13451 states and 30611 transitions. [2022-01-18 16:29:45,090 INFO L78 Accepts]: Start accepts. Automaton has 13451 states and 30611 transitions. Word has length 43 [2022-01-18 16:29:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:45,090 INFO L470 AbstractCegarLoop]: Abstraction has 13451 states and 30611 transitions. [2022-01-18 16:29:45,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 13451 states and 30611 transitions. [2022-01-18 16:29:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:29:45,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:45,098 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:45,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:45,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 16:29:45,298 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:45,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1060595414, now seen corresponding path program 110 times [2022-01-18 16:29:45,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:45,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476915818] [2022-01-18 16:29:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:45,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:45,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:45,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476915818] [2022-01-18 16:29:45,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476915818] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:45,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098132742] [2022-01-18 16:29:45,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:29:45,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:45,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:45,647 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:45,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 16:29:45,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:29:45,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:45,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-18 16:29:45,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:46,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:46,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:46,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:46,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:46,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:46,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:46,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:46,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:46,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-01-18 16:29:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:46,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:48,445 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-01-18 16:29:48,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-01-18 16:29:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:50,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098132742] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:50,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:50,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-01-18 16:29:50,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529850832] [2022-01-18 16:29:50,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:50,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:29:50,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:50,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:29:50,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=2182, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:29:50,450 INFO L87 Difference]: Start difference. First operand 13451 states and 30611 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:53,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:53,783 INFO L93 Difference]: Finished difference Result 25886 states and 58270 transitions. [2022-01-18 16:29:53,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 16:29:53,783 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:29:53,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:53,825 INFO L225 Difference]: With dead ends: 25886 [2022-01-18 16:29:53,825 INFO L226 Difference]: Without dead ends: 25833 [2022-01-18 16:29:53,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4190 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1899, Invalid=11441, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 16:29:53,826 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 464 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 440 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:53,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 1915 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1210 Invalid, 0 Unknown, 440 Unchecked, 0.7s Time] [2022-01-18 16:29:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25833 states. [2022-01-18 16:29:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25833 to 12734. [2022-01-18 16:29:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12734 states, 12733 states have (on average 2.2737768004398022) internal successors, (28952), 12733 states have internal predecessors, (28952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12734 states to 12734 states and 28952 transitions. [2022-01-18 16:29:54,078 INFO L78 Accepts]: Start accepts. Automaton has 12734 states and 28952 transitions. Word has length 43 [2022-01-18 16:29:54,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:54,078 INFO L470 AbstractCegarLoop]: Abstraction has 12734 states and 28952 transitions. [2022-01-18 16:29:54,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:54,078 INFO L276 IsEmpty]: Start isEmpty. Operand 12734 states and 28952 transitions. [2022-01-18 16:29:54,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:29:54,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:54,085 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:54,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:54,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-01-18 16:29:54,285 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:54,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:54,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1973677926, now seen corresponding path program 111 times [2022-01-18 16:29:54,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:54,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734958337] [2022-01-18 16:29:54,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:54,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:54,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:54,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734958337] [2022-01-18 16:29:54,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734958337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:54,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141906657] [2022-01-18 16:29:54,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:29:54,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:54,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:54,642 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:54,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 16:29:54,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 16:29:54,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:54,665 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-18 16:29:54,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:55,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:55,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:55,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:55,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:55,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:55,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:55,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:55,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:55,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-01-18 16:29:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:55,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:57,461 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-01-18 16:29:57,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-01-18 16:29:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:59,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141906657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:59,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:59,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-01-18 16:29:59,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609073897] [2022-01-18 16:29:59,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:59,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:29:59,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:59,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:29:59,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=2178, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:29:59,512 INFO L87 Difference]: Start difference. First operand 12734 states and 28952 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:01,819 INFO L93 Difference]: Finished difference Result 18676 states and 41880 transitions. [2022-01-18 16:30:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:30:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:30:01,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:01,844 INFO L225 Difference]: With dead ends: 18676 [2022-01-18 16:30:01,845 INFO L226 Difference]: Without dead ends: 18639 [2022-01-18 16:30:01,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2731 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1309, Invalid=8003, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 16:30:01,845 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 370 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:01,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 1615 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 965 Invalid, 0 Unknown, 363 Unchecked, 0.6s Time] [2022-01-18 16:30:01,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18639 states. [2022-01-18 16:30:02,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18639 to 13208. [2022-01-18 16:30:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13208 states, 13207 states have (on average 2.2704626334519573) internal successors, (29986), 13207 states have internal predecessors, (29986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13208 states to 13208 states and 29986 transitions. [2022-01-18 16:30:02,051 INFO L78 Accepts]: Start accepts. Automaton has 13208 states and 29986 transitions. Word has length 43 [2022-01-18 16:30:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:02,052 INFO L470 AbstractCegarLoop]: Abstraction has 13208 states and 29986 transitions. [2022-01-18 16:30:02,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 13208 states and 29986 transitions. [2022-01-18 16:30:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:30:02,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:02,059 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:02,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-01-18 16:30:02,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:02,260 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash -268972998, now seen corresponding path program 112 times [2022-01-18 16:30:02,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:02,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372413743] [2022-01-18 16:30:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:02,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:30:02,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:02,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372413743] [2022-01-18 16:30:02,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372413743] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:02,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77597588] [2022-01-18 16:30:02,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:30:02,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:02,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:02,607 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:02,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 16:30:02,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:30:02,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:02,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-18 16:30:02,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:03,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:03,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:03,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:03,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:03,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:03,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:03,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:03,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:03,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-01-18 16:30:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 3 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:03,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:05,385 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-01-18 16:30:05,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-01-18 16:30:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:06,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77597588] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:06,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:06,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-01-18 16:30:06,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124725873] [2022-01-18 16:30:06,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:06,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-18 16:30:06,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:06,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-18 16:30:06,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 16:30:06,501 INFO L87 Difference]: Start difference. First operand 13208 states and 29986 transitions. Second operand has 50 states, 50 states have (on average 2.22) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:10,855 INFO L93 Difference]: Finished difference Result 21857 states and 48830 transitions. [2022-01-18 16:30:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-18 16:30:10,855 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:30:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:10,885 INFO L225 Difference]: With dead ends: 21857 [2022-01-18 16:30:10,885 INFO L226 Difference]: Without dead ends: 20821 [2022-01-18 16:30:10,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5466 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2203, Invalid=14309, Unknown=0, NotChecked=0, Total=16512 [2022-01-18 16:30:10,887 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 639 mSDsluCounter, 3513 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 2259 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 668 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:10,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 2259 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2130 Invalid, 0 Unknown, 668 Unchecked, 1.2s Time] [2022-01-18 16:30:10,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20821 states. [2022-01-18 16:30:11,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20821 to 13850. [2022-01-18 16:30:11,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13850 states, 13849 states have (on average 2.274243627698751) internal successors, (31496), 13849 states have internal predecessors, (31496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13850 states to 13850 states and 31496 transitions. [2022-01-18 16:30:11,154 INFO L78 Accepts]: Start accepts. Automaton has 13850 states and 31496 transitions. Word has length 43 [2022-01-18 16:30:11,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:11,154 INFO L470 AbstractCegarLoop]: Abstraction has 13850 states and 31496 transitions. [2022-01-18 16:30:11,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:11,154 INFO L276 IsEmpty]: Start isEmpty. Operand 13850 states and 31496 transitions. [2022-01-18 16:30:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:30:11,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:11,161 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:11,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:11,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:11,367 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:11,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:11,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1190998890, now seen corresponding path program 113 times [2022-01-18 16:30:11,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:11,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654975704] [2022-01-18 16:30:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:11,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:11,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:11,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654975704] [2022-01-18 16:30:11,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654975704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:11,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127448710] [2022-01-18 16:30:11,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:30:11,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:11,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:11,771 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:11,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 16:30:11,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-18 16:30:11,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:11,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-18 16:30:11,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:12,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:12,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:12,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:12,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:12,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:12,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:12,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:12,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:12,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-01-18 16:30:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:12,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:14,581 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-01-18 16:30:14,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-01-18 16:30:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:16,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127448710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:16,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:16,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-01-18 16:30:16,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922861364] [2022-01-18 16:30:16,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:16,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:30:16,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:16,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:30:16,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2176, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:30:16,450 INFO L87 Difference]: Start difference. First operand 13850 states and 31496 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:17,076 INFO L93 Difference]: Finished difference Result 14553 states and 32950 transitions. [2022-01-18 16:30:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:30:17,076 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:30:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:17,095 INFO L225 Difference]: With dead ends: 14553 [2022-01-18 16:30:17,095 INFO L226 Difference]: Without dead ends: 14540 [2022-01-18 16:30:17,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=537, Invalid=3245, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:30:17,096 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 184 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:17,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1639 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 296 Invalid, 0 Unknown, 246 Unchecked, 0.1s Time] [2022-01-18 16:30:17,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14540 states. [2022-01-18 16:30:17,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14540 to 14057. [2022-01-18 16:30:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14057 states, 14056 states have (on average 2.2771770062606715) internal successors, (32008), 14056 states have internal predecessors, (32008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14057 states to 14057 states and 32008 transitions. [2022-01-18 16:30:17,273 INFO L78 Accepts]: Start accepts. Automaton has 14057 states and 32008 transitions. Word has length 43 [2022-01-18 16:30:17,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:17,274 INFO L470 AbstractCegarLoop]: Abstraction has 14057 states and 32008 transitions. [2022-01-18 16:30:17,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 14057 states and 32008 transitions. [2022-01-18 16:30:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:30:17,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:17,318 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:17,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-01-18 16:30:17,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-01-18 16:30:17,518 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:17,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1138183082, now seen corresponding path program 114 times [2022-01-18 16:30:17,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:17,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253631025] [2022-01-18 16:30:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:17,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:30:17,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:17,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253631025] [2022-01-18 16:30:17,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253631025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:17,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658628113] [2022-01-18 16:30:17,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:30:17,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:17,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:17,833 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:17,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 16:30:17,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:30:17,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:17,856 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-18 16:30:17,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:18,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:18,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:18,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:18,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:18,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:18,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:18,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:18,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:18,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-01-18 16:30:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:18,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:20,541 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-01-18 16:30:20,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-01-18 16:30:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:23,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658628113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:23,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:23,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 46 [2022-01-18 16:30:23,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765843288] [2022-01-18 16:30:23,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:23,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 16:30:23,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:23,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 16:30:23,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1795, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 16:30:23,488 INFO L87 Difference]: Start difference. First operand 14057 states and 32008 transitions. Second operand has 47 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:25,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:25,578 INFO L93 Difference]: Finished difference Result 16995 states and 38199 transitions. [2022-01-18 16:30:25,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:30:25,578 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:30:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:25,599 INFO L225 Difference]: With dead ends: 16995 [2022-01-18 16:30:25,599 INFO L226 Difference]: Without dead ends: 16595 [2022-01-18 16:30:25,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 16:30:25,600 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 497 mSDsluCounter, 2654 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:25,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 1877 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1869 Invalid, 0 Unknown, 194 Unchecked, 1.0s Time] [2022-01-18 16:30:25,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16595 states. [2022-01-18 16:30:25,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16595 to 14528. [2022-01-18 16:30:25,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14528 states, 14527 states have (on average 2.278928891030495) internal successors, (33106), 14527 states have internal predecessors, (33106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14528 states to 14528 states and 33106 transitions. [2022-01-18 16:30:25,792 INFO L78 Accepts]: Start accepts. Automaton has 14528 states and 33106 transitions. Word has length 43 [2022-01-18 16:30:25,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:25,792 INFO L470 AbstractCegarLoop]: Abstraction has 14528 states and 33106 transitions. [2022-01-18 16:30:25,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:25,792 INFO L276 IsEmpty]: Start isEmpty. Operand 14528 states and 33106 transitions. [2022-01-18 16:30:25,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:30:25,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:25,800 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:25,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-18 16:30:26,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:26,001 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:26,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:26,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1232090406, now seen corresponding path program 115 times [2022-01-18 16:30:26,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:26,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077162663] [2022-01-18 16:30:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:26,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:26,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:26,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077162663] [2022-01-18 16:30:26,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077162663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:26,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011048254] [2022-01-18 16:30:26,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:30:26,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:26,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:26,326 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:26,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 16:30:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:26,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-18 16:30:26,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:27,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:27,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:27,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:27,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:27,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:27,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:27,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:27,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:27,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-01-18 16:30:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:27,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:29,102 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-01-18 16:30:29,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-01-18 16:30:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:31,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011048254] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:31,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:31,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 47 [2022-01-18 16:30:31,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553487220] [2022-01-18 16:30:31,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:31,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-18 16:30:31,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:31,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-18 16:30:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1887, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:30:31,242 INFO L87 Difference]: Start difference. First operand 14528 states and 33106 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:33,205 INFO L93 Difference]: Finished difference Result 18318 states and 41228 transitions. [2022-01-18 16:30:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 16:30:33,205 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:30:33,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:33,230 INFO L225 Difference]: With dead ends: 18318 [2022-01-18 16:30:33,230 INFO L226 Difference]: Without dead ends: 18225 [2022-01-18 16:30:33,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=843, Invalid=4857, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 16:30:33,231 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 376 mSDsluCounter, 1761 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:33,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 1540 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1344 Invalid, 0 Unknown, 121 Unchecked, 0.8s Time] [2022-01-18 16:30:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18225 states. [2022-01-18 16:30:33,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18225 to 14432. [2022-01-18 16:30:33,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14432 states, 14431 states have (on average 2.2783590880742843) internal successors, (32879), 14431 states have internal predecessors, (32879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14432 states to 14432 states and 32879 transitions. [2022-01-18 16:30:33,449 INFO L78 Accepts]: Start accepts. Automaton has 14432 states and 32879 transitions. Word has length 43 [2022-01-18 16:30:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:33,449 INFO L470 AbstractCegarLoop]: Abstraction has 14432 states and 32879 transitions. [2022-01-18 16:30:33,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 14432 states and 32879 transitions. [2022-01-18 16:30:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:30:33,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:33,458 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:33,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-18 16:30:33,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:33,660 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1098687706, now seen corresponding path program 116 times [2022-01-18 16:30:33,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:33,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324636625] [2022-01-18 16:30:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:33,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:34,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:34,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324636625] [2022-01-18 16:30:34,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324636625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:34,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492306219] [2022-01-18 16:30:34,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:30:34,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:34,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:34,023 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:34,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 16:30:34,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:30:34,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:34,045 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-18 16:30:34,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:35,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:35,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:35,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:35,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:35,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:35,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:35,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:35,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:35,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-01-18 16:30:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:35,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:36,816 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-01-18 16:30:36,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-01-18 16:30:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:39,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492306219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:39,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:39,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-01-18 16:30:39,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117226503] [2022-01-18 16:30:39,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:39,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-18 16:30:39,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:39,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-18 16:30:39,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2068, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 16:30:39,265 INFO L87 Difference]: Start difference. First operand 14432 states and 32879 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:42,381 INFO L93 Difference]: Finished difference Result 21972 states and 49366 transitions. [2022-01-18 16:30:42,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 16:30:42,382 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:30:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:42,412 INFO L225 Difference]: With dead ends: 21972 [2022-01-18 16:30:42,412 INFO L226 Difference]: Without dead ends: 21836 [2022-01-18 16:30:42,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2976 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1570, Invalid=8530, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 16:30:42,414 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 348 mSDsluCounter, 2701 mSDsCounter, 0 mSdLazyCounter, 1823 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:42,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 2513 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1823 Invalid, 0 Unknown, 315 Unchecked, 1.0s Time] [2022-01-18 16:30:42,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21836 states. [2022-01-18 16:30:42,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21836 to 14330. [2022-01-18 16:30:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14330 states, 14329 states have (on average 2.2783167003977947) internal successors, (32646), 14329 states have internal predecessors, (32646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14330 states to 14330 states and 32646 transitions. [2022-01-18 16:30:42,711 INFO L78 Accepts]: Start accepts. Automaton has 14330 states and 32646 transitions. Word has length 43 [2022-01-18 16:30:42,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:42,711 INFO L470 AbstractCegarLoop]: Abstraction has 14330 states and 32646 transitions. [2022-01-18 16:30:42,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:42,711 INFO L276 IsEmpty]: Start isEmpty. Operand 14330 states and 32646 transitions. [2022-01-18 16:30:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:30:42,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:42,719 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:42,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-01-18 16:30:42,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-01-18 16:30:42,919 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:42,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash -996475174, now seen corresponding path program 117 times [2022-01-18 16:30:42,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:42,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932093222] [2022-01-18 16:30:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:42,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:43,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:43,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932093222] [2022-01-18 16:30:43,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932093222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:43,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106958858] [2022-01-18 16:30:43,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:30:43,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:43,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:43,306 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:43,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 16:30:43,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 16:30:43,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:43,329 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-18 16:30:43,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:44,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:44,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:44,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:44,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:44,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:44,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:44,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:44,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:44,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-01-18 16:30:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:44,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:46,078 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-01-18 16:30:46,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-01-18 16:30:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:47,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106958858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:47,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:47,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-01-18 16:30:47,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418230093] [2022-01-18 16:30:47,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:47,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:30:47,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:47,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:30:47,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:30:47,738 INFO L87 Difference]: Start difference. First operand 14330 states and 32646 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:50,869 INFO L93 Difference]: Finished difference Result 20828 states and 46823 transitions. [2022-01-18 16:30:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 16:30:50,869 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:30:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:50,897 INFO L225 Difference]: With dead ends: 20828 [2022-01-18 16:30:50,897 INFO L226 Difference]: Without dead ends: 20733 [2022-01-18 16:30:50,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3865 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1679, Invalid=10977, Unknown=0, NotChecked=0, Total=12656 [2022-01-18 16:30:50,898 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 370 mSDsluCounter, 2306 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 2220 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:50,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 2220 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1448 Invalid, 0 Unknown, 639 Unchecked, 0.8s Time] [2022-01-18 16:30:50,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20733 states. [2022-01-18 16:30:51,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20733 to 14388. [2022-01-18 16:30:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14388 states, 14387 states have (on average 2.2774032112323623) internal successors, (32765), 14387 states have internal predecessors, (32765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14388 states to 14388 states and 32765 transitions. [2022-01-18 16:30:51,120 INFO L78 Accepts]: Start accepts. Automaton has 14388 states and 32765 transitions. Word has length 43 [2022-01-18 16:30:51,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:51,120 INFO L470 AbstractCegarLoop]: Abstraction has 14388 states and 32765 transitions. [2022-01-18 16:30:51,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:51,120 INFO L276 IsEmpty]: Start isEmpty. Operand 14388 states and 32765 transitions. [2022-01-18 16:30:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:30:51,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:51,128 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:51,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-01-18 16:30:51,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 16:30:51,329 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:51,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:51,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1312980394, now seen corresponding path program 118 times [2022-01-18 16:30:51,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:51,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870528627] [2022-01-18 16:30:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:51,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:51,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:51,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870528627] [2022-01-18 16:30:51,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870528627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:51,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638990349] [2022-01-18 16:30:51,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:30:51,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:51,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:51,705 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:51,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 16:30:51,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:30:51,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:51,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-18 16:30:51,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:52,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:52,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:52,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:52,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:52,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:52,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:52,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:52,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:52,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-01-18 16:30:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:52,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:54,496 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-01-18 16:30:54,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-01-18 16:30:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 27 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:57,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638990349] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:57,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:57,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-01-18 16:30:57,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241292845] [2022-01-18 16:30:57,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:57,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:30:57,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:57,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:30:57,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2168, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:30:57,368 INFO L87 Difference]: Start difference. First operand 14388 states and 32765 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:31:01,357 INFO L93 Difference]: Finished difference Result 20298 states and 45651 transitions. [2022-01-18 16:31:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-18 16:31:01,357 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:31:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:31:01,386 INFO L225 Difference]: With dead ends: 20298 [2022-01-18 16:31:01,386 INFO L226 Difference]: Without dead ends: 20240 [2022-01-18 16:31:01,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4594 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2077, Invalid=13423, Unknown=0, NotChecked=0, Total=15500 [2022-01-18 16:31:01,388 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 309 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 2562 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 816 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:31:01,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 2562 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1961 Invalid, 0 Unknown, 816 Unchecked, 1.2s Time] [2022-01-18 16:31:01,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20240 states. [2022-01-18 16:31:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20240 to 14340. [2022-01-18 16:31:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14340 states, 14339 states have (on average 2.2772857242485527) internal successors, (32654), 14339 states have internal predecessors, (32654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14340 states to 14340 states and 32654 transitions. [2022-01-18 16:31:01,622 INFO L78 Accepts]: Start accepts. Automaton has 14340 states and 32654 transitions. Word has length 43 [2022-01-18 16:31:01,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:31:01,622 INFO L470 AbstractCegarLoop]: Abstraction has 14340 states and 32654 transitions. [2022-01-18 16:31:01,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:01,622 INFO L276 IsEmpty]: Start isEmpty. Operand 14340 states and 32654 transitions. [2022-01-18 16:31:01,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:31:01,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:31:01,629 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:31:01,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-01-18 16:31:01,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-18 16:31:01,830 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:31:01,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:31:01,831 INFO L85 PathProgramCache]: Analyzing trace with hash 341180362, now seen corresponding path program 119 times [2022-01-18 16:31:01,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:31:01,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522377149] [2022-01-18 16:31:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:31:01,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:31:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:31:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:02,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:31:02,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522377149] [2022-01-18 16:31:02,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522377149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:31:02,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842595754] [2022-01-18 16:31:02,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:31:02,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:02,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:31:02,192 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:31:02,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 16:31:02,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 16:31:02,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:31:02,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-18 16:31:02,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:21,077 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-01-18 16:32:21,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-01-18 16:32:21,078 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2022-01-18 16:32:21,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-18 16:32:21,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-01-18 16:32:21,279 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 46 more [2022-01-18 16:32:21,282 INFO L158 Benchmark]: Toolchain (without parser) took 626317.23ms. Allocated memory was 390.1MB in the beginning and 1.2GB in the end (delta: 803.2MB). Free memory was 352.8MB in the beginning and 570.6MB in the end (delta: -217.8MB). Peak memory consumption was 587.1MB. Max. memory is 16.0GB. [2022-01-18 16:32:21,282 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.15ms. Allocated memory is still 390.1MB. Free memory is still 353.9MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:32:21,282 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.74ms. Allocated memory is still 390.1MB. Free memory was 352.7MB in the beginning and 351.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:32:21,282 INFO L158 Benchmark]: Boogie Preprocessor took 11.59ms. Allocated memory is still 390.1MB. Free memory was 351.2MB in the beginning and 350.3MB in the end (delta: 939.4kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:32:21,282 INFO L158 Benchmark]: RCFGBuilder took 224.65ms. Allocated memory is still 390.1MB. Free memory was 350.2MB in the beginning and 341.0MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 16:32:21,282 INFO L158 Benchmark]: TraceAbstraction took 626057.45ms. Allocated memory was 390.1MB in the beginning and 1.2GB in the end (delta: 803.2MB). Free memory was 340.5MB in the beginning and 570.6MB in the end (delta: -230.1MB). Peak memory consumption was 574.5MB. Max. memory is 16.0GB. [2022-01-18 16:32:21,283 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 0.15ms. Allocated memory is still 390.1MB. Free memory is still 353.9MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 17.74ms. Allocated memory is still 390.1MB. Free memory was 352.7MB in the beginning and 351.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 11.59ms. Allocated memory is still 390.1MB. Free memory was 351.2MB in the beginning and 350.3MB in the end (delta: 939.4kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 224.65ms. Allocated memory is still 390.1MB. Free memory was 350.2MB in the beginning and 341.0MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 626057.45ms. Allocated memory was 390.1MB in the beginning and 1.2GB in the end (delta: 803.2MB). Free memory was 340.5MB in the beginning and 570.6MB in the end (delta: -230.1MB). Peak memory consumption was 574.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...