/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 17:46:39,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 17:46:39,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 17:46:39,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 17:46:39,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 17:46:39,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 17:46:39,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 17:46:39,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 17:46:40,010 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 17:46:40,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 17:46:40,011 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 17:46:40,011 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 17:46:40,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 17:46:40,012 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 17:46:40,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 17:46:40,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 17:46:40,013 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 17:46:40,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 17:46:40,014 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 17:46:40,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 17:46:40,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 17:46:40,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 17:46:40,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 17:46:40,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 17:46:40,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 17:46:40,016 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 17:46:40,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 17:46:40,016 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 17:46:40,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 17:46:40,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 17:46:40,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 17:46:40,017 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 17:46:40,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 17:46:40,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:46:40,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 17:46:40,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 17:46:40,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 17:46:40,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 17:46:40,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 17:46:40,019 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 17:46:40,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 17:46:40,019 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 17:46:40,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 17:46:40,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 17:46:40,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 17:46:40,244 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 17:46:40,245 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 17:46:40,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl [2022-03-01 17:46:40,246 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl' [2022-03-01 17:46:40,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 17:46:40,271 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 17:46:40,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 17:46:40,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 17:46:40,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 17:46:40,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:46:40" (1/1) ... [2022-03-01 17:46:40,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:46:40" (1/1) ... [2022-03-01 17:46:40,289 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 17:46:40,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 17:46:40,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 17:46:40,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 17:46:40,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 17:46:40,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:46:40" (1/1) ... [2022-03-01 17:46:40,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:46:40" (1/1) ... [2022-03-01 17:46:40,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:46:40" (1/1) ... [2022-03-01 17:46:40,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:46:40" (1/1) ... [2022-03-01 17:46:40,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:46:40" (1/1) ... [2022-03-01 17:46:40,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:46:40" (1/1) ... [2022-03-01 17:46:40,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:46:40" (1/1) ... [2022-03-01 17:46:40,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 17:46:40,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 17:46:40,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 17:46:40,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 17:46:40,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:46:40" (1/1) ... [2022-03-01 17:46:40,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:46:40,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:40,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 17:46:40,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 17:46:40,361 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 17:46:40,361 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 17:46:40,361 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 17:46:40,361 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 17:46:40,361 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 17:46:40,361 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 17:46:40,361 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 17:46:40,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 17:46:40,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 17:46:40,362 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 17:46:40,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 17:46:40,362 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 17:46:40,362 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-01 17:46:40,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-01 17:46:40,362 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-01 17:46:40,362 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 17:46:40,400 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 17:46:40,401 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 17:46:40,525 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 17:46:40,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 17:46:40,542 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-01 17:46:40,542 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-03-01 17:46:40,542 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-03-01 17:46:40,543 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-03-01 17:46:40,543 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2022-03-01 17:46:40,544 INFO L202 PluginConnector]: Adding new model parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:46:40 BoogieIcfgContainer [2022-03-01 17:46:40,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 17:46:40,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 17:46:40,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 17:46:40,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 17:46:40,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:46:40" (1/2) ... [2022-03-01 17:46:40,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7afa52 and model type parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 05:46:40, skipping insertion in model container [2022-03-01 17:46:40,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:46:40" (2/2) ... [2022-03-01 17:46:40,555 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1.wvr.bpl [2022-03-01 17:46:40,561 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 17:46:40,561 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 17:46:40,561 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 17:46:40,561 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 17:46:40,615 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-01 17:46:40,681 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 17:46:40,686 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 17:46:40,686 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-01 17:46:40,697 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 29 transitions, 90 flow [2022-03-01 17:46:40,748 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 164 states, 163 states have (on average 3.7484662576687118) internal successors, (611), 163 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 163 states have (on average 3.7484662576687118) internal successors, (611), 163 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:40,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:46:40,768 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:40,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:40,769 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:40,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:40,775 INFO L85 PathProgramCache]: Analyzing trace with hash 530210260, now seen corresponding path program 1 times [2022-03-01 17:46:40,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:40,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466008452] [2022-03-01 17:46:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:40,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:40,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:40,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466008452] [2022-03-01 17:46:40,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466008452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:46:40,919 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:46:40,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 17:46:40,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805746571] [2022-03-01 17:46:40,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:46:40,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 17:46:40,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:40,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 17:46:40,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:46:40,970 INFO L87 Difference]: Start difference. First operand has 164 states, 163 states have (on average 3.7484662576687118) internal successors, (611), 163 states have internal predecessors, (611), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 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) [2022-03-01 17:46:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:41,039 INFO L93 Difference]: Finished difference Result 324 states and 1218 transitions. [2022-03-01 17:46:41,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 17:46:41,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 [2022-03-01 17:46:41,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:41,050 INFO L225 Difference]: With dead ends: 324 [2022-03-01 17:46:41,051 INFO L226 Difference]: Without dead ends: 319 [2022-03-01 17:46:41,052 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 [2022-03-01 17:46:41,054 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:41,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:46:41,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-03-01 17:46:41,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 204. [2022-03-01 17:46:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 3.7339901477832513) internal successors, (758), 203 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 758 transitions. [2022-03-01 17:46:41,125 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 758 transitions. Word has length 15 [2022-03-01 17:46:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:41,126 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 758 transitions. [2022-03-01 17:46:41,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2022-03-01 17:46:41,126 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 758 transitions. [2022-03-01 17:46:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:46:41,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:41,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:41,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 17:46:41,128 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:41,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:41,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1551040747, now seen corresponding path program 1 times [2022-03-01 17:46:41,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:41,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846751065] [2022-03-01 17:46:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:41,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:41,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:41,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846751065] [2022-03-01 17:46:41,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846751065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:41,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513662910] [2022-03-01 17:46:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:41,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:41,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:41,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:41,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 17:46:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:41,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:46:41,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:41,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-01 17:46:41,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513662910] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:46:41,312 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-01 17:46:41,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-03-01 17:46:41,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501716045] [2022-03-01 17:46:41,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:46:41,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:46:41,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:41,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:46:41,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:46:41,314 INFO L87 Difference]: Start difference. First operand 204 states and 758 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:41,414 INFO L93 Difference]: Finished difference Result 500 states and 1907 transitions. [2022-03-01 17:46:41,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:46:41,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:46:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:41,418 INFO L225 Difference]: With dead ends: 500 [2022-03-01 17:46:41,418 INFO L226 Difference]: Without dead ends: 453 [2022-03-01 17:46:41,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:46:41,419 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:41,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 36 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:46:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-03-01 17:46:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 434. [2022-03-01 17:46:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.8960739030023093) internal successors, (1687), 433 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:41,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1687 transitions. [2022-03-01 17:46:41,445 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1687 transitions. Word has length 17 [2022-03-01 17:46:41,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:41,446 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1687 transitions. [2022-03-01 17:46:41,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:41,446 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1687 transitions. [2022-03-01 17:46:41,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:46:41,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:41,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:41,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:41,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:41,651 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:41,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:41,651 INFO L85 PathProgramCache]: Analyzing trace with hash -874800337, now seen corresponding path program 1 times [2022-03-01 17:46:41,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:41,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597500099] [2022-03-01 17:46:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:41,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:41,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:41,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597500099] [2022-03-01 17:46:41,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597500099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:41,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845295627] [2022-03-01 17:46:41,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:41,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:41,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:41,690 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:41,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 17:46:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:41,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:46:41,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:41,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-01 17:46:41,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845295627] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:46:41,811 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-01 17:46:41,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-03-01 17:46:41,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553236839] [2022-03-01 17:46:41,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:46:41,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:46:41,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:41,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:46:41,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:46:41,813 INFO L87 Difference]: Start difference. First operand 434 states and 1687 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:41,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:41,867 INFO L93 Difference]: Finished difference Result 734 states and 2844 transitions. [2022-03-01 17:46:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:46:41,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:46:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:41,871 INFO L225 Difference]: With dead ends: 734 [2022-03-01 17:46:41,872 INFO L226 Difference]: Without dead ends: 715 [2022-03-01 17:46:41,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:46:41,872 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:41,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 39 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:46:41,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-03-01 17:46:41,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 681. [2022-03-01 17:46:41,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 3.9426470588235296) internal successors, (2681), 680 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 2681 transitions. [2022-03-01 17:46:41,900 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 2681 transitions. Word has length 17 [2022-03-01 17:46:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:41,900 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 2681 transitions. [2022-03-01 17:46:41,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 2681 transitions. [2022-03-01 17:46:41,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:41,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:41,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:41,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:42,123 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,SelfDestructingSolverStorable2 [2022-03-01 17:46:42,124 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:42,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1239957648, now seen corresponding path program 1 times [2022-03-01 17:46:42,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:42,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843427390] [2022-03-01 17:46:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:42,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:42,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:42,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843427390] [2022-03-01 17:46:42,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843427390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:42,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157140880] [2022-03-01 17:46:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:42,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:42,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:42,277 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:42,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 17:46:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:42,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:42,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:42,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-03-01 17:46:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:42,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:42,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:42,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:42,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157140880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:42,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:42,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-01 17:46:42,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583838619] [2022-03-01 17:46:42,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:42,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:46:42,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:42,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:46:42,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:42,666 INFO L87 Difference]: Start difference. First operand 681 states and 2681 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:43,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:43,016 INFO L93 Difference]: Finished difference Result 1065 states and 4160 transitions. [2022-03-01 17:46:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:46:43,017 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:43,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:43,023 INFO L225 Difference]: With dead ends: 1065 [2022-03-01 17:46:43,023 INFO L226 Difference]: Without dead ends: 1050 [2022-03-01 17:46:43,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:46:43,024 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 89 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:43,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 188 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 482 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-03-01 17:46:43,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-03-01 17:46:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 711. [2022-03-01 17:46:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 3.9704225352112674) internal successors, (2819), 710 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 2819 transitions. [2022-03-01 17:46:43,051 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 2819 transitions. Word has length 19 [2022-03-01 17:46:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:43,052 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 2819 transitions. [2022-03-01 17:46:43,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:43,052 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 2819 transitions. [2022-03-01 17:46:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:43,054 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:43,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:43,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:43,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:43,275 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:43,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:43,276 INFO L85 PathProgramCache]: Analyzing trace with hash -654623696, now seen corresponding path program 2 times [2022-03-01 17:46:43,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:43,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794677043] [2022-03-01 17:46:43,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:43,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:43,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:43,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794677043] [2022-03-01 17:46:43,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794677043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:43,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539678191] [2022-03-01 17:46:43,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:46:43,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:43,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:43,377 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:43,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 17:46:43,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:46:43,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:43,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:46:43,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:43,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:43,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:43,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:43,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539678191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:43,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:43,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-01 17:46:43,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938068577] [2022-03-01 17:46:43,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:43,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:46:43,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:43,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:46:43,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:46:43,739 INFO L87 Difference]: Start difference. First operand 711 states and 2819 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:44,171 INFO L93 Difference]: Finished difference Result 1057 states and 4144 transitions. [2022-03-01 17:46:44,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:46:44,172 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:44,177 INFO L225 Difference]: With dead ends: 1057 [2022-03-01 17:46:44,177 INFO L226 Difference]: Without dead ends: 1035 [2022-03-01 17:46:44,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:46:44,178 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 200 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:44,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 156 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:46:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-03-01 17:46:44,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 723. [2022-03-01 17:46:44,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.9709141274238227) internal successors, (2867), 722 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2867 transitions. [2022-03-01 17:46:44,222 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2867 transitions. Word has length 19 [2022-03-01 17:46:44,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:44,232 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 2867 transitions. [2022-03-01 17:46:44,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2867 transitions. [2022-03-01 17:46:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:44,234 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:44,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:44,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:44,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:44,447 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:44,448 INFO L85 PathProgramCache]: Analyzing trace with hash 958943038, now seen corresponding path program 3 times [2022-03-01 17:46:44,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:44,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341715277] [2022-03-01 17:46:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:44,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:44,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:44,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341715277] [2022-03-01 17:46:44,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341715277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:44,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436911863] [2022-03-01 17:46:44,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:46:44,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:44,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:44,560 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:44,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 17:46:44,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:46:44,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:44,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:46:44,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:44,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:44,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:44,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:44,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436911863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:44,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:44,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-01 17:46:44,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381325921] [2022-03-01 17:46:44,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:44,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:46:44,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:44,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:46:44,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:46:44,930 INFO L87 Difference]: Start difference. First operand 723 states and 2867 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:45,373 INFO L93 Difference]: Finished difference Result 1048 states and 4116 transitions. [2022-03-01 17:46:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:46:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:45,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:45,379 INFO L225 Difference]: With dead ends: 1048 [2022-03-01 17:46:45,379 INFO L226 Difference]: Without dead ends: 1033 [2022-03-01 17:46:45,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:46:45,380 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 196 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:45,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 151 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:46:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-03-01 17:46:45,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 723. [2022-03-01 17:46:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.9709141274238227) internal successors, (2867), 722 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2867 transitions. [2022-03-01 17:46:45,399 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2867 transitions. Word has length 19 [2022-03-01 17:46:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:45,399 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 2867 transitions. [2022-03-01 17:46:45,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2867 transitions. [2022-03-01 17:46:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:45,401 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:45,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:45,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:45,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:45,615 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:45,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:45,616 INFO L85 PathProgramCache]: Analyzing trace with hash -890460270, now seen corresponding path program 4 times [2022-03-01 17:46:45,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:45,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782879822] [2022-03-01 17:46:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:45,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:45,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:45,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782879822] [2022-03-01 17:46:45,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782879822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:45,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286171688] [2022-03-01 17:46:45,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:46:45,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:45,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:45,719 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:45,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 17:46:45,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:46:45,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:45,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:45,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:45,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-03-01 17:46:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:45,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:45,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:45,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:45,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286171688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:45,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:45,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-01 17:46:45,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290165991] [2022-03-01 17:46:45,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:45,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:46:45,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:45,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:46:45,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:45,980 INFO L87 Difference]: Start difference. First operand 723 states and 2867 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:46,354 INFO L93 Difference]: Finished difference Result 1455 states and 5699 transitions. [2022-03-01 17:46:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:46:46,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:46,362 INFO L225 Difference]: With dead ends: 1455 [2022-03-01 17:46:46,362 INFO L226 Difference]: Without dead ends: 1437 [2022-03-01 17:46:46,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:46:46,363 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 181 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:46,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 191 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 557 Invalid, 0 Unknown, 26 Unchecked, 0.3s Time] [2022-03-01 17:46:46,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2022-03-01 17:46:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 799. [2022-03-01 17:46:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.006265664160401) internal successors, (3197), 798 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3197 transitions. [2022-03-01 17:46:46,387 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3197 transitions. Word has length 19 [2022-03-01 17:46:46,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:46,388 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 3197 transitions. [2022-03-01 17:46:46,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3197 transitions. [2022-03-01 17:46:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:46,390 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:46,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:46,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:46,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:46,603 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:46,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:46,604 INFO L85 PathProgramCache]: Analyzing trace with hash -809061214, now seen corresponding path program 5 times [2022-03-01 17:46:46,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:46,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872493346] [2022-03-01 17:46:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:46,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:46,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:46,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872493346] [2022-03-01 17:46:46,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872493346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:46,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236201019] [2022-03-01 17:46:46,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:46:46,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:46,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:46,696 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:46,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 17:46:46,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:46:46,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:46,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:46,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:46,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:46:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:46,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:46,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:46,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:46,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236201019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:46,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:46,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-01 17:46:46,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930317132] [2022-03-01 17:46:46,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:46,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:46:46,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:46:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:46,955 INFO L87 Difference]: Start difference. First operand 799 states and 3197 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:47,362 INFO L93 Difference]: Finished difference Result 1291 states and 5089 transitions. [2022-03-01 17:46:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:46:47,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:47,369 INFO L225 Difference]: With dead ends: 1291 [2022-03-01 17:46:47,369 INFO L226 Difference]: Without dead ends: 1273 [2022-03-01 17:46:47,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:46:47,369 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:47,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 188 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 543 Invalid, 0 Unknown, 30 Unchecked, 0.3s Time] [2022-03-01 17:46:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-03-01 17:46:47,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 819. [2022-03-01 17:46:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 4.02078239608802) internal successors, (3289), 818 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 3289 transitions. [2022-03-01 17:46:47,391 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 3289 transitions. Word has length 19 [2022-03-01 17:46:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:47,392 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 3289 transitions. [2022-03-01 17:46:47,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:47,392 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 3289 transitions. [2022-03-01 17:46:47,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:47,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:47,394 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:47,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:47,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:47,610 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:47,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:47,611 INFO L85 PathProgramCache]: Analyzing trace with hash 804505520, now seen corresponding path program 6 times [2022-03-01 17:46:47,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:47,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390827800] [2022-03-01 17:46:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:47,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:47,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:47,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390827800] [2022-03-01 17:46:47,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390827800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:47,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746331928] [2022-03-01 17:46:47,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:46:47,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:47,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:47,698 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:47,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 17:46:47,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:46:47,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:47,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:46:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:47,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:47,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:47,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:47,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746331928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:47,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:47,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-01 17:46:47,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43233697] [2022-03-01 17:46:47,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:47,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:47,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:47,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:47,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:47,971 INFO L87 Difference]: Start difference. First operand 819 states and 3289 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:48,104 INFO L93 Difference]: Finished difference Result 1065 states and 4245 transitions. [2022-03-01 17:46:48,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:46:48,104 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:48,109 INFO L225 Difference]: With dead ends: 1065 [2022-03-01 17:46:48,110 INFO L226 Difference]: Without dead ends: 1054 [2022-03-01 17:46:48,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:48,110 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 60 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:48,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 83 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:46:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-03-01 17:46:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 825. [2022-03-01 17:46:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 4.020631067961165) internal successors, (3313), 824 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 3313 transitions. [2022-03-01 17:46:48,129 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 3313 transitions. Word has length 19 [2022-03-01 17:46:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:48,129 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 3313 transitions. [2022-03-01 17:46:48,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 3313 transitions. [2022-03-01 17:46:48,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:48,131 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:48,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:48,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:48,344 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,SelfDestructingSolverStorable8 [2022-03-01 17:46:48,344 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:48,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1396703890, now seen corresponding path program 1 times [2022-03-01 17:46:48,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:48,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728555611] [2022-03-01 17:46:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:48,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:48,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:48,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728555611] [2022-03-01 17:46:48,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728555611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:48,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393332593] [2022-03-01 17:46:48,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:48,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:48,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:48,443 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:48,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 17:46:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:48,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:46:48,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:48,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:48,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-01 17:46:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:48,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:48,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393332593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:48,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:48,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-01 17:46:48,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305867683] [2022-03-01 17:46:48,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:48,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:48,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:48,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:48,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:48,695 INFO L87 Difference]: Start difference. First operand 825 states and 3313 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2022-03-01 17:46:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:48,943 INFO L93 Difference]: Finished difference Result 1245 states and 4941 transitions. [2022-03-01 17:46:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:46:48,943 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 19 [2022-03-01 17:46:48,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:48,948 INFO L225 Difference]: With dead ends: 1245 [2022-03-01 17:46:48,948 INFO L226 Difference]: Without dead ends: 1228 [2022-03-01 17:46:48,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:46:48,949 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 118 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:48,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 133 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:46:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-03-01 17:46:48,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 845. [2022-03-01 17:46:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 4.0260663507109005) internal successors, (3398), 844 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 3398 transitions. [2022-03-01 17:46:48,968 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 3398 transitions. Word has length 19 [2022-03-01 17:46:48,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:48,969 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 3398 transitions. [2022-03-01 17:46:48,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2022-03-01 17:46:48,969 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 3398 transitions. [2022-03-01 17:46:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:48,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:48,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:48,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:49,186 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,SelfDestructingSolverStorable9 [2022-03-01 17:46:49,187 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:49,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:49,187 INFO L85 PathProgramCache]: Analyzing trace with hash -883177038, now seen corresponding path program 2 times [2022-03-01 17:46:49,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:49,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956147098] [2022-03-01 17:46:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:49,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:49,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:49,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956147098] [2022-03-01 17:46:49,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956147098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:49,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245456193] [2022-03-01 17:46:49,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:46:49,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:49,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:49,259 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:49,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 17:46:49,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:46:49,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:49,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:46:49,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:49,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:49,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:49,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:49,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245456193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:49,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:49,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-01 17:46:49,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485479058] [2022-03-01 17:46:49,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:49,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:46:49,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:49,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:46:49,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:46:49,485 INFO L87 Difference]: Start difference. First operand 845 states and 3398 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:49,615 INFO L93 Difference]: Finished difference Result 1126 states and 4474 transitions. [2022-03-01 17:46:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:46:49,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:49,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:49,621 INFO L225 Difference]: With dead ends: 1126 [2022-03-01 17:46:49,621 INFO L226 Difference]: Without dead ends: 1102 [2022-03-01 17:46:49,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:46:49,621 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:49,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 84 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:46:49,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-03-01 17:46:49,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 862. [2022-03-01 17:46:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 4.02555168408827) internal successors, (3466), 861 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 3466 transitions. [2022-03-01 17:46:49,639 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 3466 transitions. Word has length 19 [2022-03-01 17:46:49,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:49,639 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 3466 transitions. [2022-03-01 17:46:49,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:49,640 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 3466 transitions. [2022-03-01 17:46:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:49,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:49,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:49,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:49,855 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,SelfDestructingSolverStorable10 [2022-03-01 17:46:49,855 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:49,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:49,856 INFO L85 PathProgramCache]: Analyzing trace with hash 192534118, now seen corresponding path program 3 times [2022-03-01 17:46:49,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:49,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348212380] [2022-03-01 17:46:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:49,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:49,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:49,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348212380] [2022-03-01 17:46:49,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348212380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:49,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993999908] [2022-03-01 17:46:49,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:46:49,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:49,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:49,924 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:49,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 17:46:49,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:46:49,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:49,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:46:49,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:50,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:50,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:50,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:50,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993999908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:50,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:50,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-01 17:46:50,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764875206] [2022-03-01 17:46:50,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:50,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:50,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:50,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:50,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:50,215 INFO L87 Difference]: Start difference. First operand 862 states and 3466 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:50,408 INFO L93 Difference]: Finished difference Result 1121 states and 4460 transitions. [2022-03-01 17:46:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:46:50,408 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:50,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:50,413 INFO L225 Difference]: With dead ends: 1121 [2022-03-01 17:46:50,413 INFO L226 Difference]: Without dead ends: 1104 [2022-03-01 17:46:50,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:46:50,414 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:50,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 109 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:46:50,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-03-01 17:46:50,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 862. [2022-03-01 17:46:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 4.02555168408827) internal successors, (3466), 861 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 3466 transitions. [2022-03-01 17:46:50,431 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 3466 transitions. Word has length 19 [2022-03-01 17:46:50,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:50,431 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 3466 transitions. [2022-03-01 17:46:50,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:50,431 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 3466 transitions. [2022-03-01 17:46:50,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:50,433 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:50,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:50,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:50,647 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,SelfDestructingSolverStorable11 [2022-03-01 17:46:50,648 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:50,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:50,648 INFO L85 PathProgramCache]: Analyzing trace with hash -987196392, now seen corresponding path program 4 times [2022-03-01 17:46:50,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:50,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494124503] [2022-03-01 17:46:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:50,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:50,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:50,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494124503] [2022-03-01 17:46:50,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494124503] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:50,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138601543] [2022-03-01 17:46:50,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:46:50,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:50,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:50,752 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:50,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 17:46:50,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:46:50,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:50,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:50,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:50,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:50,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:50,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:50,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:50,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138601543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:50,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:50,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-01 17:46:50,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969304290] [2022-03-01 17:46:50,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:50,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:46:50,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:50,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:46:50,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:50,988 INFO L87 Difference]: Start difference. First operand 862 states and 3466 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:51,342 INFO L93 Difference]: Finished difference Result 1647 states and 6509 transitions. [2022-03-01 17:46:51,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:46:51,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:51,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:51,350 INFO L225 Difference]: With dead ends: 1647 [2022-03-01 17:46:51,350 INFO L226 Difference]: Without dead ends: 1629 [2022-03-01 17:46:51,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:46:51,351 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 174 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:51,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 213 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 586 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-03-01 17:46:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2022-03-01 17:46:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 924. [2022-03-01 17:46:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 4.073672806067172) internal successors, (3760), 923 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 3760 transitions. [2022-03-01 17:46:51,374 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 3760 transitions. Word has length 19 [2022-03-01 17:46:51,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:51,375 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 3760 transitions. [2022-03-01 17:46:51,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:51,375 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 3760 transitions. [2022-03-01 17:46:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:51,377 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:51,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:51,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:51,591 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,SelfDestructingSolverStorable12 [2022-03-01 17:46:51,591 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash -399451070, now seen corresponding path program 5 times [2022-03-01 17:46:51,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:51,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929686081] [2022-03-01 17:46:51,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:51,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:51,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:51,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929686081] [2022-03-01 17:46:51,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929686081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:51,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784828337] [2022-03-01 17:46:51,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:46:51,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:51,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:51,658 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:51,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 17:46:51,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:46:51,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:51,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:51,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:51,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:46:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:51,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:51,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:51,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2022-03-01 17:46:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:51,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784828337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:51,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:51,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-01 17:46:51,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755014799] [2022-03-01 17:46:51,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:51,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:46:51,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:46:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:51,914 INFO L87 Difference]: Start difference. First operand 924 states and 3760 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:52,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:52,263 INFO L93 Difference]: Finished difference Result 1473 states and 5876 transitions. [2022-03-01 17:46:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:46:52,264 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:52,268 INFO L225 Difference]: With dead ends: 1473 [2022-03-01 17:46:52,268 INFO L226 Difference]: Without dead ends: 1455 [2022-03-01 17:46:52,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:46:52,269 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 145 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:52,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 177 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:46:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2022-03-01 17:46:52,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 954. [2022-03-01 17:46:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 4.092339979013641) internal successors, (3900), 953 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3900 transitions. [2022-03-01 17:46:52,292 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3900 transitions. Word has length 19 [2022-03-01 17:46:52,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:52,292 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 3900 transitions. [2022-03-01 17:46:52,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:52,292 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3900 transitions. [2022-03-01 17:46:52,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:52,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:52,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:52,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:52,504 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,SelfDestructingSolverStorable13 [2022-03-01 17:46:52,504 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:52,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:52,504 INFO L85 PathProgramCache]: Analyzing trace with hash 676260086, now seen corresponding path program 6 times [2022-03-01 17:46:52,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:52,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47412527] [2022-03-01 17:46:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:52,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:52,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:52,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47412527] [2022-03-01 17:46:52,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47412527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:52,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912861974] [2022-03-01 17:46:52,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:46:52,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:52,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:52,571 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:52,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 17:46:52,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:46:52,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:52,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:46:52,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:52,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:52,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:52,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:52,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912861974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:52,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:52,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-01 17:46:52,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125180912] [2022-03-01 17:46:52,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:52,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:46:52,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:52,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:46:52,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:46:52,831 INFO L87 Difference]: Start difference. First operand 954 states and 3900 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:52,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:52,986 INFO L93 Difference]: Finished difference Result 1199 states and 4849 transitions. [2022-03-01 17:46:52,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:46:52,986 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:52,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:52,990 INFO L225 Difference]: With dead ends: 1199 [2022-03-01 17:46:52,990 INFO L226 Difference]: Without dead ends: 1188 [2022-03-01 17:46:52,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:52,991 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:52,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 103 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:46:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-03-01 17:46:53,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 958. [2022-03-01 17:46:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 4.091954022988506) internal successors, (3916), 957 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3916 transitions. [2022-03-01 17:46:53,009 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3916 transitions. Word has length 19 [2022-03-01 17:46:53,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:53,009 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 3916 transitions. [2022-03-01 17:46:53,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3916 transitions. [2022-03-01 17:46:53,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:53,011 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:53,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:53,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:53,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:53,223 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:53,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:53,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1214380458, now seen corresponding path program 1 times [2022-03-01 17:46:53,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:53,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515597419] [2022-03-01 17:46:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:53,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:53,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:53,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515597419] [2022-03-01 17:46:53,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515597419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:53,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105071617] [2022-03-01 17:46:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:53,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:53,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:53,273 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:53,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 17:46:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:53,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:53,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:53,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-03-01 17:46:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:53,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:53,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:53,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:53,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105071617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:53,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:53,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-01 17:46:53,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044505598] [2022-03-01 17:46:53,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:53,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:46:53,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:53,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:46:53,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:53,531 INFO L87 Difference]: Start difference. First operand 958 states and 3916 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:53,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:53,900 INFO L93 Difference]: Finished difference Result 1665 states and 6652 transitions. [2022-03-01 17:46:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:46:53,901 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:53,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:53,905 INFO L225 Difference]: With dead ends: 1665 [2022-03-01 17:46:53,905 INFO L226 Difference]: Without dead ends: 1647 [2022-03-01 17:46:53,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:46:53,905 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 150 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:53,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 216 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 648 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-03-01 17:46:53,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2022-03-01 17:46:53,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1005. [2022-03-01 17:46:53,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 4.114541832669323) internal successors, (4131), 1004 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 4131 transitions. [2022-03-01 17:46:53,929 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 4131 transitions. Word has length 19 [2022-03-01 17:46:53,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:53,929 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 4131 transitions. [2022-03-01 17:46:53,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:53,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 4131 transitions. [2022-03-01 17:46:53,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:53,931 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:53,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:53,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:54,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-01 17:46:54,147 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:54,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:54,147 INFO L85 PathProgramCache]: Analyzing trace with hash 883922358, now seen corresponding path program 1 times [2022-03-01 17:46:54,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:54,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554237917] [2022-03-01 17:46:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:54,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:54,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:54,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554237917] [2022-03-01 17:46:54,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554237917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:54,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702753441] [2022-03-01 17:46:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:54,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:54,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:54,224 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:54,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 17:46:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:54,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:54,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:54,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:46:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:54,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:54,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:54,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:54,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702753441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:54,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:54,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-01 17:46:54,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814358361] [2022-03-01 17:46:54,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:54,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:46:54,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:54,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:46:54,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:54,436 INFO L87 Difference]: Start difference. First operand 1005 states and 4131 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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) [2022-03-01 17:46:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:54,740 INFO L93 Difference]: Finished difference Result 1782 states and 7130 transitions. [2022-03-01 17:46:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:46:54,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 19 [2022-03-01 17:46:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:54,745 INFO L225 Difference]: With dead ends: 1782 [2022-03-01 17:46:54,745 INFO L226 Difference]: Without dead ends: 1764 [2022-03-01 17:46:54,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:46:54,746 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 198 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:54,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 193 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 521 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-03-01 17:46:54,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-03-01 17:46:54,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1034. [2022-03-01 17:46:54,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 4.139399806389158) internal successors, (4276), 1033 states have internal predecessors, (4276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 4276 transitions. [2022-03-01 17:46:54,767 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 4276 transitions. Word has length 19 [2022-03-01 17:46:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:54,768 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 4276 transitions. [2022-03-01 17:46:54,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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) [2022-03-01 17:46:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 4276 transitions. [2022-03-01 17:46:54,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:54,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:54,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:54,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:54,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-01 17:46:54,986 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:54,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:54,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1685216246, now seen corresponding path program 2 times [2022-03-01 17:46:54,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:54,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513039252] [2022-03-01 17:46:54,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:54,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:55,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:55,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513039252] [2022-03-01 17:46:55,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513039252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:55,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063472270] [2022-03-01 17:46:55,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:46:55,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:55,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:55,094 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:55,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 17:46:55,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:46:55,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:55,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:46:55,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:55,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:55,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:55,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:55,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063472270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:55,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:55,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-01 17:46:55,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148494054] [2022-03-01 17:46:55,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:55,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:46:55,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:55,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:46:55,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:46:55,423 INFO L87 Difference]: Start difference. First operand 1034 states and 4276 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:55,604 INFO L93 Difference]: Finished difference Result 1249 states and 5105 transitions. [2022-03-01 17:46:55,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:46:55,605 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:55,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:55,624 INFO L225 Difference]: With dead ends: 1249 [2022-03-01 17:46:55,624 INFO L226 Difference]: Without dead ends: 1240 [2022-03-01 17:46:55,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:46:55,625 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 110 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:55,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 105 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:46:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-03-01 17:46:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1040. [2022-03-01 17:46:55,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 4.138594802694899) internal successors, (4300), 1039 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 4300 transitions. [2022-03-01 17:46:55,644 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 4300 transitions. Word has length 19 [2022-03-01 17:46:55,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:55,644 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 4300 transitions. [2022-03-01 17:46:55,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 4300 transitions. [2022-03-01 17:46:55,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:55,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:55,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:55,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:55,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 17:46:55,860 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:55,860 INFO L85 PathProgramCache]: Analyzing trace with hash -192590060, now seen corresponding path program 3 times [2022-03-01 17:46:55,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:55,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242483590] [2022-03-01 17:46:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:55,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:55,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:55,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242483590] [2022-03-01 17:46:55,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242483590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:55,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705996544] [2022-03-01 17:46:55,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:46:55,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:55,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:55,944 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:55,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 17:46:55,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:46:55,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:55,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:46:55,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:56,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:56,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:56,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:56,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705996544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:56,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:56,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-01 17:46:56,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783747268] [2022-03-01 17:46:56,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:56,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:46:56,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:56,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:46:56,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:46:56,268 INFO L87 Difference]: Start difference. First operand 1040 states and 4300 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:56,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:56,502 INFO L93 Difference]: Finished difference Result 1247 states and 5101 transitions. [2022-03-01 17:46:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:46:56,502 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:56,506 INFO L225 Difference]: With dead ends: 1247 [2022-03-01 17:46:56,506 INFO L226 Difference]: Without dead ends: 1235 [2022-03-01 17:46:56,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:46:56,507 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:56,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 127 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:46:56,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2022-03-01 17:46:56,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1049. [2022-03-01 17:46:56,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 4.137404580152672) internal successors, (4336), 1048 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 4336 transitions. [2022-03-01 17:46:56,545 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 4336 transitions. Word has length 19 [2022-03-01 17:46:56,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:56,545 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 4336 transitions. [2022-03-01 17:46:56,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:56,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 4336 transitions. [2022-03-01 17:46:56,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:56,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:56,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:56,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-01 17:46:56,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:56,764 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:56,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:56,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1898931946, now seen corresponding path program 2 times [2022-03-01 17:46:56,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:56,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269940050] [2022-03-01 17:46:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:56,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:56,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:56,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269940050] [2022-03-01 17:46:56,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269940050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:56,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498312636] [2022-03-01 17:46:56,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:46:56,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:56,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:56,848 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:56,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 17:46:56,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:46:56,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:46:56,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:56,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:56,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:57,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:57,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498312636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:57,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:57,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-01 17:46:57,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069824224] [2022-03-01 17:46:57,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:57,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:46:57,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:57,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:46:57,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:46:57,185 INFO L87 Difference]: Start difference. First operand 1049 states and 4336 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:57,415 INFO L93 Difference]: Finished difference Result 1276 states and 5213 transitions. [2022-03-01 17:46:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:46:57,415 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:57,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:57,419 INFO L225 Difference]: With dead ends: 1276 [2022-03-01 17:46:57,420 INFO L226 Difference]: Without dead ends: 1267 [2022-03-01 17:46:57,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:46:57,420 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:57,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 130 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:46:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-01 17:46:57,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1057. [2022-03-01 17:46:57,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 4.136363636363637) internal successors, (4368), 1056 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:57,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 4368 transitions. [2022-03-01 17:46:57,441 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 4368 transitions. Word has length 19 [2022-03-01 17:46:57,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:57,442 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 4368 transitions. [2022-03-01 17:46:57,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:57,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 4368 transitions. [2022-03-01 17:46:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:57,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:57,444 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:57,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-01 17:46:57,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:57,660 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:57,660 INFO L85 PathProgramCache]: Analyzing trace with hash -166615788, now seen corresponding path program 3 times [2022-03-01 17:46:57,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:57,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362365684] [2022-03-01 17:46:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:57,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:57,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:57,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362365684] [2022-03-01 17:46:57,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362365684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:57,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23456057] [2022-03-01 17:46:57,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:46:57,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:57,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:57,744 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:57,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 17:46:57,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:46:57,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:57,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:46:57,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:57,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:57,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:46:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:57,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:58,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23456057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:58,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:58,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-01 17:46:58,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378977100] [2022-03-01 17:46:58,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:58,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:46:58,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:58,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:46:58,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:46:58,074 INFO L87 Difference]: Start difference. First operand 1057 states and 4368 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:58,283 INFO L93 Difference]: Finished difference Result 1275 states and 5211 transitions. [2022-03-01 17:46:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:46:58,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:58,286 INFO L225 Difference]: With dead ends: 1275 [2022-03-01 17:46:58,287 INFO L226 Difference]: Without dead ends: 1263 [2022-03-01 17:46:58,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:46:58,287 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 101 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:58,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 108 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:46:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2022-03-01 17:46:58,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1061. [2022-03-01 17:46:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 4.1358490566037736) internal successors, (4384), 1060 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:58,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 4384 transitions. [2022-03-01 17:46:58,309 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 4384 transitions. Word has length 19 [2022-03-01 17:46:58,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:58,309 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 4384 transitions. [2022-03-01 17:46:58,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:58,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 4384 transitions. [2022-03-01 17:46:58,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:58,311 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:58,311 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:58,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 17:46:58,527 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,SelfDestructingSolverStorable20 [2022-03-01 17:46:58,527 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:58,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:58,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1239505502, now seen corresponding path program 4 times [2022-03-01 17:46:58,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:58,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76584448] [2022-03-01 17:46:58,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:58,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:58,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:58,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76584448] [2022-03-01 17:46:58,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76584448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:58,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300278432] [2022-03-01 17:46:58,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:46:58,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:58,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:58,602 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:58,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 17:46:58,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:46:58,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:58,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:58,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:58,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:46:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:58,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:58,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:58,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:58,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300278432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:58,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:58,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-01 17:46:58,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131470766] [2022-03-01 17:46:58,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:58,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:46:58,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:58,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:46:58,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:58,882 INFO L87 Difference]: Start difference. First operand 1061 states and 4384 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:59,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:59,152 INFO L93 Difference]: Finished difference Result 1368 states and 5540 transitions. [2022-03-01 17:46:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:46:59,152 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:59,155 INFO L225 Difference]: With dead ends: 1368 [2022-03-01 17:46:59,156 INFO L226 Difference]: Without dead ends: 1346 [2022-03-01 17:46:59,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:46:59,156 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 149 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:59,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 141 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 345 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-03-01 17:46:59,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-03-01 17:46:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1071. [2022-03-01 17:46:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 4.132710280373832) internal successors, (4422), 1070 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 4422 transitions. [2022-03-01 17:46:59,179 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 4422 transitions. Word has length 19 [2022-03-01 17:46:59,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:59,179 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 4422 transitions. [2022-03-01 17:46:59,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 4422 transitions. [2022-03-01 17:46:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:59,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:59,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:46:59,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-01 17:46:59,398 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,SelfDestructingSolverStorable21 [2022-03-01 17:46:59,398 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:46:59,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:46:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1177655488, now seen corresponding path program 5 times [2022-03-01 17:46:59,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:46:59,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470091493] [2022-03-01 17:46:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:46:59,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:46:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:46:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:59,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:46:59,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470091493] [2022-03-01 17:46:59,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470091493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:46:59,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912183948] [2022-03-01 17:46:59,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:46:59,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:46:59,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:46:59,464 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:46:59,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 17:46:59,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:46:59,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:46:59,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:46:59,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:46:59,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:46:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:59,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:46:59,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:46:59,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:46:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:46:59,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912183948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:46:59,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:46:59,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-01 17:46:59,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783392597] [2022-03-01 17:46:59,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:46:59,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:46:59,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:46:59,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:46:59,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:46:59,678 INFO L87 Difference]: Start difference. First operand 1071 states and 4422 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:59,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:46:59,970 INFO L93 Difference]: Finished difference Result 1366 states and 5541 transitions. [2022-03-01 17:46:59,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:46:59,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:46:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:46:59,973 INFO L225 Difference]: With dead ends: 1366 [2022-03-01 17:46:59,973 INFO L226 Difference]: Without dead ends: 1351 [2022-03-01 17:46:59,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:46:59,974 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 110 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:46:59,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 173 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 457 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-03-01 17:46:59,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-03-01 17:46:59,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1080. [2022-03-01 17:46:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 4.137164040778498) internal successors, (4464), 1079 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 4464 transitions. [2022-03-01 17:46:59,994 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 4464 transitions. Word has length 19 [2022-03-01 17:46:59,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:46:59,994 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 4464 transitions. [2022-03-01 17:46:59,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:46:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 4464 transitions. [2022-03-01 17:46:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:46:59,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:46:59,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:00,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:00,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:00,211 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:00,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:00,212 INFO L85 PathProgramCache]: Analyzing trace with hash -430659694, now seen corresponding path program 6 times [2022-03-01 17:47:00,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:00,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454032983] [2022-03-01 17:47:00,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:00,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:00,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:00,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454032983] [2022-03-01 17:47:00,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454032983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:00,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784605522] [2022-03-01 17:47:00,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:47:00,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:00,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:00,275 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:00,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 17:47:00,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:47:00,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:00,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:47:00,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:00,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:00,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-01 17:47:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:00,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:00,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784605522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:00,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:00,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-01 17:47:00,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638021649] [2022-03-01 17:47:00,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:00,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:47:00,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:00,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:47:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:47:00,513 INFO L87 Difference]: Start difference. First operand 1080 states and 4464 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2022-03-01 17:47:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:00,752 INFO L93 Difference]: Finished difference Result 1366 states and 5546 transitions. [2022-03-01 17:47:00,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:47:00,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 19 [2022-03-01 17:47:00,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:00,755 INFO L225 Difference]: With dead ends: 1366 [2022-03-01 17:47:00,755 INFO L226 Difference]: Without dead ends: 1351 [2022-03-01 17:47:00,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:47:00,755 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 107 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:00,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 155 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:47:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-03-01 17:47:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1092. [2022-03-01 17:47:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 4.139321723189735) internal successors, (4516), 1091 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 4516 transitions. [2022-03-01 17:47:00,774 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 4516 transitions. Word has length 19 [2022-03-01 17:47:00,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:00,774 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 4516 transitions. [2022-03-01 17:47:00,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2022-03-01 17:47:00,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 4516 transitions. [2022-03-01 17:47:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:47:00,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:00,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:00,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:00,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:00,991 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:00,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:00,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1884927084, now seen corresponding path program 4 times [2022-03-01 17:47:00,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:00,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967904128] [2022-03-01 17:47:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:00,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:01,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:01,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967904128] [2022-03-01 17:47:01,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967904128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:01,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470083630] [2022-03-01 17:47:01,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:47:01,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:01,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:01,055 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:01,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 17:47:01,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:47:01,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:01,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:47:01,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:01,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:01,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:47:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:01,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:01,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470083630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:01,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:01,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-01 17:47:01,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497300752] [2022-03-01 17:47:01,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:01,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:47:01,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:47:01,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:47:01,299 INFO L87 Difference]: Start difference. First operand 1092 states and 4516 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2022-03-01 17:47:01,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:01,435 INFO L93 Difference]: Finished difference Result 1303 states and 5318 transitions. [2022-03-01 17:47:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:47:01,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 19 [2022-03-01 17:47:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:01,438 INFO L225 Difference]: With dead ends: 1303 [2022-03-01 17:47:01,438 INFO L226 Difference]: Without dead ends: 1279 [2022-03-01 17:47:01,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:47:01,439 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 94 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:01,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 78 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:47:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-03-01 17:47:01,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1105. [2022-03-01 17:47:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 4.134963768115942) internal successors, (4565), 1104 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 4565 transitions. [2022-03-01 17:47:01,457 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 4565 transitions. Word has length 19 [2022-03-01 17:47:01,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:01,457 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 4565 transitions. [2022-03-01 17:47:01,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2022-03-01 17:47:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 4565 transitions. [2022-03-01 17:47:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:47:01,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:01,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:01,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-01 17:47:01,660 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,SelfDestructingSolverStorable24 [2022-03-01 17:47:01,660 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:01,661 INFO L85 PathProgramCache]: Analyzing trace with hash -152610926, now seen corresponding path program 5 times [2022-03-01 17:47:01,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:01,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68455009] [2022-03-01 17:47:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:01,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:01,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:01,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68455009] [2022-03-01 17:47:01,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68455009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:01,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92685131] [2022-03-01 17:47:01,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:47:01,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:01,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:01,734 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:01,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 17:47:01,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:47:01,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:01,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:47:01,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:01,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:47:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:01,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:01,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:01,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:01,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92685131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:01,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:01,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-01 17:47:01,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131509803] [2022-03-01 17:47:01,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:01,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:47:01,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:01,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:47:01,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:47:01,968 INFO L87 Difference]: Start difference. First operand 1105 states and 4565 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:02,280 INFO L93 Difference]: Finished difference Result 1433 states and 5804 transitions. [2022-03-01 17:47:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:47:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:47:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:02,284 INFO L225 Difference]: With dead ends: 1433 [2022-03-01 17:47:02,284 INFO L226 Difference]: Without dead ends: 1416 [2022-03-01 17:47:02,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:47:02,284 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 131 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:02,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 162 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 436 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-03-01 17:47:02,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-03-01 17:47:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1109. [2022-03-01 17:47:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 4.134476534296029) internal successors, (4581), 1108 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 4581 transitions. [2022-03-01 17:47:02,310 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 4581 transitions. Word has length 19 [2022-03-01 17:47:02,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:02,310 INFO L470 AbstractCegarLoop]: Abstraction has 1109 states and 4581 transitions. [2022-03-01 17:47:02,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 4581 transitions. [2022-03-01 17:47:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:47:02,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:02,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:02,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-01 17:47:02,527 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,SelfDestructingSolverStorable25 [2022-03-01 17:47:02,527 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:02,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2035572250, now seen corresponding path program 6 times [2022-03-01 17:47:02,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:02,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160437911] [2022-03-01 17:47:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:02,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:02,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:02,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160437911] [2022-03-01 17:47:02,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160437911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:02,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65478134] [2022-03-01 17:47:02,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:47:02,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:02,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:02,620 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:02,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 17:47:02,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:47:02,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:02,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:47:02,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:02,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:02,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-01 17:47:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:02,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:02,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65478134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:02,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:02,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-01 17:47:02,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071574012] [2022-03-01 17:47:02,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:02,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:47:02,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:02,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:47:02,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:47:02,965 INFO L87 Difference]: Start difference. First operand 1109 states and 4581 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:03,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:03,359 INFO L93 Difference]: Finished difference Result 1751 states and 7027 transitions. [2022-03-01 17:47:03,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:47:03,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:47:03,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:03,363 INFO L225 Difference]: With dead ends: 1751 [2022-03-01 17:47:03,363 INFO L226 Difference]: Without dead ends: 1717 [2022-03-01 17:47:03,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:47:03,368 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 199 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:03,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 160 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:47:03,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-03-01 17:47:03,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1143. [2022-03-01 17:47:03,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 4.158493870402802) internal successors, (4749), 1142 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:03,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 4749 transitions. [2022-03-01 17:47:03,395 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 4749 transitions. Word has length 19 [2022-03-01 17:47:03,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:03,395 INFO L470 AbstractCegarLoop]: Abstraction has 1143 states and 4749 transitions. [2022-03-01 17:47:03,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:03,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 4749 transitions. [2022-03-01 17:47:03,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:47:03,397 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:03,397 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:03,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:03,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 17:47:03,611 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:03,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:03,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2067340975, now seen corresponding path program 7 times [2022-03-01 17:47:03,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:03,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61963734] [2022-03-01 17:47:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:03,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:03,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:03,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61963734] [2022-03-01 17:47:03,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61963734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:03,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229070656] [2022-03-01 17:47:03,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:47:03,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:03,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:03,635 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:03,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 17:47:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:03,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:47:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:03,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:03,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229070656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:03,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:03,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-03-01 17:47:03,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295341664] [2022-03-01 17:47:03,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:03,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:47:03,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:47:03,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:47:03,729 INFO L87 Difference]: Start difference. First operand 1143 states and 4749 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:03,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:03,803 INFO L93 Difference]: Finished difference Result 2141 states and 8584 transitions. [2022-03-01 17:47:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:47:03,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:47:03,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:03,807 INFO L225 Difference]: With dead ends: 2141 [2022-03-01 17:47:03,807 INFO L226 Difference]: Without dead ends: 2077 [2022-03-01 17:47:03,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:47:03,808 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 117 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:03,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 80 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:47:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2022-03-01 17:47:03,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1697. [2022-03-01 17:47:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 4.147405660377358) internal successors, (7034), 1696 states have internal predecessors, (7034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 7034 transitions. [2022-03-01 17:47:03,838 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 7034 transitions. Word has length 21 [2022-03-01 17:47:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:03,838 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 7034 transitions. [2022-03-01 17:47:03,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 7034 transitions. [2022-03-01 17:47:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:47:03,841 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:03,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:03,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:04,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-01 17:47:04,057 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:04,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1150453651, now seen corresponding path program 8 times [2022-03-01 17:47:04,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:04,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298744448] [2022-03-01 17:47:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:04,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:04,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:04,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298744448] [2022-03-01 17:47:04,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298744448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:04,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611578445] [2022-03-01 17:47:04,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:47:04,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:04,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:04,087 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:04,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 17:47:04,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:04,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:04,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:47:04,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:04,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-01 17:47:04,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611578445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:47:04,149 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-01 17:47:04,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-03-01 17:47:04,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77488080] [2022-03-01 17:47:04,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:47:04,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:47:04,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:04,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:47:04,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:47:04,150 INFO L87 Difference]: Start difference. First operand 1697 states and 7034 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:04,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:04,195 INFO L93 Difference]: Finished difference Result 2538 states and 10335 transitions. [2022-03-01 17:47:04,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:47:04,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:47:04,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:04,201 INFO L225 Difference]: With dead ends: 2538 [2022-03-01 17:47:04,201 INFO L226 Difference]: Without dead ends: 2465 [2022-03-01 17:47:04,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:47:04,201 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:04,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 46 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:47:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2022-03-01 17:47:04,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1876. [2022-03-01 17:47:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 4.088533333333333) internal successors, (7666), 1875 states have internal predecessors, (7666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 7666 transitions. [2022-03-01 17:47:04,233 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 7666 transitions. Word has length 21 [2022-03-01 17:47:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:04,233 INFO L470 AbstractCegarLoop]: Abstraction has 1876 states and 7666 transitions. [2022-03-01 17:47:04,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 7666 transitions. [2022-03-01 17:47:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:47:04,236 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:04,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:04,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:04,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-01 17:47:04,437 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:04,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1018597773, now seen corresponding path program 9 times [2022-03-01 17:47:04,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:04,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348558128] [2022-03-01 17:47:04,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:04,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:47:04,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:04,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348558128] [2022-03-01 17:47:04,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348558128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:04,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227813255] [2022-03-01 17:47:04,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:47:04,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:04,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:04,461 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:04,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 17:47:04,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:47:04,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:04,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:47:04,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:04,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:04,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227813255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:04,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:04,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2022-03-01 17:47:04,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036154596] [2022-03-01 17:47:04,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:04,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:47:04,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:04,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:47:04,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:47:04,556 INFO L87 Difference]: Start difference. First operand 1876 states and 7666 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:04,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:04,645 INFO L93 Difference]: Finished difference Result 2927 states and 11711 transitions. [2022-03-01 17:47:04,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:47:04,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 21 [2022-03-01 17:47:04,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:04,652 INFO L225 Difference]: With dead ends: 2927 [2022-03-01 17:47:04,652 INFO L226 Difference]: Without dead ends: 2912 [2022-03-01 17:47:04,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:47:04,652 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 109 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:04,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 114 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:47:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2022-03-01 17:47:04,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2499. [2022-03-01 17:47:04,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 4.125700560448359) internal successors, (10306), 2498 states have internal predecessors, (10306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 10306 transitions. [2022-03-01 17:47:04,721 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 10306 transitions. Word has length 21 [2022-03-01 17:47:04,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:04,721 INFO L470 AbstractCegarLoop]: Abstraction has 2499 states and 10306 transitions. [2022-03-01 17:47:04,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:04,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 10306 transitions. [2022-03-01 17:47:04,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:04,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:04,726 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:04,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-01 17:47:04,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:04,928 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:04,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:04,929 INFO L85 PathProgramCache]: Analyzing trace with hash -430491024, now seen corresponding path program 10 times [2022-03-01 17:47:04,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:04,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410221564] [2022-03-01 17:47:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:04,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:05,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:05,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410221564] [2022-03-01 17:47:05,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410221564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:05,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617346284] [2022-03-01 17:47:05,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:47:05,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:05,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:05,105 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:05,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 17:47:05,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:47:05,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:05,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:05,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:05,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:05,307 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 20 treesize of output 36 [2022-03-01 17:47:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:05,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:05,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:05,978 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 21 treesize of output 42 [2022-03-01 17:47:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:06,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617346284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:06,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:06,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-01 17:47:06,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327418939] [2022-03-01 17:47:06,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:06,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:47:06,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:06,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:47:06,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:47:06,089 INFO L87 Difference]: Start difference. First operand 2499 states and 10306 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:06,839 INFO L93 Difference]: Finished difference Result 2830 states and 11592 transitions. [2022-03-01 17:47:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:47:06,839 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:06,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:06,845 INFO L225 Difference]: With dead ends: 2830 [2022-03-01 17:47:06,846 INFO L226 Difference]: Without dead ends: 2825 [2022-03-01 17:47:06,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:47:06,846 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 177 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:06,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 577 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1140 Invalid, 0 Unknown, 230 Unchecked, 0.5s Time] [2022-03-01 17:47:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2022-03-01 17:47:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 2546. [2022-03-01 17:47:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 4.137917485265226) internal successors, (10531), 2545 states have internal predecessors, (10531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 10531 transitions. [2022-03-01 17:47:06,889 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 10531 transitions. Word has length 23 [2022-03-01 17:47:06,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:06,889 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 10531 transitions. [2022-03-01 17:47:06,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:06,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 10531 transitions. [2022-03-01 17:47:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:06,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:06,895 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:06,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-01 17:47:07,099 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,SelfDestructingSolverStorable30 [2022-03-01 17:47:07,099 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:07,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:07,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1828320050, now seen corresponding path program 11 times [2022-03-01 17:47:07,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:07,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546815719] [2022-03-01 17:47:07,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:07,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:07,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:07,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546815719] [2022-03-01 17:47:07,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546815719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:07,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044769288] [2022-03-01 17:47:07,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:47:07,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:07,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:07,141 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:07,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 17:47:07,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:47:07,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:07,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:47:07,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:07,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:07,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044769288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:07,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:07,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-03-01 17:47:07,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941252736] [2022-03-01 17:47:07,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:07,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:47:07,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:07,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:47:07,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:47:07,273 INFO L87 Difference]: Start difference. First operand 2546 states and 10531 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:07,440 INFO L93 Difference]: Finished difference Result 4295 states and 17292 transitions. [2022-03-01 17:47:07,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:47:07,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:07,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:07,450 INFO L225 Difference]: With dead ends: 4295 [2022-03-01 17:47:07,450 INFO L226 Difference]: Without dead ends: 3970 [2022-03-01 17:47:07,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:47:07,451 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 126 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:07,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 149 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:47:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2022-03-01 17:47:07,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 2547. [2022-03-01 17:47:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 4.129615082482325) internal successors, (10514), 2546 states have internal predecessors, (10514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 10514 transitions. [2022-03-01 17:47:07,502 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 10514 transitions. Word has length 23 [2022-03-01 17:47:07,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:07,503 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 10514 transitions. [2022-03-01 17:47:07,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:07,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 10514 transitions. [2022-03-01 17:47:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:07,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:07,521 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:07,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-01 17:47:07,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:07,721 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:07,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:07,722 INFO L85 PathProgramCache]: Analyzing trace with hash -565278928, now seen corresponding path program 12 times [2022-03-01 17:47:07,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:07,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630602627] [2022-03-01 17:47:07,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:07,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:07,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:07,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630602627] [2022-03-01 17:47:07,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630602627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:07,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488329342] [2022-03-01 17:47:07,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:47:07,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:07,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:07,887 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:07,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 17:47:07,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:47:07,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:07,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:08,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:08,075 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 20 treesize of output 36 [2022-03-01 17:47:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:08,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:08,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:08,609 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 21 treesize of output 42 [2022-03-01 17:47:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:08,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488329342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:08,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:08,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-01 17:47:08,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506689973] [2022-03-01 17:47:08,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:08,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:47:08,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:08,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:47:08,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:47:08,721 INFO L87 Difference]: Start difference. First operand 2547 states and 10514 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:09,620 INFO L93 Difference]: Finished difference Result 3014 states and 12349 transitions. [2022-03-01 17:47:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:47:09,620 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:09,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:09,627 INFO L225 Difference]: With dead ends: 3014 [2022-03-01 17:47:09,627 INFO L226 Difference]: Without dead ends: 2992 [2022-03-01 17:47:09,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=1339, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:47:09,627 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 187 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:09,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 749 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1436 Invalid, 0 Unknown, 239 Unchecked, 0.6s Time] [2022-03-01 17:47:09,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2022-03-01 17:47:09,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2575. [2022-03-01 17:47:09,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2574 states have (on average 4.134421134421134) internal successors, (10642), 2574 states have internal predecessors, (10642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 10642 transitions. [2022-03-01 17:47:09,670 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 10642 transitions. Word has length 23 [2022-03-01 17:47:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:09,670 INFO L470 AbstractCegarLoop]: Abstraction has 2575 states and 10642 transitions. [2022-03-01 17:47:09,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 10642 transitions. [2022-03-01 17:47:09,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:09,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:09,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:09,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:09,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:09,891 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:09,891 INFO L85 PathProgramCache]: Analyzing trace with hash 20055024, now seen corresponding path program 13 times [2022-03-01 17:47:09,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:09,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566410701] [2022-03-01 17:47:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:09,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:10,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:10,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566410701] [2022-03-01 17:47:10,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566410701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:10,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782821048] [2022-03-01 17:47:10,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:47:10,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:10,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:10,099 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:10,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 17:47:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:10,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:10,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:10,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:10,264 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 21 treesize of output 37 [2022-03-01 17:47:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:10,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:10,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:10,846 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 21 treesize of output 42 [2022-03-01 17:47:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:10,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782821048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:10,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:10,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-01 17:47:10,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979155086] [2022-03-01 17:47:10,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:10,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:47:10,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:10,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:47:10,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:47:10,938 INFO L87 Difference]: Start difference. First operand 2575 states and 10642 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:11,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:11,992 INFO L93 Difference]: Finished difference Result 3169 states and 12922 transitions. [2022-03-01 17:47:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:47:11,993 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:11,999 INFO L225 Difference]: With dead ends: 3169 [2022-03-01 17:47:11,999 INFO L226 Difference]: Without dead ends: 3117 [2022-03-01 17:47:12,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=322, Invalid=1840, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 17:47:12,000 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 256 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:12,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 655 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1234 Invalid, 0 Unknown, 415 Unchecked, 0.5s Time] [2022-03-01 17:47:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2022-03-01 17:47:12,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2607. [2022-03-01 17:47:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2607 states, 2606 states have (on average 4.13584036838066) internal successors, (10778), 2606 states have internal predecessors, (10778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 10778 transitions. [2022-03-01 17:47:12,054 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 10778 transitions. Word has length 23 [2022-03-01 17:47:12,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:12,054 INFO L470 AbstractCegarLoop]: Abstraction has 2607 states and 10778 transitions. [2022-03-01 17:47:12,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:12,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 10778 transitions. [2022-03-01 17:47:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:12,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:12,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:12,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-01 17:47:12,259 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,SelfDestructingSolverStorable33 [2022-03-01 17:47:12,259 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:12,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1633621758, now seen corresponding path program 14 times [2022-03-01 17:47:12,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:12,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260895488] [2022-03-01 17:47:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:12,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:12,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260895488] [2022-03-01 17:47:12,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260895488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:12,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520765787] [2022-03-01 17:47:12,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:47:12,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:12,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:12,434 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:12,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 17:47:12,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:12,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:12,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:12,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:12,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:12,630 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 25 treesize of output 41 [2022-03-01 17:47:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:13,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:13,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:13,173 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 21 treesize of output 42 [2022-03-01 17:47:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:13,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520765787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:13,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:13,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-01 17:47:13,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495010538] [2022-03-01 17:47:13,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:13,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:47:13,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:13,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:47:13,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:47:13,271 INFO L87 Difference]: Start difference. First operand 2607 states and 10778 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:14,222 INFO L93 Difference]: Finished difference Result 3007 states and 12324 transitions. [2022-03-01 17:47:14,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:47:14,223 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:14,229 INFO L225 Difference]: With dead ends: 3007 [2022-03-01 17:47:14,230 INFO L226 Difference]: Without dead ends: 2986 [2022-03-01 17:47:14,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:47:14,230 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 225 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:14,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 567 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1035 Invalid, 0 Unknown, 338 Unchecked, 0.5s Time] [2022-03-01 17:47:14,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2022-03-01 17:47:14,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 2611. [2022-03-01 17:47:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 4.135632183908046) internal successors, (10794), 2610 states have internal predecessors, (10794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 10794 transitions. [2022-03-01 17:47:14,271 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 10794 transitions. Word has length 23 [2022-03-01 17:47:14,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:14,271 INFO L470 AbstractCegarLoop]: Abstraction has 2611 states and 10794 transitions. [2022-03-01 17:47:14,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:14,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 10794 transitions. [2022-03-01 17:47:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:14,276 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:14,276 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:14,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:14,491 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,SelfDestructingSolverStorable34 [2022-03-01 17:47:14,491 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:14,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:14,491 INFO L85 PathProgramCache]: Analyzing trace with hash -410841410, now seen corresponding path program 15 times [2022-03-01 17:47:14,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:14,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502799587] [2022-03-01 17:47:14,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:14,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:14,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:14,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502799587] [2022-03-01 17:47:14,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502799587] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:14,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324853985] [2022-03-01 17:47:14,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:47:14,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:14,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:14,668 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:14,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 17:47:14,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:47:14,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:14,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:14,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:14,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:14,906 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:47:14,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 58 [2022-03-01 17:47:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:15,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:15,190 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-01 17:47:15,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2022-03-01 17:47:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:15,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324853985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:15,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:15,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-03-01 17:47:15,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820984141] [2022-03-01 17:47:15,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:15,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:47:15,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:15,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:47:15,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:47:15,224 INFO L87 Difference]: Start difference. First operand 2611 states and 10794 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:16,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:16,541 INFO L93 Difference]: Finished difference Result 3670 states and 14922 transitions. [2022-03-01 17:47:16,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:47:16,541 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:16,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:16,550 INFO L225 Difference]: With dead ends: 3670 [2022-03-01 17:47:16,550 INFO L226 Difference]: Without dead ends: 3632 [2022-03-01 17:47:16,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=376, Invalid=2380, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:47:16,551 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 340 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:16,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 761 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1636 Invalid, 0 Unknown, 49 Unchecked, 0.7s Time] [2022-03-01 17:47:16,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2022-03-01 17:47:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 2646. [2022-03-01 17:47:16,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2645 states have (on average 4.141776937618148) internal successors, (10955), 2645 states have internal predecessors, (10955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 10955 transitions. [2022-03-01 17:47:16,617 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 10955 transitions. Word has length 23 [2022-03-01 17:47:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:16,617 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 10955 transitions. [2022-03-01 17:47:16,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 10955 transitions. [2022-03-01 17:47:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:16,623 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:16,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:16,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:16,839 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,SelfDestructingSolverStorable35 [2022-03-01 17:47:16,839 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:16,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:16,840 INFO L85 PathProgramCache]: Analyzing trace with hash 778537524, now seen corresponding path program 16 times [2022-03-01 17:47:16,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:16,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843195233] [2022-03-01 17:47:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:16,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:16,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:16,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843195233] [2022-03-01 17:47:16,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843195233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:16,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821369193] [2022-03-01 17:47:16,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:47:16,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:16,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:16,979 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:16,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 17:47:17,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:47:17,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:17,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:17,159 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 22 treesize of output 38 [2022-03-01 17:47:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:17,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:17,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:17,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:17,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:17,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:17,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821369193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:17,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:17,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:47:17,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197650262] [2022-03-01 17:47:17,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:17,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:47:17,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:17,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:47:17,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:47:17,659 INFO L87 Difference]: Start difference. First operand 2646 states and 10955 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:18,541 INFO L93 Difference]: Finished difference Result 3374 states and 13760 transitions. [2022-03-01 17:47:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:47:18,541 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:18,548 INFO L225 Difference]: With dead ends: 3374 [2022-03-01 17:47:18,548 INFO L226 Difference]: Without dead ends: 3344 [2022-03-01 17:47:18,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:47:18,549 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 208 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:18,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 673 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1618 Invalid, 0 Unknown, 103 Unchecked, 0.6s Time] [2022-03-01 17:47:18,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2022-03-01 17:47:18,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 2658. [2022-03-01 17:47:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2657 states have (on average 4.144523899134362) internal successors, (11012), 2657 states have internal predecessors, (11012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 11012 transitions. [2022-03-01 17:47:18,593 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 11012 transitions. Word has length 23 [2022-03-01 17:47:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:18,593 INFO L470 AbstractCegarLoop]: Abstraction has 2658 states and 11012 transitions. [2022-03-01 17:47:18,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 11012 transitions. [2022-03-01 17:47:18,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:18,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:18,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:18,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-01 17:47:18,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:18,802 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:18,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:18,803 INFO L85 PathProgramCache]: Analyzing trace with hash 859936580, now seen corresponding path program 17 times [2022-03-01 17:47:18,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:18,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564407579] [2022-03-01 17:47:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:18,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:18,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:18,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564407579] [2022-03-01 17:47:18,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564407579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:18,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109764884] [2022-03-01 17:47:18,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:47:18,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:18,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:18,952 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:18,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 17:47:18,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:47:18,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:18,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:18,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:19,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:19,130 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 21 treesize of output 37 [2022-03-01 17:47:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:19,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:19,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:19,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:19,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:19,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:19,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109764884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:19,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:19,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:47:19,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583348893] [2022-03-01 17:47:19,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:19,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:47:19,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:19,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:47:19,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:47:19,656 INFO L87 Difference]: Start difference. First operand 2658 states and 11012 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:20,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:20,609 INFO L93 Difference]: Finished difference Result 3371 states and 13742 transitions. [2022-03-01 17:47:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:47:20,610 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:20,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:20,618 INFO L225 Difference]: With dead ends: 3371 [2022-03-01 17:47:20,618 INFO L226 Difference]: Without dead ends: 3319 [2022-03-01 17:47:20,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:47:20,619 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 275 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:20,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 507 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1183 Invalid, 0 Unknown, 225 Unchecked, 0.5s Time] [2022-03-01 17:47:20,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2022-03-01 17:47:20,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 2662. [2022-03-01 17:47:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2661 states have (on average 4.145058248778654) internal successors, (11030), 2661 states have internal predecessors, (11030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 11030 transitions. [2022-03-01 17:47:20,666 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 11030 transitions. Word has length 23 [2022-03-01 17:47:20,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:20,666 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 11030 transitions. [2022-03-01 17:47:20,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 11030 transitions. [2022-03-01 17:47:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:20,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:20,671 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:20,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-01 17:47:20,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-01 17:47:20,871 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:20,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:20,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1821463982, now seen corresponding path program 18 times [2022-03-01 17:47:20,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:20,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106172388] [2022-03-01 17:47:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:20,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:21,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:21,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106172388] [2022-03-01 17:47:21,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106172388] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:21,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434397805] [2022-03-01 17:47:21,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:47:21,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:21,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:21,019 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:21,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:47:21,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:21,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 17:47:21,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:21,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:21,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:21,173 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 21 treesize of output 37 [2022-03-01 17:47:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:21,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:21,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:21,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:21,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:21,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:21,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434397805] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:21,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:21,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:47:21,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688773800] [2022-03-01 17:47:21,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:21,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:47:21,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:21,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:47:21,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:47:21,781 INFO L87 Difference]: Start difference. First operand 2662 states and 11030 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:22,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:22,535 INFO L93 Difference]: Finished difference Result 3324 states and 13572 transitions. [2022-03-01 17:47:22,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:47:22,535 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:22,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:22,542 INFO L225 Difference]: With dead ends: 3324 [2022-03-01 17:47:22,542 INFO L226 Difference]: Without dead ends: 3282 [2022-03-01 17:47:22,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:47:22,543 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 245 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:22,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 522 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 966 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-03-01 17:47:22,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2022-03-01 17:47:22,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 2662. [2022-03-01 17:47:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2661 states have (on average 4.145058248778654) internal successors, (11030), 2661 states have internal predecessors, (11030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:22,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 11030 transitions. [2022-03-01 17:47:22,583 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 11030 transitions. Word has length 23 [2022-03-01 17:47:22,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:22,583 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 11030 transitions. [2022-03-01 17:47:22,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:22,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 11030 transitions. [2022-03-01 17:47:22,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:22,588 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:22,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:22,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:22,793 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,SelfDestructingSolverStorable38 [2022-03-01 17:47:22,794 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:22,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:22,794 INFO L85 PathProgramCache]: Analyzing trace with hash -612794448, now seen corresponding path program 19 times [2022-03-01 17:47:22,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:22,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686980701] [2022-03-01 17:47:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:22,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:22,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:22,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686980701] [2022-03-01 17:47:22,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686980701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:22,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894544117] [2022-03-01 17:47:22,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:47:22,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:22,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:22,978 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:22,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 17:47:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:23,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:23,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:23,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:23,254 INFO L353 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2022-03-01 17:47:23,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 74 [2022-03-01 17:47:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:23,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:23,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:23,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:23,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 30 [2022-03-01 17:47:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:23,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894544117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:23,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:23,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-03-01 17:47:23,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947222847] [2022-03-01 17:47:23,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:23,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:47:23,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:23,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:47:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:47:23,855 INFO L87 Difference]: Start difference. First operand 2662 states and 11030 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:24,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:24,627 INFO L93 Difference]: Finished difference Result 3196 states and 13065 transitions. [2022-03-01 17:47:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:47:24,628 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:24,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:24,634 INFO L225 Difference]: With dead ends: 3196 [2022-03-01 17:47:24,634 INFO L226 Difference]: Without dead ends: 3145 [2022-03-01 17:47:24,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=315, Invalid=1941, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:47:24,635 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 216 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:24,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 709 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 391 Invalid, 0 Unknown, 274 Unchecked, 0.2s Time] [2022-03-01 17:47:24,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2022-03-01 17:47:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 2710. [2022-03-01 17:47:24,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 4.152823920265781) internal successors, (11250), 2709 states have internal predecessors, (11250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 11250 transitions. [2022-03-01 17:47:24,691 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 11250 transitions. Word has length 23 [2022-03-01 17:47:24,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:24,692 INFO L470 AbstractCegarLoop]: Abstraction has 2710 states and 11250 transitions. [2022-03-01 17:47:24,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 11250 transitions. [2022-03-01 17:47:24,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:24,696 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:24,697 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:24,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:24,897 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,SelfDestructingSolverStorable39 [2022-03-01 17:47:24,897 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:24,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1876090544, now seen corresponding path program 20 times [2022-03-01 17:47:24,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:24,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472769146] [2022-03-01 17:47:24,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:24,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:25,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:25,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472769146] [2022-03-01 17:47:25,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472769146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:25,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025357463] [2022-03-01 17:47:25,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:47:25,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:25,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:25,093 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:25,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 17:47:25,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:25,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:25,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:47:25,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:25,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:25,252 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 36 treesize of output 52 [2022-03-01 17:47:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:25,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:25,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:25,526 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 24 treesize of output 45 [2022-03-01 17:47:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:25,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025357463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:25,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:25,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-01 17:47:25,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753781866] [2022-03-01 17:47:25,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:25,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:47:25,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:25,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:47:25,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:47:25,579 INFO L87 Difference]: Start difference. First operand 2710 states and 11250 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:26,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:26,149 INFO L93 Difference]: Finished difference Result 3030 states and 12473 transitions. [2022-03-01 17:47:26,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:47:26,149 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:26,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:26,156 INFO L225 Difference]: With dead ends: 3030 [2022-03-01 17:47:26,156 INFO L226 Difference]: Without dead ends: 3011 [2022-03-01 17:47:26,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:47:26,156 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 217 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:26,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 364 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 654 Invalid, 0 Unknown, 532 Unchecked, 0.3s Time] [2022-03-01 17:47:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2022-03-01 17:47:26,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 2718. [2022-03-01 17:47:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2717 states have (on average 4.15311004784689) internal successors, (11284), 2717 states have internal predecessors, (11284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 11284 transitions. [2022-03-01 17:47:26,214 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 11284 transitions. Word has length 23 [2022-03-01 17:47:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:26,214 INFO L470 AbstractCegarLoop]: Abstraction has 2718 states and 11284 transitions. [2022-03-01 17:47:26,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 11284 transitions. [2022-03-01 17:47:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:26,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:26,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:26,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-01 17:47:26,419 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,SelfDestructingSolverStorable40 [2022-03-01 17:47:26,419 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:26,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1586106238, now seen corresponding path program 21 times [2022-03-01 17:47:26,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:26,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731505513] [2022-03-01 17:47:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:26,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:26,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:26,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731505513] [2022-03-01 17:47:26,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731505513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:26,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289700652] [2022-03-01 17:47:26,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:47:26,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:26,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:26,612 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:26,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 17:47:26,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:47:26,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:26,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:26,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:26,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:26,779 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 21 treesize of output 37 [2022-03-01 17:47:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:27,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:27,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:27,294 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 21 treesize of output 42 [2022-03-01 17:47:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:27,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289700652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:27,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:27,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-01 17:47:27,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140599698] [2022-03-01 17:47:27,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:27,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:47:27,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:47:27,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:47:27,370 INFO L87 Difference]: Start difference. First operand 2718 states and 11284 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:28,264 INFO L93 Difference]: Finished difference Result 3134 states and 12893 transitions. [2022-03-01 17:47:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:47:28,265 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:28,287 INFO L225 Difference]: With dead ends: 3134 [2022-03-01 17:47:28,287 INFO L226 Difference]: Without dead ends: 3113 [2022-03-01 17:47:28,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=330, Invalid=1392, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:47:28,288 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 215 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:28,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 679 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1326 Invalid, 0 Unknown, 393 Unchecked, 0.5s Time] [2022-03-01 17:47:28,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2022-03-01 17:47:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 2718. [2022-03-01 17:47:28,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2717 states have (on average 4.15311004784689) internal successors, (11284), 2717 states have internal predecessors, (11284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 11284 transitions. [2022-03-01 17:47:28,330 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 11284 transitions. Word has length 23 [2022-03-01 17:47:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:28,330 INFO L470 AbstractCegarLoop]: Abstraction has 2718 states and 11284 transitions. [2022-03-01 17:47:28,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:28,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 11284 transitions. [2022-03-01 17:47:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:28,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:28,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:28,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-01 17:47:28,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:28,537 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:28,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:28,537 INFO L85 PathProgramCache]: Analyzing trace with hash -263297070, now seen corresponding path program 22 times [2022-03-01 17:47:28,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:28,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409403844] [2022-03-01 17:47:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:28,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:28,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:28,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409403844] [2022-03-01 17:47:28,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409403844] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:28,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002346035] [2022-03-01 17:47:28,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:47:28,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:28,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:28,682 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:28,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 17:47:28,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:47:28,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:28,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:28,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:28,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:28,852 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 25 treesize of output 41 [2022-03-01 17:47:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:29,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:29,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:29,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:29,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:29,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:29,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002346035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:29,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:29,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:47:29,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434917897] [2022-03-01 17:47:29,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:29,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:47:29,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:29,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:47:29,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:47:29,315 INFO L87 Difference]: Start difference. First operand 2718 states and 11284 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:30,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:30,206 INFO L93 Difference]: Finished difference Result 3438 states and 14080 transitions. [2022-03-01 17:47:30,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:47:30,207 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:30,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:30,215 INFO L225 Difference]: With dead ends: 3438 [2022-03-01 17:47:30,215 INFO L226 Difference]: Without dead ends: 3408 [2022-03-01 17:47:30,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=1528, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:47:30,216 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 239 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:30,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 596 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1367 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2022-03-01 17:47:30,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2022-03-01 17:47:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 2722. [2022-03-01 17:47:30,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 4.1536199926497614) internal successors, (11302), 2721 states have internal predecessors, (11302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 11302 transitions. [2022-03-01 17:47:30,273 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 11302 transitions. Word has length 23 [2022-03-01 17:47:30,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:30,273 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 11302 transitions. [2022-03-01 17:47:30,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:30,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 11302 transitions. [2022-03-01 17:47:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:30,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:30,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:30,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:30,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:30,482 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:30,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:30,483 INFO L85 PathProgramCache]: Analyzing trace with hash -181898014, now seen corresponding path program 23 times [2022-03-01 17:47:30,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:30,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934664727] [2022-03-01 17:47:30,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:30,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:30,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:30,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934664727] [2022-03-01 17:47:30,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934664727] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:30,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395103694] [2022-03-01 17:47:30,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:47:30,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:30,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:30,628 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:30,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 17:47:30,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:47:30,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:30,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:30,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:30,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:30,783 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 25 treesize of output 41 [2022-03-01 17:47:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:31,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:31,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:31,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:31,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:31,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:31,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395103694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:31,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:31,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:47:31,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404199982] [2022-03-01 17:47:31,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:31,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:47:31,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:31,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:47:31,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:47:31,297 INFO L87 Difference]: Start difference. First operand 2722 states and 11302 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:32,400 INFO L93 Difference]: Finished difference Result 3265 states and 13408 transitions. [2022-03-01 17:47:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:47:32,400 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:32,407 INFO L225 Difference]: With dead ends: 3265 [2022-03-01 17:47:32,407 INFO L226 Difference]: Without dead ends: 3239 [2022-03-01 17:47:32,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:47:32,408 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 193 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:32,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 521 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1353 Invalid, 0 Unknown, 229 Unchecked, 0.5s Time] [2022-03-01 17:47:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2022-03-01 17:47:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 2722. [2022-03-01 17:47:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 4.1536199926497614) internal successors, (11302), 2721 states have internal predecessors, (11302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 11302 transitions. [2022-03-01 17:47:32,447 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 11302 transitions. Word has length 23 [2022-03-01 17:47:32,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:32,447 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 11302 transitions. [2022-03-01 17:47:32,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:32,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 11302 transitions. [2022-03-01 17:47:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:32,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:32,451 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:32,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-01 17:47:32,651 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,SelfDestructingSolverStorable43 [2022-03-01 17:47:32,652 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:32,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:32,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1431668720, now seen corresponding path program 24 times [2022-03-01 17:47:32,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:32,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930252003] [2022-03-01 17:47:32,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:32,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:32,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:32,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930252003] [2022-03-01 17:47:32,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930252003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:32,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397932676] [2022-03-01 17:47:32,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:47:32,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:32,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:32,784 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:32,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 17:47:32,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:47:32,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:32,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:32,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:32,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:32,940 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 21 treesize of output 37 [2022-03-01 17:47:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:33,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:33,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:33,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:33,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:33,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:33,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397932676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:33,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:33,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:47:33,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057066393] [2022-03-01 17:47:33,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:33,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:47:33,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:33,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:47:33,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:47:33,528 INFO L87 Difference]: Start difference. First operand 2722 states and 11302 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:34,347 INFO L93 Difference]: Finished difference Result 3255 states and 13372 transitions. [2022-03-01 17:47:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:47:34,347 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:34,355 INFO L225 Difference]: With dead ends: 3255 [2022-03-01 17:47:34,355 INFO L226 Difference]: Without dead ends: 3234 [2022-03-01 17:47:34,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:47:34,356 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 190 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:34,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 511 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1195 Invalid, 0 Unknown, 170 Unchecked, 0.5s Time] [2022-03-01 17:47:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2022-03-01 17:47:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2718. [2022-03-01 17:47:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2717 states have (on average 4.15311004784689) internal successors, (11284), 2717 states have internal predecessors, (11284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 11284 transitions. [2022-03-01 17:47:34,400 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 11284 transitions. Word has length 23 [2022-03-01 17:47:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:34,401 INFO L470 AbstractCegarLoop]: Abstraction has 2718 states and 11284 transitions. [2022-03-01 17:47:34,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:34,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 11284 transitions. [2022-03-01 17:47:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:34,405 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:34,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:34,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-01 17:47:34,605 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,SelfDestructingSolverStorable44 [2022-03-01 17:47:34,605 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:34,606 INFO L85 PathProgramCache]: Analyzing trace with hash -487844624, now seen corresponding path program 25 times [2022-03-01 17:47:34,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:34,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996208569] [2022-03-01 17:47:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:34,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:34,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:34,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996208569] [2022-03-01 17:47:34,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996208569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:34,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703819729] [2022-03-01 17:47:34,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:47:34,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:34,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:34,746 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:34,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 17:47:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:34,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:34,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:34,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:34,927 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 22 treesize of output 38 [2022-03-01 17:47:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:35,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:35,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:35,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:35,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:35,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:35,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703819729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:35,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:35,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:47:35,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969569336] [2022-03-01 17:47:35,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:35,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:47:35,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:35,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:47:35,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:47:35,430 INFO L87 Difference]: Start difference. First operand 2718 states and 11284 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:36,085 INFO L93 Difference]: Finished difference Result 3143 states and 12930 transitions. [2022-03-01 17:47:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:47:36,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:36,092 INFO L225 Difference]: With dead ends: 3143 [2022-03-01 17:47:36,092 INFO L226 Difference]: Without dead ends: 3109 [2022-03-01 17:47:36,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:47:36,093 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 133 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:36,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 469 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1168 Invalid, 0 Unknown, 147 Unchecked, 0.4s Time] [2022-03-01 17:47:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2022-03-01 17:47:36,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 2733. [2022-03-01 17:47:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2732 states have (on average 4.15190336749634) internal successors, (11343), 2732 states have internal predecessors, (11343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:36,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 11343 transitions. [2022-03-01 17:47:36,152 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 11343 transitions. Word has length 23 [2022-03-01 17:47:36,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:36,152 INFO L470 AbstractCegarLoop]: Abstraction has 2733 states and 11343 transitions. [2022-03-01 17:47:36,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:36,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 11343 transitions. [2022-03-01 17:47:36,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:36,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:36,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:36,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-01 17:47:36,364 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,SelfDestructingSolverStorable45 [2022-03-01 17:47:36,364 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:36,364 INFO L85 PathProgramCache]: Analyzing trace with hash -333407106, now seen corresponding path program 26 times [2022-03-01 17:47:36,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:36,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912797783] [2022-03-01 17:47:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:36,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:36,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:36,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912797783] [2022-03-01 17:47:36,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912797783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:36,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219944263] [2022-03-01 17:47:36,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:47:36,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:36,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:36,510 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:36,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 17:47:36,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:36,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:36,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:36,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:36,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:36,687 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 22 treesize of output 38 [2022-03-01 17:47:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:36,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:37,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:37,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:37,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:37,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:37,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219944263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:37,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:37,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:47:37,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278981854] [2022-03-01 17:47:37,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:37,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:47:37,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:37,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:47:37,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:47:37,177 INFO L87 Difference]: Start difference. First operand 2733 states and 11343 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:37,731 INFO L93 Difference]: Finished difference Result 3187 states and 13080 transitions. [2022-03-01 17:47:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:47:37,732 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:37,739 INFO L225 Difference]: With dead ends: 3187 [2022-03-01 17:47:37,739 INFO L226 Difference]: Without dead ends: 3157 [2022-03-01 17:47:37,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:47:37,740 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 130 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:37,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 473 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1033 Invalid, 0 Unknown, 170 Unchecked, 0.4s Time] [2022-03-01 17:47:37,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2022-03-01 17:47:37,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 2737. [2022-03-01 17:47:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 4.152412280701754) internal successors, (11361), 2736 states have internal predecessors, (11361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 11361 transitions. [2022-03-01 17:47:37,808 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 11361 transitions. Word has length 23 [2022-03-01 17:47:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:37,808 INFO L470 AbstractCegarLoop]: Abstraction has 2737 states and 11361 transitions. [2022-03-01 17:47:37,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:37,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 11361 transitions. [2022-03-01 17:47:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:37,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:37,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:37,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:38,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:38,014 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:38,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:38,014 INFO L85 PathProgramCache]: Analyzing trace with hash -252008050, now seen corresponding path program 27 times [2022-03-01 17:47:38,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:38,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059011896] [2022-03-01 17:47:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:38,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:38,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:38,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059011896] [2022-03-01 17:47:38,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059011896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:38,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070355573] [2022-03-01 17:47:38,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:47:38,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:38,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:38,160 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:38,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 17:47:38,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:47:38,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:38,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:38,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:38,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:38,342 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 25 treesize of output 41 [2022-03-01 17:47:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:38,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:38,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:38,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:38,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:38,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:38,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070355573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:38,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:38,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:47:38,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100659387] [2022-03-01 17:47:38,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:38,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:47:38,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:38,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:47:38,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:47:38,918 INFO L87 Difference]: Start difference. First operand 2737 states and 11361 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:39,883 INFO L93 Difference]: Finished difference Result 3190 states and 13110 transitions. [2022-03-01 17:47:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:47:39,883 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:39,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:39,892 INFO L225 Difference]: With dead ends: 3190 [2022-03-01 17:47:39,892 INFO L226 Difference]: Without dead ends: 3164 [2022-03-01 17:47:39,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=1730, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:47:39,893 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 190 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:39,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 404 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 932 Invalid, 0 Unknown, 192 Unchecked, 0.4s Time] [2022-03-01 17:47:39,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2022-03-01 17:47:39,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 2737. [2022-03-01 17:47:39,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 4.152412280701754) internal successors, (11361), 2736 states have internal predecessors, (11361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:39,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 11361 transitions. [2022-03-01 17:47:39,954 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 11361 transitions. Word has length 23 [2022-03-01 17:47:39,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:39,954 INFO L470 AbstractCegarLoop]: Abstraction has 2737 states and 11361 transitions. [2022-03-01 17:47:39,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 11361 transitions. [2022-03-01 17:47:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:39,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:39,959 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:39,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-01 17:47:40,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-01 17:47:40,160 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:40,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1361558684, now seen corresponding path program 28 times [2022-03-01 17:47:40,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:40,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783506424] [2022-03-01 17:47:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:40,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:40,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:40,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783506424] [2022-03-01 17:47:40,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783506424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:40,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32370532] [2022-03-01 17:47:40,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:47:40,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:40,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:40,313 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:40,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 17:47:40,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:47:40,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:40,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:40,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:40,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:40,497 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 25 treesize of output 41 [2022-03-01 17:47:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:40,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:41,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:41,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:41,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:41,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:41,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32370532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:41,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:41,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:47:41,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494252984] [2022-03-01 17:47:41,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:41,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:47:41,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:41,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:47:41,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:47:41,068 INFO L87 Difference]: Start difference. First operand 2737 states and 11361 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:41,907 INFO L93 Difference]: Finished difference Result 3206 states and 13174 transitions. [2022-03-01 17:47:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:47:41,908 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:41,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:41,915 INFO L225 Difference]: With dead ends: 3206 [2022-03-01 17:47:41,916 INFO L226 Difference]: Without dead ends: 3185 [2022-03-01 17:47:41,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=1306, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:47:41,916 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 156 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:41,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 482 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1172 Invalid, 0 Unknown, 116 Unchecked, 0.4s Time] [2022-03-01 17:47:41,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3185 states. [2022-03-01 17:47:41,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 2733. [2022-03-01 17:47:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2732 states have (on average 4.15190336749634) internal successors, (11343), 2732 states have internal predecessors, (11343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 11343 transitions. [2022-03-01 17:47:41,988 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 11343 transitions. Word has length 23 [2022-03-01 17:47:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:41,988 INFO L470 AbstractCegarLoop]: Abstraction has 2733 states and 11343 transitions. [2022-03-01 17:47:41,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 11343 transitions. [2022-03-01 17:47:41,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:41,993 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:41,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:42,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:42,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-01 17:47:42,211 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:42,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1772772286, now seen corresponding path program 29 times [2022-03-01 17:47:42,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:42,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813776004] [2022-03-01 17:47:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:42,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:42,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:42,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813776004] [2022-03-01 17:47:42,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813776004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:42,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518133846] [2022-03-01 17:47:42,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:47:42,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:42,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:42,381 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:42,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 17:47:42,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:47:42,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:42,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:42,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:42,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:42,560 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 24 treesize of output 40 [2022-03-01 17:47:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:42,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:43,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:43,030 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 21 treesize of output 42 [2022-03-01 17:47:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:43,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518133846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:43,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:43,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-01 17:47:43,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222496387] [2022-03-01 17:47:43,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:43,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:47:43,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:43,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:47:43,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:47:43,088 INFO L87 Difference]: Start difference. First operand 2733 states and 11343 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:43,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:43,622 INFO L93 Difference]: Finished difference Result 3016 states and 12415 transitions. [2022-03-01 17:47:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:47:43,622 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:43,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:43,629 INFO L225 Difference]: With dead ends: 3016 [2022-03-01 17:47:43,630 INFO L226 Difference]: Without dead ends: 2994 [2022-03-01 17:47:43,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:47:43,630 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 154 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:43,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 587 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 794 Invalid, 0 Unknown, 328 Unchecked, 0.3s Time] [2022-03-01 17:47:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2022-03-01 17:47:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2737. [2022-03-01 17:47:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 4.152412280701754) internal successors, (11361), 2736 states have internal predecessors, (11361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 11361 transitions. [2022-03-01 17:47:43,675 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 11361 transitions. Word has length 23 [2022-03-01 17:47:43,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:43,675 INFO L470 AbstractCegarLoop]: Abstraction has 2737 states and 11361 transitions. [2022-03-01 17:47:43,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 11361 transitions. [2022-03-01 17:47:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:43,680 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:43,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:43,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-01 17:47:43,881 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,SelfDestructingSolverStorable49 [2022-03-01 17:47:43,881 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:43,881 INFO L85 PathProgramCache]: Analyzing trace with hash -323294324, now seen corresponding path program 30 times [2022-03-01 17:47:43,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:43,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290094902] [2022-03-01 17:47:43,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:43,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:44,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:44,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290094902] [2022-03-01 17:47:44,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290094902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:44,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981305465] [2022-03-01 17:47:44,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:47:44,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:44,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:44,072 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:44,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 17:47:44,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:47:44,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:44,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:44,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:44,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:44,229 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 21 treesize of output 37 [2022-03-01 17:47:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:44,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:44,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:44,743 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 21 treesize of output 42 [2022-03-01 17:47:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:44,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981305465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:44,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:44,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-01 17:47:44,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916791593] [2022-03-01 17:47:44,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:44,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:47:44,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:44,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:47:44,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:47:44,808 INFO L87 Difference]: Start difference. First operand 2737 states and 11361 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:45,559 INFO L93 Difference]: Finished difference Result 3074 states and 12656 transitions. [2022-03-01 17:47:45,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:47:45,559 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:45,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:45,566 INFO L225 Difference]: With dead ends: 3074 [2022-03-01 17:47:45,566 INFO L226 Difference]: Without dead ends: 3053 [2022-03-01 17:47:45,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=1395, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:47:45,566 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 228 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:45,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 558 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 895 Invalid, 0 Unknown, 414 Unchecked, 0.4s Time] [2022-03-01 17:47:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3053 states. [2022-03-01 17:47:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3053 to 2733. [2022-03-01 17:47:45,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2732 states have (on average 4.15190336749634) internal successors, (11343), 2732 states have internal predecessors, (11343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 11343 transitions. [2022-03-01 17:47:45,607 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 11343 transitions. Word has length 23 [2022-03-01 17:47:45,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:45,608 INFO L470 AbstractCegarLoop]: Abstraction has 2733 states and 11343 transitions. [2022-03-01 17:47:45,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 11343 transitions. [2022-03-01 17:47:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:45,627 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:45,627 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:45,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-01 17:47:45,843 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,SelfDestructingSolverStorable50 [2022-03-01 17:47:45,843 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:45,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:45,844 INFO L85 PathProgramCache]: Analyzing trace with hash 2122269664, now seen corresponding path program 31 times [2022-03-01 17:47:45,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:45,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29961157] [2022-03-01 17:47:45,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:45,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:45,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:45,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29961157] [2022-03-01 17:47:45,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29961157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:45,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779001774] [2022-03-01 17:47:45,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:47:45,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:45,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:45,962 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:45,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 17:47:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:45,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:45,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:46,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:46,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-03-01 17:47:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:46,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:46,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:46,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:47:46,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:46,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:47:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:46,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779001774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:46,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:46,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:47:46,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434490888] [2022-03-01 17:47:46,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:46,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:47:46,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:46,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:47:46,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:47:46,588 INFO L87 Difference]: Start difference. First operand 2733 states and 11343 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:47,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:47,444 INFO L93 Difference]: Finished difference Result 3441 states and 14094 transitions. [2022-03-01 17:47:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:47:47,444 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:47,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:47,452 INFO L225 Difference]: With dead ends: 3441 [2022-03-01 17:47:47,452 INFO L226 Difference]: Without dead ends: 3411 [2022-03-01 17:47:47,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:47:47,453 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 235 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:47,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 521 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1181 Invalid, 0 Unknown, 121 Unchecked, 0.5s Time] [2022-03-01 17:47:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2022-03-01 17:47:47,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2725. [2022-03-01 17:47:47,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 4.1501468428781205) internal successors, (11305), 2724 states have internal predecessors, (11305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 11305 transitions. [2022-03-01 17:47:47,497 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 11305 transitions. Word has length 23 [2022-03-01 17:47:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:47,497 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 11305 transitions. [2022-03-01 17:47:47,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 11305 transitions. [2022-03-01 17:47:47,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:47,501 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:47,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:47,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:47,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:47,709 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:47,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1607113522, now seen corresponding path program 32 times [2022-03-01 17:47:47,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:47,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116141927] [2022-03-01 17:47:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:47,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:47,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:47,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116141927] [2022-03-01 17:47:47,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116141927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:47,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110385392] [2022-03-01 17:47:47,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:47:47,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:47,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:47,899 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:47,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 17:47:47,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:47,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:47,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:47,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:48,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:48,080 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 24 treesize of output 40 [2022-03-01 17:47:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:48,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:48,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:48,826 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 21 treesize of output 42 [2022-03-01 17:47:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:48,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110385392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:48,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:48,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-01 17:47:48,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413629265] [2022-03-01 17:47:48,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:48,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:47:48,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:48,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:47:48,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:47:48,915 INFO L87 Difference]: Start difference. First operand 2725 states and 11305 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:49,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:49,513 INFO L93 Difference]: Finished difference Result 3091 states and 12721 transitions. [2022-03-01 17:47:49,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:47:49,514 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:49,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:49,520 INFO L225 Difference]: With dead ends: 3091 [2022-03-01 17:47:49,521 INFO L226 Difference]: Without dead ends: 3069 [2022-03-01 17:47:49,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:47:49,521 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 135 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:49,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 572 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1095 Invalid, 0 Unknown, 208 Unchecked, 0.4s Time] [2022-03-01 17:47:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2022-03-01 17:47:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 2725. [2022-03-01 17:47:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 4.1501468428781205) internal successors, (11305), 2724 states have internal predecessors, (11305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:49,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 11305 transitions. [2022-03-01 17:47:49,566 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 11305 transitions. Word has length 23 [2022-03-01 17:47:49,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:49,566 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 11305 transitions. [2022-03-01 17:47:49,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:49,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 11305 transitions. [2022-03-01 17:47:49,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:49,570 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:49,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:49,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:49,779 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,SelfDestructingSolverStorable52 [2022-03-01 17:47:49,779 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:49,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:49,780 INFO L85 PathProgramCache]: Analyzing trace with hash 591787164, now seen corresponding path program 33 times [2022-03-01 17:47:49,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:49,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388802243] [2022-03-01 17:47:49,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:49,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:49,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:49,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388802243] [2022-03-01 17:47:49,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388802243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:49,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715686521] [2022-03-01 17:47:49,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:47:49,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:49,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:49,955 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:49,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 17:47:49,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:47:49,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:49,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:49,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:50,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:50,134 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 25 treesize of output 41 [2022-03-01 17:47:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:50,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:50,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:50,644 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 21 treesize of output 42 [2022-03-01 17:47:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:50,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715686521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:50,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:50,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-01 17:47:50,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10202361] [2022-03-01 17:47:50,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:50,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:47:50,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:50,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:47:50,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:47:50,758 INFO L87 Difference]: Start difference. First operand 2725 states and 11305 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:51,559 INFO L93 Difference]: Finished difference Result 3077 states and 12670 transitions. [2022-03-01 17:47:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:47:51,560 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:51,566 INFO L225 Difference]: With dead ends: 3077 [2022-03-01 17:47:51,566 INFO L226 Difference]: Without dead ends: 3056 [2022-03-01 17:47:51,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:47:51,567 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 186 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:51,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 495 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1079 Invalid, 0 Unknown, 269 Unchecked, 0.4s Time] [2022-03-01 17:47:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2022-03-01 17:47:51,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2717. [2022-03-01 17:47:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2717 states, 2716 states have (on average 4.149852724594993) internal successors, (11271), 2716 states have internal predecessors, (11271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2717 states to 2717 states and 11271 transitions. [2022-03-01 17:47:51,605 INFO L78 Accepts]: Start accepts. Automaton has 2717 states and 11271 transitions. Word has length 23 [2022-03-01 17:47:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:51,605 INFO L470 AbstractCegarLoop]: Abstraction has 2717 states and 11271 transitions. [2022-03-01 17:47:51,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2717 states and 11271 transitions. [2022-03-01 17:47:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:51,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:51,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:51,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-01 17:47:51,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:51,812 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:51,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1452676004, now seen corresponding path program 34 times [2022-03-01 17:47:51,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:51,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772432796] [2022-03-01 17:47:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:51,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:52,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:52,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772432796] [2022-03-01 17:47:52,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772432796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:52,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517558245] [2022-03-01 17:47:52,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:47:52,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:52,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:52,012 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:52,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 17:47:52,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:47:52,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:52,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:52,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:52,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:52,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:52,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:52,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2022-03-01 17:47:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:52,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:52,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:52,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:52,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 30 [2022-03-01 17:47:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:52,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517558245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:52,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:52,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-03-01 17:47:52,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723461283] [2022-03-01 17:47:52,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:52,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:47:52,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:52,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:47:52,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:47:52,878 INFO L87 Difference]: Start difference. First operand 2717 states and 11271 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:54,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:54,605 INFO L93 Difference]: Finished difference Result 3876 states and 15787 transitions. [2022-03-01 17:47:54,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:47:54,605 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:54,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:54,613 INFO L225 Difference]: With dead ends: 3876 [2022-03-01 17:47:54,613 INFO L226 Difference]: Without dead ends: 3828 [2022-03-01 17:47:54,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=550, Invalid=3232, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 17:47:54,614 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 358 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 477 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:54,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 829 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1274 Invalid, 0 Unknown, 477 Unchecked, 0.6s Time] [2022-03-01 17:47:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3828 states. [2022-03-01 17:47:54,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3828 to 2753. [2022-03-01 17:47:54,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 4.155523255813954) internal successors, (11436), 2752 states have internal predecessors, (11436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 11436 transitions. [2022-03-01 17:47:54,657 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 11436 transitions. Word has length 23 [2022-03-01 17:47:54,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:54,657 INFO L470 AbstractCegarLoop]: Abstraction has 2753 states and 11436 transitions. [2022-03-01 17:47:54,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:54,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 11436 transitions. [2022-03-01 17:47:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:54,661 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:54,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:54,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-01 17:47:54,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:54,862 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:54,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:54,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1445095954, now seen corresponding path program 35 times [2022-03-01 17:47:54,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:54,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833393535] [2022-03-01 17:47:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:54,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:55,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:55,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833393535] [2022-03-01 17:47:55,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833393535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:55,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981135004] [2022-03-01 17:47:55,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:47:55,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:55,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:55,037 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:55,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 17:47:55,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:47:55,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:55,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:55,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:55,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:55,220 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 24 treesize of output 40 [2022-03-01 17:47:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:55,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:55,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:55,881 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 21 treesize of output 42 [2022-03-01 17:47:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:55,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981135004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:55,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:55,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-01 17:47:55,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738948863] [2022-03-01 17:47:55,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:55,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:47:55,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:55,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:47:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=648, Unknown=1, NotChecked=0, Total=756 [2022-03-01 17:47:55,958 INFO L87 Difference]: Start difference. First operand 2753 states and 11436 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:56,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:56,835 INFO L93 Difference]: Finished difference Result 3579 states and 14659 transitions. [2022-03-01 17:47:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:47:56,835 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:47:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:56,843 INFO L225 Difference]: With dead ends: 3579 [2022-03-01 17:47:56,843 INFO L226 Difference]: Without dead ends: 3557 [2022-03-01 17:47:56,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=1390, Unknown=1, NotChecked=0, Total=1640 [2022-03-01 17:47:56,844 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 303 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:56,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 778 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1289 Invalid, 0 Unknown, 408 Unchecked, 0.5s Time] [2022-03-01 17:47:56,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2022-03-01 17:47:56,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2753. [2022-03-01 17:47:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 4.155523255813954) internal successors, (11436), 2752 states have internal predecessors, (11436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 11436 transitions. [2022-03-01 17:47:56,885 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 11436 transitions. Word has length 23 [2022-03-01 17:47:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:56,885 INFO L470 AbstractCegarLoop]: Abstraction has 2753 states and 11436 transitions. [2022-03-01 17:47:56,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 11436 transitions. [2022-03-01 17:47:56,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:56,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:56,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:56,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-01 17:47:57,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:57,091 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:57,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:57,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2030429906, now seen corresponding path program 36 times [2022-03-01 17:47:57,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:57,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817328644] [2022-03-01 17:47:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:57,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:57,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:57,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817328644] [2022-03-01 17:47:57,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817328644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:57,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394074978] [2022-03-01 17:47:57,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:47:57,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:57,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:57,283 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:57,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 17:47:57,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:47:57,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:57,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 17:47:57,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:57,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:57,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:47:57,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-03-01 17:47:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:57,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:57,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:57,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:47:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:47:57,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394074978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:57,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:57,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 24 [2022-03-01 17:47:57,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426812361] [2022-03-01 17:47:57,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:57,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:47:57,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:57,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:47:57,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:47:57,713 INFO L87 Difference]: Start difference. First operand 2753 states and 11436 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-03-01 17:47:59,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:59,301 INFO L93 Difference]: Finished difference Result 4582 states and 18594 transitions. [2022-03-01 17:47:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-01 17:47:59,301 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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 23 [2022-03-01 17:47:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:59,311 INFO L225 Difference]: With dead ends: 4582 [2022-03-01 17:47:59,311 INFO L226 Difference]: Without dead ends: 4522 [2022-03-01 17:47:59,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=679, Invalid=2627, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 17:47:59,312 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 443 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:59,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 522 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1154 Invalid, 0 Unknown, 194 Unchecked, 0.5s Time] [2022-03-01 17:47:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4522 states. [2022-03-01 17:47:59,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4522 to 2872. [2022-03-01 17:47:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 4.176593521421108) internal successors, (11991), 2871 states have internal predecessors, (11991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 11991 transitions. [2022-03-01 17:47:59,364 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 11991 transitions. Word has length 23 [2022-03-01 17:47:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:59,364 INFO L470 AbstractCegarLoop]: Abstraction has 2872 states and 11991 transitions. [2022-03-01 17:47:59,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-03-01 17:47:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 11991 transitions. [2022-03-01 17:47:59,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:47:59,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:59,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:47:59,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-01 17:47:59,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:59,583 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:47:59,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:59,584 INFO L85 PathProgramCache]: Analyzing trace with hash -650970656, now seen corresponding path program 37 times [2022-03-01 17:47:59,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:59,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191855196] [2022-03-01 17:47:59,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:59,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:59,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:59,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191855196] [2022-03-01 17:47:59,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191855196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:59,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858468958] [2022-03-01 17:47:59,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:47:59,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:59,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:59,767 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:47:59,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 17:47:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:59,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:47:59,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:59,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:59,928 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 25 treesize of output 41 [2022-03-01 17:48:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:00,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:00,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:00,474 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 21 treesize of output 42 [2022-03-01 17:48:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:00,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858468958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:00,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:00,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-01 17:48:00,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544389351] [2022-03-01 17:48:00,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:00,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:48:00,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:00,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:48:00,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:48:00,551 INFO L87 Difference]: Start difference. First operand 2872 states and 11991 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:01,735 INFO L93 Difference]: Finished difference Result 3496 states and 14414 transitions. [2022-03-01 17:48:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:48:01,735 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:01,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:01,744 INFO L225 Difference]: With dead ends: 3496 [2022-03-01 17:48:01,744 INFO L226 Difference]: Without dead ends: 3475 [2022-03-01 17:48:01,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=328, Invalid=1564, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:48:01,744 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 281 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 869 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:01,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 619 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1093 Invalid, 0 Unknown, 869 Unchecked, 0.4s Time] [2022-03-01 17:48:01,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2022-03-01 17:48:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 2872. [2022-03-01 17:48:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 4.176593521421108) internal successors, (11991), 2871 states have internal predecessors, (11991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 11991 transitions. [2022-03-01 17:48:01,791 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 11991 transitions. Word has length 23 [2022-03-01 17:48:01,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:01,792 INFO L470 AbstractCegarLoop]: Abstraction has 2872 states and 11991 transitions. [2022-03-01 17:48:01,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:01,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 11991 transitions. [2022-03-01 17:48:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:01,796 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:01,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:01,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:01,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-01 17:48:01,997 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:01,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:01,997 INFO L85 PathProgramCache]: Analyzing trace with hash -805408174, now seen corresponding path program 38 times [2022-03-01 17:48:01,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:01,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182853977] [2022-03-01 17:48:01,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:01,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:02,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:02,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182853977] [2022-03-01 17:48:02,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182853977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:02,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603418055] [2022-03-01 17:48:02,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:02,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:02,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:02,129 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:02,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 17:48:02,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:02,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:02,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:02,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:02,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:02,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-03-01 17:48:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:02,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:02,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:02,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:02,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:02,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:02,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603418055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:02,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:02,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:48:02,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827284316] [2022-03-01 17:48:02,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:02,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:48:02,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:02,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:48:02,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:48:02,925 INFO L87 Difference]: Start difference. First operand 2872 states and 11991 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:03,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:03,848 INFO L93 Difference]: Finished difference Result 3767 states and 15459 transitions. [2022-03-01 17:48:03,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:48:03,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:03,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:03,856 INFO L225 Difference]: With dead ends: 3767 [2022-03-01 17:48:03,856 INFO L226 Difference]: Without dead ends: 3725 [2022-03-01 17:48:03,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:48:03,857 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 283 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:03,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 543 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1256 Invalid, 0 Unknown, 222 Unchecked, 0.5s Time] [2022-03-01 17:48:03,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2022-03-01 17:48:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 2888. [2022-03-01 17:48:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2888 states, 2887 states have (on average 4.1783858676827155) internal successors, (12063), 2887 states have internal predecessors, (12063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:03,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 12063 transitions. [2022-03-01 17:48:03,902 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 12063 transitions. Word has length 23 [2022-03-01 17:48:03,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:03,902 INFO L470 AbstractCegarLoop]: Abstraction has 2888 states and 12063 transitions. [2022-03-01 17:48:03,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:03,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 12063 transitions. [2022-03-01 17:48:03,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:03,907 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:03,907 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:03,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-01 17:48:04,108 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,SelfDestructingSolverStorable58 [2022-03-01 17:48:04,108 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:04,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:04,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1570045778, now seen corresponding path program 39 times [2022-03-01 17:48:04,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:04,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215940244] [2022-03-01 17:48:04,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:04,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:04,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:04,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215940244] [2022-03-01 17:48:04,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215940244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:04,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318056564] [2022-03-01 17:48:04,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:04,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:04,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:04,233 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:04,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 17:48:04,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:48:04,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:04,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:04,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:04,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:04,407 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 22 treesize of output 38 [2022-03-01 17:48:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:04,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:05,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:05,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:05,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:05,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:05,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318056564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:05,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:05,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:48:05,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856094792] [2022-03-01 17:48:05,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:05,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:48:05,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:05,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:48:05,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=514, Unknown=1, NotChecked=0, Total=600 [2022-03-01 17:48:05,114 INFO L87 Difference]: Start difference. First operand 2888 states and 12063 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:05,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:05,915 INFO L93 Difference]: Finished difference Result 3418 states and 14110 transitions. [2022-03-01 17:48:05,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:48:05,915 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:05,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:05,922 INFO L225 Difference]: With dead ends: 3418 [2022-03-01 17:48:05,922 INFO L226 Difference]: Without dead ends: 3384 [2022-03-01 17:48:05,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=1087, Unknown=1, NotChecked=0, Total=1260 [2022-03-01 17:48:05,923 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 228 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:05,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 549 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1351 Invalid, 0 Unknown, 153 Unchecked, 0.5s Time] [2022-03-01 17:48:05,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2022-03-01 17:48:05,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 2900. [2022-03-01 17:48:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 4.178682304242843) internal successors, (12114), 2899 states have internal predecessors, (12114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 12114 transitions. [2022-03-01 17:48:05,968 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 12114 transitions. Word has length 23 [2022-03-01 17:48:05,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:05,968 INFO L470 AbstractCegarLoop]: Abstraction has 2900 states and 12114 transitions. [2022-03-01 17:48:05,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:05,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 12114 transitions. [2022-03-01 17:48:05,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:05,973 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:05,973 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:05,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:06,189 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,SelfDestructingSolverStorable59 [2022-03-01 17:48:06,189 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:06,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1724483296, now seen corresponding path program 40 times [2022-03-01 17:48:06,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:06,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261194635] [2022-03-01 17:48:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:06,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:06,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:06,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261194635] [2022-03-01 17:48:06,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261194635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:06,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410673717] [2022-03-01 17:48:06,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:06,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:06,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:06,328 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:06,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 17:48:06,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:06,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:06,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:06,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:06,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:06,498 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 22 treesize of output 38 [2022-03-01 17:48:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:06,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:06,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:06,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:06,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:06,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:07,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410673717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:07,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:07,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:48:07,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296042068] [2022-03-01 17:48:07,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:07,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:48:07,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:48:07,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:48:07,006 INFO L87 Difference]: Start difference. First operand 2900 states and 12114 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:07,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:07,726 INFO L93 Difference]: Finished difference Result 3395 states and 14015 transitions. [2022-03-01 17:48:07,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:48:07,726 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:07,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:07,734 INFO L225 Difference]: With dead ends: 3395 [2022-03-01 17:48:07,734 INFO L226 Difference]: Without dead ends: 3365 [2022-03-01 17:48:07,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:48:07,735 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 232 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:07,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 501 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1251 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2022-03-01 17:48:07,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2022-03-01 17:48:07,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 2904. [2022-03-01 17:48:07,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 4.179125043058905) internal successors, (12132), 2903 states have internal predecessors, (12132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 12132 transitions. [2022-03-01 17:48:07,784 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 12132 transitions. Word has length 23 [2022-03-01 17:48:07,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:07,785 INFO L470 AbstractCegarLoop]: Abstraction has 2904 states and 12132 transitions. [2022-03-01 17:48:07,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 12132 transitions. [2022-03-01 17:48:07,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:07,790 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:07,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:07,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:08,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:08,008 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:08,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1805882352, now seen corresponding path program 41 times [2022-03-01 17:48:08,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:08,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479844707] [2022-03-01 17:48:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:08,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:08,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:08,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479844707] [2022-03-01 17:48:08,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479844707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:08,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273755521] [2022-03-01 17:48:08,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:48:08,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:08,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:08,142 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:08,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 17:48:08,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:48:08,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:08,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:08,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:08,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:08,329 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 21 treesize of output 37 [2022-03-01 17:48:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:08,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:08,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:08,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:08,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:08,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:08,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273755521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:08,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:08,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:48:08,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643346134] [2022-03-01 17:48:08,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:08,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:48:08,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:08,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:48:08,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:08,884 INFO L87 Difference]: Start difference. First operand 2904 states and 12132 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:09,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:09,694 INFO L93 Difference]: Finished difference Result 3554 states and 14620 transitions. [2022-03-01 17:48:09,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:48:09,694 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:09,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:09,702 INFO L225 Difference]: With dead ends: 3554 [2022-03-01 17:48:09,703 INFO L226 Difference]: Without dead ends: 3502 [2022-03-01 17:48:09,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=1393, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:48:09,703 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 322 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:09,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 440 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1074 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2022-03-01 17:48:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2022-03-01 17:48:09,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 2916. [2022-03-01 17:48:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 4.179073756432247) internal successors, (12182), 2915 states have internal predecessors, (12182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 12182 transitions. [2022-03-01 17:48:09,750 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 12182 transitions. Word has length 23 [2022-03-01 17:48:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:09,750 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 12182 transitions. [2022-03-01 17:48:09,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:09,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 12182 transitions. [2022-03-01 17:48:09,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:09,756 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:09,756 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:09,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:09,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:09,956 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:09,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:09,956 INFO L85 PathProgramCache]: Analyzing trace with hash -875518210, now seen corresponding path program 42 times [2022-03-01 17:48:09,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:09,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185651255] [2022-03-01 17:48:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:09,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:10,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:10,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185651255] [2022-03-01 17:48:10,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185651255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:10,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454973856] [2022-03-01 17:48:10,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:10,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:10,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:10,094 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:10,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 17:48:10,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:48:10,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:10,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:48:10,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:10,277 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-03-01 17:48:10,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 47 [2022-03-01 17:48:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:10,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:10,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454973856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:10,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:10,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-03-01 17:48:10,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424691367] [2022-03-01 17:48:10,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:10,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:48:10,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:10,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:48:10,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:10,619 INFO L87 Difference]: Start difference. First operand 2916 states and 12182 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 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) [2022-03-01 17:48:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:12,754 INFO L93 Difference]: Finished difference Result 4303 states and 17540 transitions. [2022-03-01 17:48:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 17:48:12,754 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 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 23 [2022-03-01 17:48:12,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:12,764 INFO L225 Difference]: With dead ends: 4303 [2022-03-01 17:48:12,764 INFO L226 Difference]: Without dead ends: 4250 [2022-03-01 17:48:12,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=521, Invalid=3261, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 17:48:12,765 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 442 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:12,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 777 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 17:48:12,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4250 states. [2022-03-01 17:48:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4250 to 2908. [2022-03-01 17:48:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2907 states have (on average 4.180598555211558) internal successors, (12153), 2907 states have internal predecessors, (12153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 12153 transitions. [2022-03-01 17:48:12,833 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 12153 transitions. Word has length 23 [2022-03-01 17:48:12,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:12,833 INFO L470 AbstractCegarLoop]: Abstraction has 2908 states and 12153 transitions. [2022-03-01 17:48:12,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 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) [2022-03-01 17:48:12,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 12153 transitions. [2022-03-01 17:48:12,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:12,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:12,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:12,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-01 17:48:13,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:13,049 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:13,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:13,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1730602444, now seen corresponding path program 43 times [2022-03-01 17:48:13,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:13,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381042597] [2022-03-01 17:48:13,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:13,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:13,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:13,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381042597] [2022-03-01 17:48:13,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381042597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:13,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101578925] [2022-03-01 17:48:13,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:48:13,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:13,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:13,173 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:13,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 17:48:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:13,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:13,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:13,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:13,360 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 20 treesize of output 36 [2022-03-01 17:48:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:13,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:13,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:13,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:13,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:13,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:13,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101578925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:13,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:13,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:48:13,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685935750] [2022-03-01 17:48:13,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:13,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:48:13,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:13,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:48:13,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:48:13,857 INFO L87 Difference]: Start difference. First operand 2908 states and 12153 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:14,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:14,444 INFO L93 Difference]: Finished difference Result 3351 states and 13838 transitions. [2022-03-01 17:48:14,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:48:14,444 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:14,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:14,452 INFO L225 Difference]: With dead ends: 3351 [2022-03-01 17:48:14,452 INFO L226 Difference]: Without dead ends: 3342 [2022-03-01 17:48:14,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:48:14,452 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 199 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:14,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 443 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1022 Invalid, 0 Unknown, 97 Unchecked, 0.4s Time] [2022-03-01 17:48:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2022-03-01 17:48:14,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 2987. [2022-03-01 17:48:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2987 states, 2986 states have (on average 4.183523107836571) internal successors, (12492), 2986 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2987 states to 2987 states and 12492 transitions. [2022-03-01 17:48:14,499 INFO L78 Accepts]: Start accepts. Automaton has 2987 states and 12492 transitions. Word has length 23 [2022-03-01 17:48:14,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:14,499 INFO L470 AbstractCegarLoop]: Abstraction has 2987 states and 12492 transitions. [2022-03-01 17:48:14,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:14,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2987 states and 12492 transitions. [2022-03-01 17:48:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:14,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:14,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:14,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-01 17:48:14,704 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,SelfDestructingSolverStorable63 [2022-03-01 17:48:14,704 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash -815520956, now seen corresponding path program 44 times [2022-03-01 17:48:14,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:14,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531428225] [2022-03-01 17:48:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:14,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:14,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:14,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531428225] [2022-03-01 17:48:14,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531428225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:14,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272434571] [2022-03-01 17:48:14,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:14,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:14,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:14,833 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:14,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 17:48:14,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:14,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:14,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:48:14,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:15,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:15,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-03-01 17:48:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:15,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:15,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:15,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:15,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:15,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:15,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272434571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:15,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:15,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:48:15,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104655172] [2022-03-01 17:48:15,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:15,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:48:15,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:15,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:48:15,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:15,451 INFO L87 Difference]: Start difference. First operand 2987 states and 12492 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:16,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:16,984 INFO L93 Difference]: Finished difference Result 4623 states and 18876 transitions. [2022-03-01 17:48:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 17:48:16,984 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:16,995 INFO L225 Difference]: With dead ends: 4623 [2022-03-01 17:48:16,995 INFO L226 Difference]: Without dead ends: 4580 [2022-03-01 17:48:16,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:48:16,996 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 379 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:16,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 771 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1559 Invalid, 0 Unknown, 131 Unchecked, 0.7s Time] [2022-03-01 17:48:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4580 states. [2022-03-01 17:48:17,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4580 to 3050. [2022-03-01 17:48:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3050 states, 3049 states have (on average 4.191866185634634) internal successors, (12781), 3049 states have internal predecessors, (12781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:17,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 12781 transitions. [2022-03-01 17:48:17,057 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 12781 transitions. Word has length 23 [2022-03-01 17:48:17,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:17,057 INFO L470 AbstractCegarLoop]: Abstraction has 3050 states and 12781 transitions. [2022-03-01 17:48:17,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:17,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 12781 transitions. [2022-03-01 17:48:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:17,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:17,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:17,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:17,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:17,263 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:17,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:17,264 INFO L85 PathProgramCache]: Analyzing trace with hash -661083438, now seen corresponding path program 45 times [2022-03-01 17:48:17,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:17,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292508974] [2022-03-01 17:48:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:17,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:17,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:17,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292508974] [2022-03-01 17:48:17,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292508974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:17,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71379145] [2022-03-01 17:48:17,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:17,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:17,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:17,385 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:17,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 17:48:17,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:48:17,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:17,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:17,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:17,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:17,561 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 22 treesize of output 38 [2022-03-01 17:48:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:17,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:18,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:18,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:18,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:18,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:18,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71379145] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:18,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:18,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:48:18,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097693732] [2022-03-01 17:48:18,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:18,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:48:18,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:18,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:48:18,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:48:18,067 INFO L87 Difference]: Start difference. First operand 3050 states and 12781 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:18,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:18,904 INFO L93 Difference]: Finished difference Result 3688 states and 15273 transitions. [2022-03-01 17:48:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:48:18,905 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:18,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:18,913 INFO L225 Difference]: With dead ends: 3688 [2022-03-01 17:48:18,913 INFO L226 Difference]: Without dead ends: 3679 [2022-03-01 17:48:18,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:48:18,914 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 205 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:18,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 578 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1374 Invalid, 0 Unknown, 126 Unchecked, 0.5s Time] [2022-03-01 17:48:18,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3679 states. [2022-03-01 17:48:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3679 to 3054. [2022-03-01 17:48:18,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3054 states, 3053 states have (on average 4.19226989846053) internal successors, (12799), 3053 states have internal predecessors, (12799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:18,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 12799 transitions. [2022-03-01 17:48:18,963 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 12799 transitions. Word has length 23 [2022-03-01 17:48:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:18,963 INFO L470 AbstractCegarLoop]: Abstraction has 3054 states and 12799 transitions. [2022-03-01 17:48:18,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:18,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 12799 transitions. [2022-03-01 17:48:18,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:18,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:18,968 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:18,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:19,168 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,SelfDestructingSolverStorable65 [2022-03-01 17:48:19,169 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:19,169 INFO L85 PathProgramCache]: Analyzing trace with hash -579684382, now seen corresponding path program 46 times [2022-03-01 17:48:19,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:19,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806618896] [2022-03-01 17:48:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:19,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:19,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:19,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806618896] [2022-03-01 17:48:19,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806618896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:19,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198850314] [2022-03-01 17:48:19,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:19,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:19,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:19,291 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:19,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 17:48:19,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:19,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:19,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:19,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:19,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:19,453 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 21 treesize of output 37 [2022-03-01 17:48:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:19,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:19,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:19,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:19,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:19,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:19,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198850314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:19,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:19,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:48:20,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689979926] [2022-03-01 17:48:20,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:20,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:48:20,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:48:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:20,000 INFO L87 Difference]: Start difference. First operand 3054 states and 12799 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:21,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:21,190 INFO L93 Difference]: Finished difference Result 3604 states and 14929 transitions. [2022-03-01 17:48:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:48:21,190 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:21,199 INFO L225 Difference]: With dead ends: 3604 [2022-03-01 17:48:21,199 INFO L226 Difference]: Without dead ends: 3595 [2022-03-01 17:48:21,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1679, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:48:21,199 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 330 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:21,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 611 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1438 Invalid, 0 Unknown, 117 Unchecked, 0.6s Time] [2022-03-01 17:48:21,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2022-03-01 17:48:21,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 3058. [2022-03-01 17:48:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3058 states, 3057 states have (on average 4.1920183186130195) internal successors, (12815), 3057 states have internal predecessors, (12815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 12815 transitions. [2022-03-01 17:48:21,246 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 12815 transitions. Word has length 23 [2022-03-01 17:48:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:21,247 INFO L470 AbstractCegarLoop]: Abstraction has 3058 states and 12815 transitions. [2022-03-01 17:48:21,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:21,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 12815 transitions. [2022-03-01 17:48:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:21,252 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:21,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:21,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:21,452 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,SelfDestructingSolverStorable66 [2022-03-01 17:48:21,452 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:21,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:21,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1033882352, now seen corresponding path program 47 times [2022-03-01 17:48:21,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:21,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805039966] [2022-03-01 17:48:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:21,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:21,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:21,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805039966] [2022-03-01 17:48:21,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805039966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:21,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108564771] [2022-03-01 17:48:21,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:48:21,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:21,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:21,578 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:21,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 17:48:21,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:48:21,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:21,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:21,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:21,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:21,740 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 21 treesize of output 37 [2022-03-01 17:48:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:22,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:22,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:22,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:22,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:22,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:22,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108564771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:22,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:22,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:48:22,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346125264] [2022-03-01 17:48:22,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:22,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:48:22,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:22,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:48:22,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:22,323 INFO L87 Difference]: Start difference. First operand 3058 states and 12815 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:23,285 INFO L93 Difference]: Finished difference Result 3577 states and 14834 transitions. [2022-03-01 17:48:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:48:23,285 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:23,293 INFO L225 Difference]: With dead ends: 3577 [2022-03-01 17:48:23,293 INFO L226 Difference]: Without dead ends: 3566 [2022-03-01 17:48:23,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=1539, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:48:23,294 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 281 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:23,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 552 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1260 Invalid, 0 Unknown, 224 Unchecked, 0.5s Time] [2022-03-01 17:48:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2022-03-01 17:48:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 3064. [2022-03-01 17:48:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 3063 states have (on average 4.191642180868429) internal successors, (12839), 3063 states have internal predecessors, (12839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:23,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 12839 transitions. [2022-03-01 17:48:23,340 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 12839 transitions. Word has length 23 [2022-03-01 17:48:23,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:23,340 INFO L470 AbstractCegarLoop]: Abstraction has 3064 states and 12839 transitions. [2022-03-01 17:48:23,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:23,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 12839 transitions. [2022-03-01 17:48:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:23,344 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:23,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:23,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-01 17:48:23,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-01 17:48:23,546 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:23,546 INFO L85 PathProgramCache]: Analyzing trace with hash 370110242, now seen corresponding path program 48 times [2022-03-01 17:48:23,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:23,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906757254] [2022-03-01 17:48:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:23,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:23,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:23,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906757254] [2022-03-01 17:48:23,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906757254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:23,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741122462] [2022-03-01 17:48:23,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:23,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:23,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:23,735 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:23,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 17:48:23,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:48:23,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:23,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:48:23,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:23,950 INFO L353 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2022-03-01 17:48:23,951 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 81 [2022-03-01 17:48:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:24,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:24,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:48:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:24,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741122462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:24,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:24,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2022-03-01 17:48:24,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589235489] [2022-03-01 17:48:24,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:24,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:48:24,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:24,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:48:24,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:48:24,215 INFO L87 Difference]: Start difference. First operand 3064 states and 12839 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:26,347 INFO L93 Difference]: Finished difference Result 4335 states and 17797 transitions. [2022-03-01 17:48:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 17:48:26,348 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:26,357 INFO L225 Difference]: With dead ends: 4335 [2022-03-01 17:48:26,358 INFO L226 Difference]: Without dead ends: 4282 [2022-03-01 17:48:26,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=598, Invalid=3958, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 17:48:26,358 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 464 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 2558 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:26,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 1146 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2558 Invalid, 0 Unknown, 179 Unchecked, 1.0s Time] [2022-03-01 17:48:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2022-03-01 17:48:26,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3068. [2022-03-01 17:48:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 4.1930224975546135) internal successors, (12860), 3067 states have internal predecessors, (12860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 12860 transitions. [2022-03-01 17:48:26,411 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 12860 transitions. Word has length 23 [2022-03-01 17:48:26,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:26,411 INFO L470 AbstractCegarLoop]: Abstraction has 3068 states and 12860 transitions. [2022-03-01 17:48:26,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 12860 transitions. [2022-03-01 17:48:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:26,416 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:26,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:26,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:26,618 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,SelfDestructingSolverStorable68 [2022-03-01 17:48:26,618 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:26,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:26,618 INFO L85 PathProgramCache]: Analyzing trace with hash 495060066, now seen corresponding path program 49 times [2022-03-01 17:48:26,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:26,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163850530] [2022-03-01 17:48:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:26,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:26,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:26,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163850530] [2022-03-01 17:48:26,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163850530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:26,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036888060] [2022-03-01 17:48:26,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:48:26,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:26,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:26,735 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:26,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 17:48:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:26,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:26,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:26,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:26,920 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 22 treesize of output 38 [2022-03-01 17:48:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:27,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:27,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:27,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:27,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:27,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:27,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036888060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:27,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:27,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:48:27,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461420863] [2022-03-01 17:48:27,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:27,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:48:27,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:27,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:48:27,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=512, Unknown=1, NotChecked=0, Total=600 [2022-03-01 17:48:27,572 INFO L87 Difference]: Start difference. First operand 3068 states and 12860 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:28,206 INFO L93 Difference]: Finished difference Result 3526 states and 14627 transitions. [2022-03-01 17:48:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:48:28,207 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:28,214 INFO L225 Difference]: With dead ends: 3526 [2022-03-01 17:48:28,214 INFO L226 Difference]: Without dead ends: 3492 [2022-03-01 17:48:28,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=1091, Unknown=1, NotChecked=0, Total=1260 [2022-03-01 17:48:28,215 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 180 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:28,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 408 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1150 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-03-01 17:48:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2022-03-01 17:48:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3076. [2022-03-01 17:48:28,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3076 states, 3075 states have (on average 4.1934959349593495) internal successors, (12895), 3075 states have internal predecessors, (12895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3076 states to 3076 states and 12895 transitions. [2022-03-01 17:48:28,261 INFO L78 Accepts]: Start accepts. Automaton has 3076 states and 12895 transitions. Word has length 23 [2022-03-01 17:48:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:28,261 INFO L470 AbstractCegarLoop]: Abstraction has 3076 states and 12895 transitions. [2022-03-01 17:48:28,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:28,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3076 states and 12895 transitions. [2022-03-01 17:48:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:28,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:28,266 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:28,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:28,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:28,467 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:28,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:28,467 INFO L85 PathProgramCache]: Analyzing trace with hash -624208832, now seen corresponding path program 50 times [2022-03-01 17:48:28,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:28,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689730420] [2022-03-01 17:48:28,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:28,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:28,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:28,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689730420] [2022-03-01 17:48:28,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689730420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:28,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380843596] [2022-03-01 17:48:28,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:28,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:28,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:28,638 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:28,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 17:48:28,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:28,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:28,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:28,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:28,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:28,868 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 26 treesize of output 42 [2022-03-01 17:48:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:29,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:29,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:29,312 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 21 treesize of output 42 [2022-03-01 17:48:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:29,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380843596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:29,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:29,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-01 17:48:29,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174193979] [2022-03-01 17:48:29,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:29,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:48:29,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:29,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:48:29,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:48:29,372 INFO L87 Difference]: Start difference. First operand 3076 states and 12895 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:29,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:29,973 INFO L93 Difference]: Finished difference Result 3535 states and 14683 transitions. [2022-03-01 17:48:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:48:29,973 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:29,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:29,981 INFO L225 Difference]: With dead ends: 3535 [2022-03-01 17:48:29,982 INFO L226 Difference]: Without dead ends: 3513 [2022-03-01 17:48:29,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:48:29,982 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 180 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:29,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 644 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1094 Invalid, 0 Unknown, 377 Unchecked, 0.4s Time] [2022-03-01 17:48:29,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2022-03-01 17:48:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3084. [2022-03-01 17:48:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 4.193642555951995) internal successors, (12929), 3083 states have internal predecessors, (12929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 12929 transitions. [2022-03-01 17:48:30,033 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 12929 transitions. Word has length 23 [2022-03-01 17:48:30,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:30,033 INFO L470 AbstractCegarLoop]: Abstraction has 3084 states and 12929 transitions. [2022-03-01 17:48:30,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 12929 transitions. [2022-03-01 17:48:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:30,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:30,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:30,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-01 17:48:30,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:30,241 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:30,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:30,242 INFO L85 PathProgramCache]: Analyzing trace with hash -38874880, now seen corresponding path program 51 times [2022-03-01 17:48:30,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:30,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904906855] [2022-03-01 17:48:30,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:30,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:30,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:30,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904906855] [2022-03-01 17:48:30,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904906855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:30,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985214735] [2022-03-01 17:48:30,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:30,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:30,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:30,432 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:30,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 17:48:30,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:48:30,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:30,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:48:30,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:30,619 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-03-01 17:48:30,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 51 [2022-03-01 17:48:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:30,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:30,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:48:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:30,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985214735] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:30,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:30,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2022-03-01 17:48:30,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280417015] [2022-03-01 17:48:30,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:30,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:48:30,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:30,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:48:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:48:30,961 INFO L87 Difference]: Start difference. First operand 3084 states and 12929 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:33,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:33,195 INFO L93 Difference]: Finished difference Result 4295 states and 17669 transitions. [2022-03-01 17:48:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 17:48:33,195 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:33,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:33,205 INFO L225 Difference]: With dead ends: 4295 [2022-03-01 17:48:33,205 INFO L226 Difference]: Without dead ends: 4241 [2022-03-01 17:48:33,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=589, Invalid=3833, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 17:48:33,206 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 369 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 2546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:33,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 872 Invalid, 2546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2349 Invalid, 0 Unknown, 56 Unchecked, 1.0s Time] [2022-03-01 17:48:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2022-03-01 17:48:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 3184. [2022-03-01 17:48:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3184 states, 3183 states have (on average 4.203267357838517) internal successors, (13379), 3183 states have internal predecessors, (13379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 13379 transitions. [2022-03-01 17:48:33,267 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 13379 transitions. Word has length 23 [2022-03-01 17:48:33,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:33,268 INFO L470 AbstractCegarLoop]: Abstraction has 3184 states and 13379 transitions. [2022-03-01 17:48:33,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 13379 transitions. [2022-03-01 17:48:33,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:33,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:33,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:33,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-01 17:48:33,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:33,474 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:33,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:33,474 INFO L85 PathProgramCache]: Analyzing trace with hash -469771314, now seen corresponding path program 52 times [2022-03-01 17:48:33,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:33,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593509924] [2022-03-01 17:48:33,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:33,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:33,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:33,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593509924] [2022-03-01 17:48:33,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593509924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:33,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700171211] [2022-03-01 17:48:33,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:33,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:33,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:33,656 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:33,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 17:48:33,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:33,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:33,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:33,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:33,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:33,864 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 22 treesize of output 38 [2022-03-01 17:48:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:36,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:36,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:36,621 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 21 treesize of output 42 [2022-03-01 17:48:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:36,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700171211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:36,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:36,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-01 17:48:36,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566587798] [2022-03-01 17:48:36,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:36,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:48:36,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:36,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:48:36,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=651, Unknown=1, NotChecked=0, Total=756 [2022-03-01 17:48:36,705 INFO L87 Difference]: Start difference. First operand 3184 states and 13379 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:37,367 INFO L93 Difference]: Finished difference Result 3623 states and 15105 transitions. [2022-03-01 17:48:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:48:37,367 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:37,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:37,375 INFO L225 Difference]: With dead ends: 3623 [2022-03-01 17:48:37,375 INFO L226 Difference]: Without dead ends: 3600 [2022-03-01 17:48:37,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=220, Invalid=1261, Unknown=1, NotChecked=0, Total=1482 [2022-03-01 17:48:37,376 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 146 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:37,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 528 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1045 Invalid, 0 Unknown, 384 Unchecked, 0.4s Time] [2022-03-01 17:48:37,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2022-03-01 17:48:37,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 3184. [2022-03-01 17:48:37,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3184 states, 3183 states have (on average 4.203267357838517) internal successors, (13379), 3183 states have internal predecessors, (13379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:37,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 13379 transitions. [2022-03-01 17:48:37,441 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 13379 transitions. Word has length 23 [2022-03-01 17:48:37,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:37,442 INFO L470 AbstractCegarLoop]: Abstraction has 3184 states and 13379 transitions. [2022-03-01 17:48:37,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:37,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 13379 transitions. [2022-03-01 17:48:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:37,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:37,447 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:37,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-01 17:48:37,647 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,SelfDestructingSolverStorable72 [2022-03-01 17:48:37,647 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:37,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:37,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1298904722, now seen corresponding path program 1 times [2022-03-01 17:48:37,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:37,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617582952] [2022-03-01 17:48:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:37,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:37,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:37,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617582952] [2022-03-01 17:48:37,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617582952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:37,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85043135] [2022-03-01 17:48:37,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:37,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:37,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:37,816 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:37,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 17:48:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:37,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:37,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:38,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:38,001 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 20 treesize of output 36 [2022-03-01 17:48:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:38,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:38,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:38,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:38,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:38,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:38,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85043135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:38,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:38,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:48:38,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747906436] [2022-03-01 17:48:38,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:38,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:48:38,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:38,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:48:38,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:38,511 INFO L87 Difference]: Start difference. First operand 3184 states and 13379 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:39,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:39,300 INFO L93 Difference]: Finished difference Result 3552 states and 14813 transitions. [2022-03-01 17:48:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:48:39,300 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:39,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:39,333 INFO L225 Difference]: With dead ends: 3552 [2022-03-01 17:48:39,333 INFO L226 Difference]: Without dead ends: 3537 [2022-03-01 17:48:39,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:48:39,333 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 159 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:39,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 571 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1289 Invalid, 0 Unknown, 82 Unchecked, 0.5s Time] [2022-03-01 17:48:39,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2022-03-01 17:48:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 3190. [2022-03-01 17:48:39,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3190 states, 3189 states have (on average 4.203198494825965) internal successors, (13404), 3189 states have internal predecessors, (13404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3190 states to 3190 states and 13404 transitions. [2022-03-01 17:48:39,377 INFO L78 Accepts]: Start accepts. Automaton has 3190 states and 13404 transitions. Word has length 23 [2022-03-01 17:48:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:39,378 INFO L470 AbstractCegarLoop]: Abstraction has 3190 states and 13404 transitions. [2022-03-01 17:48:39,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3190 states and 13404 transitions. [2022-03-01 17:48:39,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:39,383 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:39,383 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:39,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-01 17:48:39,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:39,585 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:39,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:39,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1433692626, now seen corresponding path program 2 times [2022-03-01 17:48:39,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:39,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764482994] [2022-03-01 17:48:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:39,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:39,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:39,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764482994] [2022-03-01 17:48:39,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764482994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:39,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842143027] [2022-03-01 17:48:39,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:39,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:39,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:39,761 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:39,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 17:48:39,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:39,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:39,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:39,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:39,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:39,968 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 34 treesize of output 50 [2022-03-01 17:48:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:40,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:40,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:40,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:40,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:40,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:40,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842143027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:40,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:40,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:48:40,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161380810] [2022-03-01 17:48:40,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:40,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:48:40,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:40,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:48:40,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:48:40,246 INFO L87 Difference]: Start difference. First operand 3190 states and 13404 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:40,917 INFO L93 Difference]: Finished difference Result 3590 states and 14961 transitions. [2022-03-01 17:48:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:48:40,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:40,925 INFO L225 Difference]: With dead ends: 3590 [2022-03-01 17:48:40,925 INFO L226 Difference]: Without dead ends: 3575 [2022-03-01 17:48:40,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:48:40,926 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 155 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 371 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:40,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 540 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1160 Invalid, 0 Unknown, 371 Unchecked, 0.4s Time] [2022-03-01 17:48:40,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2022-03-01 17:48:40,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 3204. [2022-03-01 17:48:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3204 states, 3203 states have (on average 4.203871370590072) internal successors, (13465), 3203 states have internal predecessors, (13465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 13465 transitions. [2022-03-01 17:48:40,991 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 13465 transitions. Word has length 23 [2022-03-01 17:48:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:40,991 INFO L470 AbstractCegarLoop]: Abstraction has 3204 states and 13465 transitions. [2022-03-01 17:48:40,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:40,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 13465 transitions. [2022-03-01 17:48:40,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:40,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:40,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:41,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:41,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:41,197 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:41,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:41,198 INFO L85 PathProgramCache]: Analyzing trace with hash -848358674, now seen corresponding path program 3 times [2022-03-01 17:48:41,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:41,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797043020] [2022-03-01 17:48:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:41,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:41,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:41,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797043020] [2022-03-01 17:48:41,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797043020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:41,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436250723] [2022-03-01 17:48:41,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:41,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:41,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:41,379 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:41,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 17:48:41,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:48:41,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:41,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:41,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:41,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:41,571 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:48:41,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 58 [2022-03-01 17:48:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:41,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:41,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436250723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:41,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:41,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:48:41,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706335798] [2022-03-01 17:48:41,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:41,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:48:41,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:41,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:48:41,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:48:41,926 INFO L87 Difference]: Start difference. First operand 3204 states and 13465 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2022-03-01 17:48:43,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:43,892 INFO L93 Difference]: Finished difference Result 4394 states and 18106 transitions. [2022-03-01 17:48:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 17:48:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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 23 [2022-03-01 17:48:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:43,902 INFO L225 Difference]: With dead ends: 4394 [2022-03-01 17:48:43,902 INFO L226 Difference]: Without dead ends: 4350 [2022-03-01 17:48:43,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=393, Invalid=2799, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 17:48:43,903 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 472 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:43,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 760 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 17:48:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4350 states. [2022-03-01 17:48:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4350 to 3224. [2022-03-01 17:48:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 3223 states have (on average 4.205708966801117) internal successors, (13555), 3223 states have internal predecessors, (13555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 13555 transitions. [2022-03-01 17:48:43,954 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 13555 transitions. Word has length 23 [2022-03-01 17:48:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:43,954 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 13555 transitions. [2022-03-01 17:48:43,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2022-03-01 17:48:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 13555 transitions. [2022-03-01 17:48:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:43,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:43,959 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:43,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-01 17:48:44,159 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,SelfDestructingSolverStorable75 [2022-03-01 17:48:44,160 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:44,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:44,160 INFO L85 PathProgramCache]: Analyzing trace with hash 765208060, now seen corresponding path program 4 times [2022-03-01 17:48:44,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:44,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222471803] [2022-03-01 17:48:44,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:44,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:44,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:44,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222471803] [2022-03-01 17:48:44,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222471803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:44,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527845332] [2022-03-01 17:48:44,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:44,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:44,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:44,338 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:44,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 17:48:44,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:44,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:44,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:44,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:44,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:44,537 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 25 treesize of output 41 [2022-03-01 17:48:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:45,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:45,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:45,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:45,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:45,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:45,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527845332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:45,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:45,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:48:45,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496080596] [2022-03-01 17:48:45,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:45,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:48:45,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:45,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:48:45,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:45,392 INFO L87 Difference]: Start difference. First operand 3224 states and 13555 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:46,426 INFO L93 Difference]: Finished difference Result 3623 states and 15100 transitions. [2022-03-01 17:48:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:48:46,426 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:48:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:46,434 INFO L225 Difference]: With dead ends: 3623 [2022-03-01 17:48:46,434 INFO L226 Difference]: Without dead ends: 3608 [2022-03-01 17:48:46,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:48:46,434 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 212 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:46,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 494 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1189 Invalid, 0 Unknown, 136 Unchecked, 0.5s Time] [2022-03-01 17:48:46,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2022-03-01 17:48:46,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3224. [2022-03-01 17:48:46,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 3223 states have (on average 4.205088426931431) internal successors, (13553), 3223 states have internal predecessors, (13553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 13553 transitions. [2022-03-01 17:48:46,481 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 13553 transitions. Word has length 23 [2022-03-01 17:48:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:46,481 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 13553 transitions. [2022-03-01 17:48:46,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 13553 transitions. [2022-03-01 17:48:46,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:46,487 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:46,487 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:46,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:46,688 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,SelfDestructingSolverStorable76 [2022-03-01 17:48:46,688 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:46,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:46,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1279255108, now seen corresponding path program 5 times [2022-03-01 17:48:46,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:46,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638858297] [2022-03-01 17:48:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:46,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:46,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:46,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638858297] [2022-03-01 17:48:46,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638858297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:46,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567946939] [2022-03-01 17:48:46,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:48:46,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:46,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:46,855 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:46,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 17:48:46,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:46,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:46,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:46,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:47,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:47,060 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 20 treesize of output 36 [2022-03-01 17:48:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:47,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:47,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:47,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:47,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:47,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:47,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567946939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:47,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:47,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:48:47,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692270166] [2022-03-01 17:48:47,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:47,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:48:47,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:47,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:48:47,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:47,595 INFO L87 Difference]: Start difference. First operand 3224 states and 13553 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:48,326 INFO L93 Difference]: Finished difference Result 3559 states and 14847 transitions. [2022-03-01 17:48:48,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:48:48,327 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:48,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:48,334 INFO L225 Difference]: With dead ends: 3559 [2022-03-01 17:48:48,335 INFO L226 Difference]: Without dead ends: 3544 [2022-03-01 17:48:48,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:48:48,335 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 157 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:48,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 510 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1144 Invalid, 0 Unknown, 148 Unchecked, 0.5s Time] [2022-03-01 17:48:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2022-03-01 17:48:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 3224. [2022-03-01 17:48:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 3223 states have (on average 4.205088426931431) internal successors, (13553), 3223 states have internal predecessors, (13553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 13553 transitions. [2022-03-01 17:48:48,384 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 13553 transitions. Word has length 23 [2022-03-01 17:48:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:48,384 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 13553 transitions. [2022-03-01 17:48:48,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:48,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 13553 transitions. [2022-03-01 17:48:48,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:48,390 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:48,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:48,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-01 17:48:48,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:48,590 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:48,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:48,591 INFO L85 PathProgramCache]: Analyzing trace with hash -439373552, now seen corresponding path program 6 times [2022-03-01 17:48:48,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:48,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064745048] [2022-03-01 17:48:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:48,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:48,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:48,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064745048] [2022-03-01 17:48:48,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064745048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:48,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065738444] [2022-03-01 17:48:48,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:48,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:48,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:48,742 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:48:48,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 17:48:48,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:48:48,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:48,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:48,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:48,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:48,913 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 22 treesize of output 38 [2022-03-01 17:48:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:49,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:49,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:49,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:49,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:49,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:49,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065738444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:49,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:49,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:48:49,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031086030] [2022-03-01 17:48:49,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:49,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:48:49,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:49,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:48:49,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:49,422 INFO L87 Difference]: Start difference. First operand 3224 states and 13553 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:50,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:50,196 INFO L93 Difference]: Finished difference Result 3892 states and 16164 transitions. [2022-03-01 17:48:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:48:50,201 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:48:50,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:50,211 INFO L225 Difference]: With dead ends: 3892 [2022-03-01 17:48:50,211 INFO L226 Difference]: Without dead ends: 3870 [2022-03-01 17:48:50,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:48:50,212 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 230 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:50,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 585 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1317 Invalid, 0 Unknown, 46 Unchecked, 0.5s Time] [2022-03-01 17:48:50,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2022-03-01 17:48:50,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3244. [2022-03-01 17:48:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3244 states, 3243 states have (on average 4.2069071847055195) internal successors, (13643), 3243 states have internal predecessors, (13643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 13643 transitions. [2022-03-01 17:48:50,271 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 13643 transitions. Word has length 23 [2022-03-01 17:48:50,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:50,271 INFO L470 AbstractCegarLoop]: Abstraction has 3244 states and 13643 transitions. [2022-03-01 17:48:50,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:50,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 13643 transitions. [2022-03-01 17:48:50,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:50,276 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:50,276 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:50,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-01 17:48:50,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:50,477 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:50,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash 145960400, now seen corresponding path program 7 times [2022-03-01 17:48:50,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:50,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319039632] [2022-03-01 17:48:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:50,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:50,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:50,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319039632] [2022-03-01 17:48:50,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319039632] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:50,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621497748] [2022-03-01 17:48:50,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:48:50,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:50,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:50,651 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) [2022-03-01 17:48:50,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-01 17:48:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:50,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:50,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:50,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:50,810 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 21 treesize of output 37 [2022-03-01 17:48:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:51,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:51,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:51,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:51,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:51,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:51,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621497748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:51,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:51,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:48:51,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730394229] [2022-03-01 17:48:51,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:51,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:48:51,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:51,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:48:51,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:51,375 INFO L87 Difference]: Start difference. First operand 3244 states and 13643 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:52,203 INFO L93 Difference]: Finished difference Result 3827 states and 15901 transitions. [2022-03-01 17:48:52,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:48:52,203 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:48:52,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:52,211 INFO L225 Difference]: With dead ends: 3827 [2022-03-01 17:48:52,212 INFO L226 Difference]: Without dead ends: 3801 [2022-03-01 17:48:52,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:48:52,212 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 246 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:52,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 499 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1166 Invalid, 0 Unknown, 130 Unchecked, 0.5s Time] [2022-03-01 17:48:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2022-03-01 17:48:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3248. [2022-03-01 17:48:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 4.2066522944256235) internal successors, (13659), 3247 states have internal predecessors, (13659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 13659 transitions. [2022-03-01 17:48:52,267 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 13659 transitions. Word has length 23 [2022-03-01 17:48:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:52,267 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 13659 transitions. [2022-03-01 17:48:52,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 13659 transitions. [2022-03-01 17:48:52,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:52,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:52,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:52,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-01 17:48:52,473 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,SelfDestructingSolverStorable79 [2022-03-01 17:48:52,473 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1759527134, now seen corresponding path program 8 times [2022-03-01 17:48:52,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:52,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310388114] [2022-03-01 17:48:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:52,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:52,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:52,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310388114] [2022-03-01 17:48:52,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310388114] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:52,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119994824] [2022-03-01 17:48:52,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:52,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:52,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:52,640 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) [2022-03-01 17:48:52,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-01 17:48:52,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:52,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:52,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:52,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:52,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:52,803 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 21 treesize of output 37 [2022-03-01 17:48:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:53,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:53,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:53,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:53,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:53,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:53,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119994824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:53,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:53,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:48:53,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412393253] [2022-03-01 17:48:53,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:53,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:48:53,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:53,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:48:53,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:53,504 INFO L87 Difference]: Start difference. First operand 3248 states and 13659 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:54,360 INFO L93 Difference]: Finished difference Result 3767 states and 15663 transitions. [2022-03-01 17:48:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:48:54,360 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:48:54,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:54,369 INFO L225 Difference]: With dead ends: 3767 [2022-03-01 17:48:54,369 INFO L226 Difference]: Without dead ends: 3746 [2022-03-01 17:48:54,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:48:54,369 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 226 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:54,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 533 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1139 Invalid, 0 Unknown, 143 Unchecked, 0.5s Time] [2022-03-01 17:48:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3746 states. [2022-03-01 17:48:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3746 to 3240. [2022-03-01 17:48:54,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 3239 states have (on average 4.2065452300092625) internal successors, (13625), 3239 states have internal predecessors, (13625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 13625 transitions. [2022-03-01 17:48:54,424 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 13625 transitions. Word has length 23 [2022-03-01 17:48:54,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:54,424 INFO L470 AbstractCegarLoop]: Abstraction has 3240 states and 13625 transitions. [2022-03-01 17:48:54,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:54,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 13625 transitions. [2022-03-01 17:48:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:54,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:54,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:54,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:54,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:54,631 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:54,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:54,631 INFO L85 PathProgramCache]: Analyzing trace with hash -89876174, now seen corresponding path program 9 times [2022-03-01 17:48:54,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:54,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854165659] [2022-03-01 17:48:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:54,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:54,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:54,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854165659] [2022-03-01 17:48:54,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854165659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:54,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136713144] [2022-03-01 17:48:54,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:54,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:54,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:54,798 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) [2022-03-01 17:48:54,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-01 17:48:54,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:48:54,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:54,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:48:54,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:54,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:55,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-03-01 17:48:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:55,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:55,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:55,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:55,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:55,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:55,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136713144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:55,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:55,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:48:55,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704141477] [2022-03-01 17:48:55,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:55,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:48:55,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:55,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:48:55,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:55,393 INFO L87 Difference]: Start difference. First operand 3240 states and 13625 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:56,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:56,221 INFO L93 Difference]: Finished difference Result 4017 states and 16647 transitions. [2022-03-01 17:48:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:48:56,222 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:48:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:56,230 INFO L225 Difference]: With dead ends: 4017 [2022-03-01 17:48:56,231 INFO L226 Difference]: Without dead ends: 3986 [2022-03-01 17:48:56,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:48:56,231 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 238 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:56,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 676 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1617 Invalid, 0 Unknown, 187 Unchecked, 0.6s Time] [2022-03-01 17:48:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2022-03-01 17:48:56,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3255. [2022-03-01 17:48:56,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 3254 states have (on average 4.20620774431469) internal successors, (13687), 3254 states have internal predecessors, (13687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 13687 transitions. [2022-03-01 17:48:56,281 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 13687 transitions. Word has length 23 [2022-03-01 17:48:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:56,281 INFO L470 AbstractCegarLoop]: Abstraction has 3255 states and 13687 transitions. [2022-03-01 17:48:56,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:56,281 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 13687 transitions. [2022-03-01 17:48:56,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:56,286 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:56,286 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:56,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:56,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:56,487 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:56,487 INFO L85 PathProgramCache]: Analyzing trace with hash -8477118, now seen corresponding path program 10 times [2022-03-01 17:48:56,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:56,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688417971] [2022-03-01 17:48:56,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:56,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:56,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:56,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688417971] [2022-03-01 17:48:56,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688417971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:56,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41236336] [2022-03-01 17:48:56,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:56,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:56,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:56,662 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) [2022-03-01 17:48:56,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-01 17:48:56,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:56,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:56,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:56,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:56,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:56,817 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 21 treesize of output 37 [2022-03-01 17:48:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:57,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:57,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:57,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:57,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:57,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:57,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41236336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:57,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:57,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:48:57,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845138695] [2022-03-01 17:48:57,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:57,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:48:57,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:57,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:48:57,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:57,381 INFO L87 Difference]: Start difference. First operand 3255 states and 13687 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:58,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:58,356 INFO L93 Difference]: Finished difference Result 3847 states and 15979 transitions. [2022-03-01 17:48:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:48:58,356 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:48:58,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:58,365 INFO L225 Difference]: With dead ends: 3847 [2022-03-01 17:48:58,366 INFO L226 Difference]: Without dead ends: 3821 [2022-03-01 17:48:58,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:48:58,366 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 269 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:58,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 468 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1161 Invalid, 0 Unknown, 201 Unchecked, 0.5s Time] [2022-03-01 17:48:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2022-03-01 17:48:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3259. [2022-03-01 17:48:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 3258 states have (on average 4.2059545733578885) internal successors, (13703), 3258 states have internal predecessors, (13703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 13703 transitions. [2022-03-01 17:48:58,415 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 13703 transitions. Word has length 23 [2022-03-01 17:48:58,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:58,415 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 13703 transitions. [2022-03-01 17:48:58,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:58,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 13703 transitions. [2022-03-01 17:48:58,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:48:58,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:58,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:48:58,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:58,620 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,SelfDestructingSolverStorable82 [2022-03-01 17:48:58,621 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:48:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:58,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1605089616, now seen corresponding path program 11 times [2022-03-01 17:48:58,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:58,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887352706] [2022-03-01 17:48:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:58,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:58,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:58,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887352706] [2022-03-01 17:48:58,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887352706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:58,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933206006] [2022-03-01 17:48:58,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:48:58,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:58,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:58,801 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) [2022-03-01 17:48:58,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-01 17:48:58,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:48:58,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:58,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:58,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:58,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:58,970 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 36 treesize of output 52 [2022-03-01 17:48:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:59,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:59,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:59,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:48:59,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:59,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:48:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:59,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933206006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:59,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:59,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:48:59,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088796571] [2022-03-01 17:48:59,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:59,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:48:59,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:59,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:48:59,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:48:59,300 INFO L87 Difference]: Start difference. First operand 3259 states and 13703 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:01,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:01,313 INFO L93 Difference]: Finished difference Result 3907 states and 16241 transitions. [2022-03-01 17:49:01,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:49:01,313 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:01,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:01,324 INFO L225 Difference]: With dead ends: 3907 [2022-03-01 17:49:01,324 INFO L226 Difference]: Without dead ends: 3886 [2022-03-01 17:49:01,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=201, Invalid=917, Unknown=4, NotChecked=0, Total=1122 [2022-03-01 17:49:01,324 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 230 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:01,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 399 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 704 Invalid, 0 Unknown, 195 Unchecked, 0.3s Time] [2022-03-01 17:49:01,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3886 states. [2022-03-01 17:49:01,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3886 to 3259. [2022-03-01 17:49:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 3258 states have (on average 4.2059545733578885) internal successors, (13703), 3258 states have internal predecessors, (13703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 13703 transitions. [2022-03-01 17:49:01,386 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 13703 transitions. Word has length 23 [2022-03-01 17:49:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:01,387 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 13703 transitions. [2022-03-01 17:49:01,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 13703 transitions. [2022-03-01 17:49:01,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:01,393 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:01,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:01,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:01,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:01,594 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:01,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:01,594 INFO L85 PathProgramCache]: Analyzing trace with hash 475707936, now seen corresponding path program 12 times [2022-03-01 17:49:01,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:01,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897823132] [2022-03-01 17:49:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:01,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:01,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:01,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897823132] [2022-03-01 17:49:01,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897823132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:01,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355012513] [2022-03-01 17:49:01,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:01,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:01,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:01,774 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) [2022-03-01 17:49:01,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-01 17:49:01,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:49:01,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:01,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:01,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:01,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:01,978 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 20 treesize of output 36 [2022-03-01 17:49:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:02,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:02,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:02,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:02,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:02,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:02,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355012513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:02,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:02,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:49:02,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141770187] [2022-03-01 17:49:02,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:02,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:49:02,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:02,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:49:02,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:49:02,576 INFO L87 Difference]: Start difference. First operand 3259 states and 13703 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:03,592 INFO L93 Difference]: Finished difference Result 3735 states and 15541 transitions. [2022-03-01 17:49:03,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:49:03,592 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:03,602 INFO L225 Difference]: With dead ends: 3735 [2022-03-01 17:49:03,602 INFO L226 Difference]: Without dead ends: 3713 [2022-03-01 17:49:03,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:49:03,602 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 185 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:03,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 624 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1563 Invalid, 0 Unknown, 97 Unchecked, 0.7s Time] [2022-03-01 17:49:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2022-03-01 17:49:03,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 3267. [2022-03-01 17:49:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3267 states, 3266 states have (on average 4.206062461726883) internal successors, (13737), 3266 states have internal predecessors, (13737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 13737 transitions. [2022-03-01 17:49:03,661 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 13737 transitions. Word has length 23 [2022-03-01 17:49:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:03,662 INFO L470 AbstractCegarLoop]: Abstraction has 3267 states and 13737 transitions. [2022-03-01 17:49:03,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:03,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 13737 transitions. [2022-03-01 17:49:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:03,668 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:03,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:03,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-01 17:49:03,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:03,868 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:03,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:03,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1061041888, now seen corresponding path program 13 times [2022-03-01 17:49:03,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:03,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80053011] [2022-03-01 17:49:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:03,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:04,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:04,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80053011] [2022-03-01 17:49:04,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80053011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:04,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313393163] [2022-03-01 17:49:04,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:04,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:04,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:04,057 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) [2022-03-01 17:49:04,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-01 17:49:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:04,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:04,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:04,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:04,237 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 21 treesize of output 37 [2022-03-01 17:49:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:04,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:04,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:04,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:04,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:04,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:04,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313393163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:04,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:04,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:49:04,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188522009] [2022-03-01 17:49:04,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:04,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:49:04,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:04,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:49:04,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:49:04,788 INFO L87 Difference]: Start difference. First operand 3267 states and 13737 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:05,673 INFO L93 Difference]: Finished difference Result 3665 states and 15262 transitions. [2022-03-01 17:49:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:49:05,673 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:49:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:05,683 INFO L225 Difference]: With dead ends: 3665 [2022-03-01 17:49:05,683 INFO L226 Difference]: Without dead ends: 3639 [2022-03-01 17:49:05,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:49:05,684 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 214 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:05,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 528 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1275 Invalid, 0 Unknown, 106 Unchecked, 0.5s Time] [2022-03-01 17:49:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2022-03-01 17:49:05,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 3267. [2022-03-01 17:49:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3267 states, 3266 states have (on average 4.206062461726883) internal successors, (13737), 3266 states have internal predecessors, (13737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:05,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 13737 transitions. [2022-03-01 17:49:05,737 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 13737 transitions. Word has length 23 [2022-03-01 17:49:05,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:05,738 INFO L470 AbstractCegarLoop]: Abstraction has 3267 states and 13737 transitions. [2022-03-01 17:49:05,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:05,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 13737 transitions. [2022-03-01 17:49:05,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:05,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:05,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:05,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-01 17:49:05,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:05,944 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:05,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1620358674, now seen corresponding path program 14 times [2022-03-01 17:49:05,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:05,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065639237] [2022-03-01 17:49:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:05,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:06,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:06,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065639237] [2022-03-01 17:49:06,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065639237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:06,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65936508] [2022-03-01 17:49:06,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:06,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:06,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:06,144 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) [2022-03-01 17:49:06,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-01 17:49:06,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:06,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:06,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:06,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:06,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:06,384 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 21 treesize of output 37 [2022-03-01 17:49:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:06,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:06,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:06,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:06,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:06,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:07,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65936508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:07,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:07,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:49:07,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576127535] [2022-03-01 17:49:07,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:07,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:49:07,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:49:07,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:49:07,023 INFO L87 Difference]: Start difference. First operand 3267 states and 13737 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:07,993 INFO L93 Difference]: Finished difference Result 3663 states and 15254 transitions. [2022-03-01 17:49:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:49:07,993 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:49:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:08,001 INFO L225 Difference]: With dead ends: 3663 [2022-03-01 17:49:08,001 INFO L226 Difference]: Without dead ends: 3642 [2022-03-01 17:49:08,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:49:08,001 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 201 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:08,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 554 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1327 Invalid, 0 Unknown, 109 Unchecked, 0.5s Time] [2022-03-01 17:49:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2022-03-01 17:49:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 3263. [2022-03-01 17:49:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 4.20570202329859) internal successors, (13719), 3262 states have internal predecessors, (13719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 13719 transitions. [2022-03-01 17:49:08,050 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 13719 transitions. Word has length 23 [2022-03-01 17:49:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:08,050 INFO L470 AbstractCegarLoop]: Abstraction has 3263 states and 13719 transitions. [2022-03-01 17:49:08,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:08,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 13719 transitions. [2022-03-01 17:49:08,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:08,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:08,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:08,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:08,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:08,255 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:08,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:08,256 INFO L85 PathProgramCache]: Analyzing trace with hash 630145454, now seen corresponding path program 15 times [2022-03-01 17:49:08,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:08,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106638554] [2022-03-01 17:49:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:08,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:08,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:08,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106638554] [2022-03-01 17:49:08,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106638554] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:08,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530962117] [2022-03-01 17:49:08,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:08,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:08,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:08,408 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) [2022-03-01 17:49:08,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-01 17:49:08,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:49:08,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:08,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:49:08,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:08,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:08,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:08,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:08,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:08,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 17:49:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:08,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:08,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:08,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:08,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:08,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:09,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530962117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:09,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:09,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:49:09,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735718184] [2022-03-01 17:49:09,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:09,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:49:09,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:09,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:49:09,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:49:09,006 INFO L87 Difference]: Start difference. First operand 3263 states and 13719 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:09,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:09,697 INFO L93 Difference]: Finished difference Result 3607 states and 15038 transitions. [2022-03-01 17:49:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:49:09,697 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:09,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:09,706 INFO L225 Difference]: With dead ends: 3607 [2022-03-01 17:49:09,706 INFO L226 Difference]: Without dead ends: 3584 [2022-03-01 17:49:09,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:49:09,706 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 176 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:09,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 497 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:49:09,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2022-03-01 17:49:09,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 3263. [2022-03-01 17:49:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 4.20570202329859) internal successors, (13719), 3262 states have internal predecessors, (13719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 13719 transitions. [2022-03-01 17:49:09,756 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 13719 transitions. Word has length 23 [2022-03-01 17:49:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:09,756 INFO L470 AbstractCegarLoop]: Abstraction has 3263 states and 13719 transitions. [2022-03-01 17:49:09,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:09,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 13719 transitions. [2022-03-01 17:49:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:09,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:09,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:09,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:09,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:09,962 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:09,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:09,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1608187924, now seen corresponding path program 7 times [2022-03-01 17:49:09,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:09,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364873265] [2022-03-01 17:49:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:09,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:10,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:10,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364873265] [2022-03-01 17:49:10,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364873265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:10,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570444435] [2022-03-01 17:49:10,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:10,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:10,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:10,131 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) [2022-03-01 17:49:10,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-01 17:49:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:10,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:10,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:10,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:10,353 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 33 treesize of output 45 [2022-03-01 17:49:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:10,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:10,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:10,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:10,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:10,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:10,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570444435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:10,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:10,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-01 17:49:10,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563395123] [2022-03-01 17:49:10,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:10,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:49:10,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:10,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:49:10,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:49:10,867 INFO L87 Difference]: Start difference. First operand 3263 states and 13719 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:11,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:11,725 INFO L93 Difference]: Finished difference Result 3634 states and 15150 transitions. [2022-03-01 17:49:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:49:11,726 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:11,734 INFO L225 Difference]: With dead ends: 3634 [2022-03-01 17:49:11,734 INFO L226 Difference]: Without dead ends: 3617 [2022-03-01 17:49:11,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:49:11,735 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 181 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:11,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 414 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:49:11,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2022-03-01 17:49:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3292. [2022-03-01 17:49:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3292 states, 3291 states have (on average 4.205408690367669) internal successors, (13840), 3291 states have internal predecessors, (13840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3292 states to 3292 states and 13840 transitions. [2022-03-01 17:49:11,785 INFO L78 Accepts]: Start accepts. Automaton has 3292 states and 13840 transitions. Word has length 23 [2022-03-01 17:49:11,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:11,785 INFO L470 AbstractCegarLoop]: Abstraction has 3292 states and 13840 transitions. [2022-03-01 17:49:11,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:11,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3292 states and 13840 transitions. [2022-03-01 17:49:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:11,791 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:11,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:11,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-01 17:49:11,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-01 17:49:11,991 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:11,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:11,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2030122192, now seen corresponding path program 8 times [2022-03-01 17:49:11,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:11,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986842881] [2022-03-01 17:49:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:11,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:12,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:12,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986842881] [2022-03-01 17:49:12,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986842881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:12,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507192686] [2022-03-01 17:49:12,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:12,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:12,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:12,138 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) [2022-03-01 17:49:12,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-01 17:49:12,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:12,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:12,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:49:12,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:12,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:12,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:12,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:12,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:12,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 17:49:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:12,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:12,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:12,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:12,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:12,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:12,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507192686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:12,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:12,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:49:12,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165174848] [2022-03-01 17:49:12,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:12,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:49:12,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:12,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:49:12,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:49:12,716 INFO L87 Difference]: Start difference. First operand 3292 states and 13840 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:13,606 INFO L93 Difference]: Finished difference Result 3875 states and 16090 transitions. [2022-03-01 17:49:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:49:13,606 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:13,616 INFO L225 Difference]: With dead ends: 3875 [2022-03-01 17:49:13,616 INFO L226 Difference]: Without dead ends: 3834 [2022-03-01 17:49:13,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:49:13,617 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 223 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:13,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 477 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:49:13,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2022-03-01 17:49:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3324. [2022-03-01 17:49:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3323 states have (on average 4.204935299428228) internal successors, (13973), 3323 states have internal predecessors, (13973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 13973 transitions. [2022-03-01 17:49:13,671 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 13973 transitions. Word has length 23 [2022-03-01 17:49:13,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:13,672 INFO L470 AbstractCegarLoop]: Abstraction has 3324 states and 13973 transitions. [2022-03-01 17:49:13,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 13973 transitions. [2022-03-01 17:49:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:13,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:13,677 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:13,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:13,878 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,SelfDestructingSolverStorable89 [2022-03-01 17:49:13,878 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:13,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1358684144, now seen corresponding path program 9 times [2022-03-01 17:49:13,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:13,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451849664] [2022-03-01 17:49:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:14,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:14,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451849664] [2022-03-01 17:49:14,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451849664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:14,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353688131] [2022-03-01 17:49:14,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:14,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:14,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:14,034 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) [2022-03-01 17:49:14,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-01 17:49:14,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:49:14,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:14,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:49:14,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:14,241 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-03-01 17:49:14,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 51 [2022-03-01 17:49:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:14,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:14,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353688131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:14,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:14,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:49:14,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105926734] [2022-03-01 17:49:14,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:14,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:49:14,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:14,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:49:14,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:49:14,596 INFO L87 Difference]: Start difference. First operand 3324 states and 13973 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2022-03-01 17:49:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:16,918 INFO L93 Difference]: Finished difference Result 4966 states and 20471 transitions. [2022-03-01 17:49:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 17:49:16,919 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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 23 [2022-03-01 17:49:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:16,930 INFO L225 Difference]: With dead ends: 4966 [2022-03-01 17:49:16,931 INFO L226 Difference]: Without dead ends: 4910 [2022-03-01 17:49:16,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=530, Invalid=3760, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 17:49:16,931 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 514 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 2713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:16,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 915 Invalid, 2713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 17:49:16,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2022-03-01 17:49:16,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 3399. [2022-03-01 17:49:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 3398 states have (on average 4.212772218952325) internal successors, (14315), 3398 states have internal predecessors, (14315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 14315 transitions. [2022-03-01 17:49:16,996 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 14315 transitions. Word has length 23 [2022-03-01 17:49:16,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:16,996 INFO L470 AbstractCegarLoop]: Abstraction has 3399 states and 14315 transitions. [2022-03-01 17:49:16,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2022-03-01 17:49:16,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 14315 transitions. [2022-03-01 17:49:17,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:17,002 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:17,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:17,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-01 17:49:17,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:17,203 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:17,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:17,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1860571996, now seen corresponding path program 10 times [2022-03-01 17:49:17,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:17,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636656770] [2022-03-01 17:49:17,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:17,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:17,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:17,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636656770] [2022-03-01 17:49:17,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636656770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:17,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918858546] [2022-03-01 17:49:17,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:17,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:17,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:17,355 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) [2022-03-01 17:49:17,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-01 17:49:17,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:17,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:17,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:17,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:17,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:17,523 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 26 treesize of output 40 [2022-03-01 17:49:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:17,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:18,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:18,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:18,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:18,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:18,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918858546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:18,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:18,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:49:18,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390510314] [2022-03-01 17:49:18,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:18,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:49:18,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:18,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:49:18,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:49:18,126 INFO L87 Difference]: Start difference. First operand 3399 states and 14315 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:19,748 INFO L93 Difference]: Finished difference Result 4102 states and 17044 transitions. [2022-03-01 17:49:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:49:19,748 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:19,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:19,758 INFO L225 Difference]: With dead ends: 4102 [2022-03-01 17:49:19,758 INFO L226 Difference]: Without dead ends: 4056 [2022-03-01 17:49:19,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=325, Invalid=1655, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:49:19,758 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 278 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:19,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 530 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:49:19,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4056 states. [2022-03-01 17:49:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4056 to 3441. [2022-03-01 17:49:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3441 states, 3440 states have (on average 4.214244186046511) internal successors, (14497), 3440 states have internal predecessors, (14497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3441 states to 3441 states and 14497 transitions. [2022-03-01 17:49:19,814 INFO L78 Accepts]: Start accepts. Automaton has 3441 states and 14497 transitions. Word has length 23 [2022-03-01 17:49:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:19,814 INFO L470 AbstractCegarLoop]: Abstraction has 3441 states and 14497 transitions. [2022-03-01 17:49:19,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3441 states and 14497 transitions. [2022-03-01 17:49:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:19,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:19,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:19,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:20,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:20,020 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash 936147684, now seen corresponding path program 11 times [2022-03-01 17:49:20,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:20,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061023240] [2022-03-01 17:49:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:20,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:20,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:20,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061023240] [2022-03-01 17:49:20,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061023240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:20,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889051285] [2022-03-01 17:49:20,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:20,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:20,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:20,168 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) [2022-03-01 17:49:20,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-01 17:49:20,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:49:20,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:20,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:20,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:20,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:20,380 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 29 treesize of output 41 [2022-03-01 17:49:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:20,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:20,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:20,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:20,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:20,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:20,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889051285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:20,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:20,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:49:20,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530377778] [2022-03-01 17:49:20,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:20,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:49:20,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:20,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:49:20,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:49:20,850 INFO L87 Difference]: Start difference. First operand 3441 states and 14497 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:21,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:21,879 INFO L93 Difference]: Finished difference Result 3932 states and 16416 transitions. [2022-03-01 17:49:21,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:49:21,879 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:21,888 INFO L225 Difference]: With dead ends: 3932 [2022-03-01 17:49:21,888 INFO L226 Difference]: Without dead ends: 3907 [2022-03-01 17:49:21,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:49:21,889 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 184 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:21,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 517 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:49:21,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2022-03-01 17:49:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3447. [2022-03-01 17:49:21,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 4.2147417295414975) internal successors, (14524), 3446 states have internal predecessors, (14524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:21,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 14524 transitions. [2022-03-01 17:49:21,941 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 14524 transitions. Word has length 23 [2022-03-01 17:49:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:21,942 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 14524 transitions. [2022-03-01 17:49:21,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 14524 transitions. [2022-03-01 17:49:21,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:21,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:21,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:21,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:22,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:22,148 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:22,148 INFO L85 PathProgramCache]: Analyzing trace with hash 921284856, now seen corresponding path program 12 times [2022-03-01 17:49:22,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:22,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505957688] [2022-03-01 17:49:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:22,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:22,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:22,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505957688] [2022-03-01 17:49:22,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505957688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:22,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793908486] [2022-03-01 17:49:22,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:22,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:22,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:22,299 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) [2022-03-01 17:49:22,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-01 17:49:22,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:49:22,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:22,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:22,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:22,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:22,466 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 22 treesize of output 38 [2022-03-01 17:49:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:22,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:22,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:22,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:22,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:22,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:22,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793908486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:22,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:22,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:49:22,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30947175] [2022-03-01 17:49:22,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:22,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:49:22,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:22,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:49:22,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:49:22,935 INFO L87 Difference]: Start difference. First operand 3447 states and 14524 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:23,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:23,761 INFO L93 Difference]: Finished difference Result 4240 states and 17590 transitions. [2022-03-01 17:49:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:49:23,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:23,771 INFO L225 Difference]: With dead ends: 4240 [2022-03-01 17:49:23,771 INFO L226 Difference]: Without dead ends: 4205 [2022-03-01 17:49:23,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:49:23,771 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 242 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:23,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 552 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1381 Invalid, 0 Unknown, 308 Unchecked, 0.5s Time] [2022-03-01 17:49:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4205 states. [2022-03-01 17:49:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4205 to 3458. [2022-03-01 17:49:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3458 states, 3457 states have (on average 4.2157940410760775) internal successors, (14574), 3457 states have internal predecessors, (14574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 14574 transitions. [2022-03-01 17:49:23,828 INFO L78 Accepts]: Start accepts. Automaton has 3458 states and 14574 transitions. Word has length 23 [2022-03-01 17:49:23,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:23,828 INFO L470 AbstractCegarLoop]: Abstraction has 3458 states and 14574 transitions. [2022-03-01 17:49:23,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states and 14574 transitions. [2022-03-01 17:49:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:23,847 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:23,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:23,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-01 17:49:24,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:24,052 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:24,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:24,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1509030178, now seen corresponding path program 13 times [2022-03-01 17:49:24,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:24,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153669134] [2022-03-01 17:49:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:24,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:24,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:24,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153669134] [2022-03-01 17:49:24,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153669134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:24,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176591731] [2022-03-01 17:49:24,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:24,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:24,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:24,213 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) [2022-03-01 17:49:24,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-01 17:49:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:24,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:24,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:24,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:24,362 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 21 treesize of output 37 [2022-03-01 17:49:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:24,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:24,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:24,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:24,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:24,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:24,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176591731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:24,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:24,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:49:24,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877742564] [2022-03-01 17:49:24,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:24,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:49:24,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:24,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:49:24,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:49:24,884 INFO L87 Difference]: Start difference. First operand 3458 states and 14574 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:25,879 INFO L93 Difference]: Finished difference Result 4284 states and 17746 transitions. [2022-03-01 17:49:25,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:49:25,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:25,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:25,889 INFO L225 Difference]: With dead ends: 4284 [2022-03-01 17:49:25,889 INFO L226 Difference]: Without dead ends: 4228 [2022-03-01 17:49:25,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:49:25,890 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 261 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:25,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 495 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1286 Invalid, 0 Unknown, 368 Unchecked, 0.5s Time] [2022-03-01 17:49:25,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4228 states. [2022-03-01 17:49:25,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4228 to 3470. [2022-03-01 17:49:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 3469 states have (on average 4.216200634188527) internal successors, (14626), 3469 states have internal predecessors, (14626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 14626 transitions. [2022-03-01 17:49:25,960 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 14626 transitions. Word has length 23 [2022-03-01 17:49:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:25,961 INFO L470 AbstractCegarLoop]: Abstraction has 3470 states and 14626 transitions. [2022-03-01 17:49:25,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 14626 transitions. [2022-03-01 17:49:25,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:25,966 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:25,966 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:25,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-01 17:49:26,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:26,167 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:26,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1710225962, now seen corresponding path program 14 times [2022-03-01 17:49:26,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:26,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992329309] [2022-03-01 17:49:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:26,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:26,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:26,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992329309] [2022-03-01 17:49:26,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992329309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:26,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207265462] [2022-03-01 17:49:26,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:26,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:26,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:26,332 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) [2022-03-01 17:49:26,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-01 17:49:26,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:26,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:26,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:26,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:26,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:26,485 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 21 treesize of output 37 [2022-03-01 17:49:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:26,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:27,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:27,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:27,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:27,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:27,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207265462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:27,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:27,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:49:27,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719696029] [2022-03-01 17:49:27,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:27,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:49:27,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:27,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:49:27,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:49:27,093 INFO L87 Difference]: Start difference. First operand 3470 states and 14626 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:27,948 INFO L93 Difference]: Finished difference Result 4233 states and 17560 transitions. [2022-03-01 17:49:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:49:27,948 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:27,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:27,993 INFO L225 Difference]: With dead ends: 4233 [2022-03-01 17:49:27,993 INFO L226 Difference]: Without dead ends: 4187 [2022-03-01 17:49:27,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:49:27,993 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 254 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:27,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 556 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1260 Invalid, 0 Unknown, 118 Unchecked, 0.5s Time] [2022-03-01 17:49:27,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4187 states. [2022-03-01 17:49:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4187 to 3470. [2022-03-01 17:49:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 3469 states have (on average 4.216200634188527) internal successors, (14626), 3469 states have internal predecessors, (14626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 14626 transitions. [2022-03-01 17:49:28,045 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 14626 transitions. Word has length 23 [2022-03-01 17:49:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:28,045 INFO L470 AbstractCegarLoop]: Abstraction has 3470 states and 14626 transitions. [2022-03-01 17:49:28,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 14626 transitions. [2022-03-01 17:49:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:28,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:28,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:28,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:28,251 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,SelfDestructingSolverStorable95 [2022-03-01 17:49:28,252 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:28,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:28,252 INFO L85 PathProgramCache]: Analyzing trace with hash -865529710, now seen corresponding path program 15 times [2022-03-01 17:49:28,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:28,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089178536] [2022-03-01 17:49:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:28,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:28,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:28,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089178536] [2022-03-01 17:49:28,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089178536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:28,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166678811] [2022-03-01 17:49:28,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:28,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:28,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:28,412 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) [2022-03-01 17:49:28,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-01 17:49:28,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:49:28,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:28,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:49:28,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:28,681 INFO L353 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2022-03-01 17:49:28,681 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 72 [2022-03-01 17:49:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:28,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:28,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166678811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:28,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:28,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-03-01 17:49:28,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536506876] [2022-03-01 17:49:28,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:28,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:49:28,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:28,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:49:28,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:49:28,992 INFO L87 Difference]: Start difference. First operand 3470 states and 14626 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:31,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:31,226 INFO L93 Difference]: Finished difference Result 5170 states and 21382 transitions. [2022-03-01 17:49:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:49:31,227 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:31,239 INFO L225 Difference]: With dead ends: 5170 [2022-03-01 17:49:31,239 INFO L226 Difference]: Without dead ends: 5115 [2022-03-01 17:49:31,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=516, Invalid=3774, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 17:49:31,240 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 461 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 2603 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:31,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 945 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2603 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 17:49:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5115 states. [2022-03-01 17:49:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5115 to 3518. [2022-03-01 17:49:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 3517 states have (on average 4.223485925504692) internal successors, (14854), 3517 states have internal predecessors, (14854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:31,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 14854 transitions. [2022-03-01 17:49:31,310 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 14854 transitions. Word has length 23 [2022-03-01 17:49:31,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:31,310 INFO L470 AbstractCegarLoop]: Abstraction has 3518 states and 14854 transitions. [2022-03-01 17:49:31,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:31,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 14854 transitions. [2022-03-01 17:49:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:31,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:31,316 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:31,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-01 17:49:31,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:31,517 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:31,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:31,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1030738572, now seen corresponding path program 16 times [2022-03-01 17:49:31,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:31,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90929880] [2022-03-01 17:49:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:31,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:31,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:31,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90929880] [2022-03-01 17:49:31,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90929880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:31,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172410660] [2022-03-01 17:49:31,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:31,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:31,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:31,667 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) [2022-03-01 17:49:31,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-01 17:49:31,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:31,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:31,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:31,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:31,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:31,845 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 22 treesize of output 38 [2022-03-01 17:49:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:32,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:32,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:32,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:32,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:32,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:32,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172410660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:32,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:32,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:49:32,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725167094] [2022-03-01 17:49:32,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:32,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:49:32,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:32,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:49:32,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:49:32,386 INFO L87 Difference]: Start difference. First operand 3518 states and 14854 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:33,499 INFO L93 Difference]: Finished difference Result 4354 states and 18116 transitions. [2022-03-01 17:49:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:49:33,499 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:33,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:33,509 INFO L225 Difference]: With dead ends: 4354 [2022-03-01 17:49:33,509 INFO L226 Difference]: Without dead ends: 4323 [2022-03-01 17:49:33,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=1528, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:49:33,510 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 206 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:33,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 662 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1750 Invalid, 0 Unknown, 142 Unchecked, 0.7s Time] [2022-03-01 17:49:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4323 states. [2022-03-01 17:49:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4323 to 3543. [2022-03-01 17:49:33,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 4.230378317334839) internal successors, (14984), 3542 states have internal predecessors, (14984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:33,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 14984 transitions. [2022-03-01 17:49:33,569 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 14984 transitions. Word has length 23 [2022-03-01 17:49:33,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:33,569 INFO L470 AbstractCegarLoop]: Abstraction has 3543 states and 14984 transitions. [2022-03-01 17:49:33,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:33,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 14984 transitions. [2022-03-01 17:49:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:33,575 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:33,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:33,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-01 17:49:33,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:33,779 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:33,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:33,780 INFO L85 PathProgramCache]: Analyzing trace with hash -442993250, now seen corresponding path program 17 times [2022-03-01 17:49:33,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:33,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592539330] [2022-03-01 17:49:33,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:33,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:33,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:33,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592539330] [2022-03-01 17:49:33,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592539330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:33,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226199031] [2022-03-01 17:49:33,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:33,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:33,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:33,920 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) [2022-03-01 17:49:33,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-01 17:49:33,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:49:33,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:33,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:33,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:34,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:34,085 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 21 treesize of output 37 [2022-03-01 17:49:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:34,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:34,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:34,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:34,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:34,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226199031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:34,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:34,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:49:34,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38273829] [2022-03-01 17:49:34,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:34,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:49:34,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:34,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:49:34,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:49:34,598 INFO L87 Difference]: Start difference. First operand 3543 states and 14984 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:35,648 INFO L93 Difference]: Finished difference Result 4174 states and 17432 transitions. [2022-03-01 17:49:35,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:49:35,649 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:35,659 INFO L225 Difference]: With dead ends: 4174 [2022-03-01 17:49:35,659 INFO L226 Difference]: Without dead ends: 4146 [2022-03-01 17:49:35,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:49:35,660 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 247 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:35,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 507 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1299 Invalid, 0 Unknown, 239 Unchecked, 0.5s Time] [2022-03-01 17:49:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2022-03-01 17:49:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 3549. [2022-03-01 17:49:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3549 states, 3548 states have (on average 4.229988726042841) internal successors, (15008), 3548 states have internal predecessors, (15008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3549 states to 3549 states and 15008 transitions. [2022-03-01 17:49:35,718 INFO L78 Accepts]: Start accepts. Automaton has 3549 states and 15008 transitions. Word has length 23 [2022-03-01 17:49:35,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:35,718 INFO L470 AbstractCegarLoop]: Abstraction has 3549 states and 15008 transitions. [2022-03-01 17:49:35,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:35,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3549 states and 15008 transitions. [2022-03-01 17:49:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:35,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:35,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:35,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-01 17:49:35,938 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,SelfDestructingSolverStorable98 [2022-03-01 17:49:35,938 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:35,939 INFO L85 PathProgramCache]: Analyzing trace with hash 632717906, now seen corresponding path program 18 times [2022-03-01 17:49:35,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:35,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857533060] [2022-03-01 17:49:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:35,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:36,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:36,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857533060] [2022-03-01 17:49:36,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857533060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:36,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291992920] [2022-03-01 17:49:36,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:36,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:36,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:36,081 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) [2022-03-01 17:49:36,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-01 17:49:36,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:49:36,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:36,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:36,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:36,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:36,232 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 21 treesize of output 37 [2022-03-01 17:49:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:36,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:36,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:36,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:36,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:36,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:36,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291992920] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:36,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:36,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:49:36,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566529201] [2022-03-01 17:49:36,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:36,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:49:36,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:36,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:49:36,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:49:36,799 INFO L87 Difference]: Start difference. First operand 3549 states and 15008 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:37,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:37,670 INFO L93 Difference]: Finished difference Result 4175 states and 17437 transitions. [2022-03-01 17:49:37,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:49:37,670 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:37,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:37,679 INFO L225 Difference]: With dead ends: 4175 [2022-03-01 17:49:37,679 INFO L226 Difference]: Without dead ends: 4152 [2022-03-01 17:49:37,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:49:37,680 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 196 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:37,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 484 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1267 Invalid, 0 Unknown, 134 Unchecked, 0.5s Time] [2022-03-01 17:49:37,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4152 states. [2022-03-01 17:49:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4152 to 3541. [2022-03-01 17:49:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 3540 states have (on average 4.231073446327684) internal successors, (14978), 3540 states have internal predecessors, (14978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 14978 transitions. [2022-03-01 17:49:37,752 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 14978 transitions. Word has length 23 [2022-03-01 17:49:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:37,752 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 14978 transitions. [2022-03-01 17:49:37,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 14978 transitions. [2022-03-01 17:49:37,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:37,758 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:37,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:37,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-01 17:49:37,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:37,959 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:37,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1039608366, now seen corresponding path program 19 times [2022-03-01 17:49:37,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:37,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556363146] [2022-03-01 17:49:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:37,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:38,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:38,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556363146] [2022-03-01 17:49:38,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556363146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:38,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675827485] [2022-03-01 17:49:38,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:38,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:38,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:38,095 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) [2022-03-01 17:49:38,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-01 17:49:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:38,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:38,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:38,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:38,274 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 22 treesize of output 38 [2022-03-01 17:49:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:38,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:38,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:38,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:38,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:38,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675827485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:38,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:38,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:49:38,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693566389] [2022-03-01 17:49:38,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:38,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:49:38,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:38,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:49:38,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:49:38,791 INFO L87 Difference]: Start difference. First operand 3541 states and 14978 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:39,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:39,438 INFO L93 Difference]: Finished difference Result 4031 states and 16878 transitions. [2022-03-01 17:49:39,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:49:39,438 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:39,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:39,447 INFO L225 Difference]: With dead ends: 4031 [2022-03-01 17:49:39,447 INFO L226 Difference]: Without dead ends: 3997 [2022-03-01 17:49:39,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:49:39,448 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 165 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:39,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 414 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1077 Invalid, 0 Unknown, 161 Unchecked, 0.4s Time] [2022-03-01 17:49:39,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3997 states. [2022-03-01 17:49:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3997 to 3562. [2022-03-01 17:49:39,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 3561 states have (on average 4.229429935411401) internal successors, (15061), 3561 states have internal predecessors, (15061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:39,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 15061 transitions. [2022-03-01 17:49:39,524 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 15061 transitions. Word has length 23 [2022-03-01 17:49:39,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:39,524 INFO L470 AbstractCegarLoop]: Abstraction has 3562 states and 15061 transitions. [2022-03-01 17:49:39,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:39,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 15061 transitions. [2022-03-01 17:49:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:39,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:39,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:39,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:39,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:39,731 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:39,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:39,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1926661510, now seen corresponding path program 20 times [2022-03-01 17:49:39,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:39,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535837474] [2022-03-01 17:49:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:39,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:39,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:39,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535837474] [2022-03-01 17:49:39,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535837474] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:39,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273462658] [2022-03-01 17:49:39,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:39,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:39,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:39,866 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) [2022-03-01 17:49:39,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-01 17:49:39,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:39,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:39,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:40,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:40,053 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 23 treesize of output 39 [2022-03-01 17:49:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:40,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:40,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:40,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:40,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:40,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:40,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273462658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:40,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:40,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:49:40,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387403727] [2022-03-01 17:49:40,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:40,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:49:40,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:40,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:49:40,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:49:40,551 INFO L87 Difference]: Start difference. First operand 3562 states and 15061 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:41,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:41,597 INFO L93 Difference]: Finished difference Result 4390 states and 18286 transitions. [2022-03-01 17:49:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:49:41,597 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:41,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:41,607 INFO L225 Difference]: With dead ends: 4390 [2022-03-01 17:49:41,607 INFO L226 Difference]: Without dead ends: 4359 [2022-03-01 17:49:41,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=1790, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:49:41,607 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 242 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:41,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 614 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1486 Invalid, 0 Unknown, 230 Unchecked, 0.6s Time] [2022-03-01 17:49:41,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2022-03-01 17:49:41,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 3568. [2022-03-01 17:49:41,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3568 states, 3567 states have (on average 4.230165405102327) internal successors, (15089), 3567 states have internal predecessors, (15089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3568 states to 3568 states and 15089 transitions. [2022-03-01 17:49:41,667 INFO L78 Accepts]: Start accepts. Automaton has 3568 states and 15089 transitions. Word has length 23 [2022-03-01 17:49:41,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:41,667 INFO L470 AbstractCegarLoop]: Abstraction has 3568 states and 15089 transitions. [2022-03-01 17:49:41,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:41,667 INFO L276 IsEmpty]: Start isEmpty. Operand 3568 states and 15089 transitions. [2022-03-01 17:49:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:41,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:41,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:41,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:41,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-01 17:49:41,874 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:41,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:41,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1780560464, now seen corresponding path program 21 times [2022-03-01 17:49:41,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:41,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142374976] [2022-03-01 17:49:41,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:41,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:42,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:42,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142374976] [2022-03-01 17:49:42,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142374976] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:42,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563448186] [2022-03-01 17:49:42,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:42,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:42,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:42,017 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) [2022-03-01 17:49:42,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-01 17:49:42,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:49:42,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:42,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:42,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:42,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:42,183 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 25 treesize of output 41 [2022-03-01 17:49:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:42,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:42,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:42,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:42,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:42,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:42,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563448186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:42,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:42,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:49:42,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709020283] [2022-03-01 17:49:42,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:42,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:49:42,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:42,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:49:42,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:49:42,727 INFO L87 Difference]: Start difference. First operand 3568 states and 15089 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:43,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:43,808 INFO L93 Difference]: Finished difference Result 4105 states and 17160 transitions. [2022-03-01 17:49:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:49:43,808 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:49:43,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:43,817 INFO L225 Difference]: With dead ends: 4105 [2022-03-01 17:49:43,817 INFO L226 Difference]: Without dead ends: 4077 [2022-03-01 17:49:43,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=1730, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:49:43,818 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 232 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:43,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 469 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1116 Invalid, 0 Unknown, 173 Unchecked, 0.5s Time] [2022-03-01 17:49:43,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4077 states. [2022-03-01 17:49:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4077 to 3574. [2022-03-01 17:49:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3574 states, 3573 states have (on average 4.229778897285194) internal successors, (15113), 3573 states have internal predecessors, (15113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3574 states to 3574 states and 15113 transitions. [2022-03-01 17:49:43,874 INFO L78 Accepts]: Start accepts. Automaton has 3574 states and 15113 transitions. Word has length 23 [2022-03-01 17:49:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:43,874 INFO L470 AbstractCegarLoop]: Abstraction has 3574 states and 15113 transitions. [2022-03-01 17:49:43,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3574 states and 15113 transitions. [2022-03-01 17:49:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:43,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:43,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:43,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:44,080 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,SelfDestructingSolverStorable102 [2022-03-01 17:49:44,081 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:44,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:44,081 INFO L85 PathProgramCache]: Analyzing trace with hash -704849308, now seen corresponding path program 22 times [2022-03-01 17:49:44,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:44,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094358491] [2022-03-01 17:49:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:44,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:44,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:44,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094358491] [2022-03-01 17:49:44,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094358491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:44,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647185743] [2022-03-01 17:49:44,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:44,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:44,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:44,240 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) [2022-03-01 17:49:44,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-01 17:49:44,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:44,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:44,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:44,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:44,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:44,409 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 25 treesize of output 41 [2022-03-01 17:49:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:44,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:44,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:44,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:44,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:44,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:45,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647185743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:45,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:45,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:49:45,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184759709] [2022-03-01 17:49:45,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:45,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:49:45,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:45,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:49:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:49:45,002 INFO L87 Difference]: Start difference. First operand 3574 states and 15113 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:45,895 INFO L93 Difference]: Finished difference Result 4136 states and 17284 transitions. [2022-03-01 17:49:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:49:45,896 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:49:45,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:45,905 INFO L225 Difference]: With dead ends: 4136 [2022-03-01 17:49:45,905 INFO L226 Difference]: Without dead ends: 4113 [2022-03-01 17:49:45,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=1306, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:49:45,906 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 217 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:45,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 435 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1100 Invalid, 0 Unknown, 145 Unchecked, 0.5s Time] [2022-03-01 17:49:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2022-03-01 17:49:45,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 3562. [2022-03-01 17:49:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 3561 states have (on average 4.229429935411401) internal successors, (15061), 3561 states have internal predecessors, (15061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 15061 transitions. [2022-03-01 17:49:45,966 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 15061 transitions. Word has length 23 [2022-03-01 17:49:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:45,966 INFO L470 AbstractCegarLoop]: Abstraction has 3562 states and 15061 transitions. [2022-03-01 17:49:45,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 15061 transitions. [2022-03-01 17:49:45,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:45,972 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:45,972 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:45,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-01 17:49:46,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-01 17:49:46,173 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:46,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:46,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1991295016, now seen corresponding path program 23 times [2022-03-01 17:49:46,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:46,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433731231] [2022-03-01 17:49:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:46,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:46,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:46,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433731231] [2022-03-01 17:49:46,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433731231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:46,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823058134] [2022-03-01 17:49:46,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:46,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:46,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:46,331 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) [2022-03-01 17:49:46,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-01 17:49:46,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:49:46,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:46,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:46,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:46,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:46,506 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 22 treesize of output 38 [2022-03-01 17:49:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:46,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:46,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:46,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:46,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:46,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:47,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823058134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:47,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:47,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:49:47,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893971445] [2022-03-01 17:49:47,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:47,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:49:47,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:47,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:49:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:49:47,016 INFO L87 Difference]: Start difference. First operand 3562 states and 15061 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:47,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:47,908 INFO L93 Difference]: Finished difference Result 4178 states and 17419 transitions. [2022-03-01 17:49:47,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:49:47,909 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:47,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:47,918 INFO L225 Difference]: With dead ends: 4178 [2022-03-01 17:49:47,919 INFO L226 Difference]: Without dead ends: 4147 [2022-03-01 17:49:47,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:49:47,919 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 192 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:47,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 638 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1568 Invalid, 0 Unknown, 220 Unchecked, 0.6s Time] [2022-03-01 17:49:47,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2022-03-01 17:49:47,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 3550. [2022-03-01 17:49:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3550 states, 3549 states have (on average 4.227106227106227) internal successors, (15002), 3549 states have internal predecessors, (15002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 15002 transitions. [2022-03-01 17:49:47,980 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 15002 transitions. Word has length 23 [2022-03-01 17:49:47,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:47,980 INFO L470 AbstractCegarLoop]: Abstraction has 3550 states and 15002 transitions. [2022-03-01 17:49:47,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 15002 transitions. [2022-03-01 17:49:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:47,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:47,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:48,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:48,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:48,187 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:48,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:48,187 INFO L85 PathProgramCache]: Analyzing trace with hash 44075248, now seen corresponding path program 24 times [2022-03-01 17:49:48,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:48,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102697862] [2022-03-01 17:49:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:48,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:48,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:48,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102697862] [2022-03-01 17:49:48,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102697862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:48,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820354832] [2022-03-01 17:49:48,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:48,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:48,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:48,315 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) [2022-03-01 17:49:48,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-01 17:49:48,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:49:48,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:48,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 17:49:48,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:48,524 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 22 treesize of output 14 [2022-03-01 17:49:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:48,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:48,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:48,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:48,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:48,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:48,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820354832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:48,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:48,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 21 [2022-03-01 17:49:48,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620770934] [2022-03-01 17:49:48,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:48,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:49:48,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:49:48,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:49:48,777 INFO L87 Difference]: Start difference. First operand 3550 states and 15002 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:50,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:50,280 INFO L93 Difference]: Finished difference Result 5888 states and 24246 transitions. [2022-03-01 17:49:50,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:49:50,281 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:50,295 INFO L225 Difference]: With dead ends: 5888 [2022-03-01 17:49:50,295 INFO L226 Difference]: Without dead ends: 5837 [2022-03-01 17:49:50,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=526, Invalid=2444, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 17:49:50,296 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 279 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:50,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 593 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1585 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:49:50,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5837 states. [2022-03-01 17:49:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5837 to 3604. [2022-03-01 17:49:50,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3603 states have (on average 4.237024701637524) internal successors, (15266), 3603 states have internal predecessors, (15266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 15266 transitions. [2022-03-01 17:49:50,373 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 15266 transitions. Word has length 23 [2022-03-01 17:49:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:50,373 INFO L470 AbstractCegarLoop]: Abstraction has 3604 states and 15266 transitions. [2022-03-01 17:49:50,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:50,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 15266 transitions. [2022-03-01 17:49:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:50,381 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:50,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:50,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:50,581 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,SelfDestructingSolverStorable105 [2022-03-01 17:49:50,581 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:50,582 INFO L85 PathProgramCache]: Analyzing trace with hash -862085712, now seen corresponding path program 25 times [2022-03-01 17:49:50,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:50,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954690798] [2022-03-01 17:49:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:50,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:50,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:50,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954690798] [2022-03-01 17:49:50,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954690798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:50,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030984648] [2022-03-01 17:49:50,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:50,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:50,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:50,732 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) [2022-03-01 17:49:50,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-01 17:49:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:50,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:50,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:50,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:50,919 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 21 treesize of output 37 [2022-03-01 17:49:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:51,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:51,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:51,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:51,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:51,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:51,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030984648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:51,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:51,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:49:51,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164181203] [2022-03-01 17:49:51,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:51,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:49:51,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:51,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:49:51,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:49:51,452 INFO L87 Difference]: Start difference. First operand 3604 states and 15266 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:52,392 INFO L93 Difference]: Finished difference Result 4166 states and 17414 transitions. [2022-03-01 17:49:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:49:52,392 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:52,402 INFO L225 Difference]: With dead ends: 4166 [2022-03-01 17:49:52,403 INFO L226 Difference]: Without dead ends: 4119 [2022-03-01 17:49:52,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=1592, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:49:52,403 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 238 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:52,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 427 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1031 Invalid, 0 Unknown, 114 Unchecked, 0.4s Time] [2022-03-01 17:49:52,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2022-03-01 17:49:52,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 3622. [2022-03-01 17:49:52,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3621 states have (on average 4.2366749516708095) internal successors, (15341), 3621 states have internal predecessors, (15341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 15341 transitions. [2022-03-01 17:49:52,495 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 15341 transitions. Word has length 23 [2022-03-01 17:49:52,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:52,495 INFO L470 AbstractCegarLoop]: Abstraction has 3622 states and 15341 transitions. [2022-03-01 17:49:52,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 15341 transitions. [2022-03-01 17:49:52,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:52,501 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:52,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:52,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:52,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-01 17:49:52,701 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:52,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:52,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1284622172, now seen corresponding path program 26 times [2022-03-01 17:49:52,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:52,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457344857] [2022-03-01 17:49:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:52,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:52,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:52,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457344857] [2022-03-01 17:49:52,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457344857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:52,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574266743] [2022-03-01 17:49:52,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:52,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:52,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:52,836 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) [2022-03-01 17:49:52,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-01 17:49:52,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:52,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:52,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:53,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:53,018 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 22 treesize of output 38 [2022-03-01 17:49:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:53,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:54,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:54,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:54,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:54,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:54,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574266743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:54,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:54,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:49:54,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011893867] [2022-03-01 17:49:54,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:54,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:49:54,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:54,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:49:54,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:49:54,130 INFO L87 Difference]: Start difference. First operand 3622 states and 15341 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:54,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:54,595 INFO L93 Difference]: Finished difference Result 3977 states and 16703 transitions. [2022-03-01 17:49:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:49:54,596 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:54,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:54,605 INFO L225 Difference]: With dead ends: 3977 [2022-03-01 17:49:54,605 INFO L226 Difference]: Without dead ends: 3952 [2022-03-01 17:49:54,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:49:54,605 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 119 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:54,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 421 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 896 Invalid, 0 Unknown, 103 Unchecked, 0.4s Time] [2022-03-01 17:49:54,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2022-03-01 17:49:54,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3622. [2022-03-01 17:49:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3621 states have (on average 4.2366749516708095) internal successors, (15341), 3621 states have internal predecessors, (15341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 15341 transitions. [2022-03-01 17:49:54,660 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 15341 transitions. Word has length 23 [2022-03-01 17:49:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:54,660 INFO L470 AbstractCegarLoop]: Abstraction has 3622 states and 15341 transitions. [2022-03-01 17:49:54,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:54,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 15341 transitions. [2022-03-01 17:49:54,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:54,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:54,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:54,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-01 17:49:54,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:54,867 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:54,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:54,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1577602254, now seen corresponding path program 16 times [2022-03-01 17:49:54,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:54,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450280546] [2022-03-01 17:49:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:54,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:55,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:55,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450280546] [2022-03-01 17:49:55,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450280546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:55,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493864483] [2022-03-01 17:49:55,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:55,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:55,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:55,041 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) [2022-03-01 17:49:55,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-01 17:49:55,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:55,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:55,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:55,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:55,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:55,248 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 20 treesize of output 36 [2022-03-01 17:49:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:55,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:55,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:55,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:55,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:55,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:55,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493864483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:55,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:55,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:49:55,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772358642] [2022-03-01 17:49:55,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:55,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:49:55,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:55,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:49:55,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:49:55,768 INFO L87 Difference]: Start difference. First operand 3622 states and 15341 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:56,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:56,487 INFO L93 Difference]: Finished difference Result 3864 states and 16264 transitions. [2022-03-01 17:49:56,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:49:56,488 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:49:56,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:56,497 INFO L225 Difference]: With dead ends: 3864 [2022-03-01 17:49:56,497 INFO L226 Difference]: Without dead ends: 3849 [2022-03-01 17:49:56,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:49:56,497 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 123 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:56,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 631 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1359 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2022-03-01 17:49:56,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2022-03-01 17:49:56,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3622. [2022-03-01 17:49:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3621 states have (on average 4.2366749516708095) internal successors, (15341), 3621 states have internal predecessors, (15341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:56,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 15341 transitions. [2022-03-01 17:49:56,555 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 15341 transitions. Word has length 23 [2022-03-01 17:49:56,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:56,556 INFO L470 AbstractCegarLoop]: Abstraction has 3622 states and 15341 transitions. [2022-03-01 17:49:56,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:56,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 15341 transitions. [2022-03-01 17:49:56,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:56,575 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:56,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:56,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:56,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:56,776 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:56,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:56,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1127056206, now seen corresponding path program 17 times [2022-03-01 17:49:56,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:56,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643391655] [2022-03-01 17:49:56,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:56,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:56,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:56,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643391655] [2022-03-01 17:49:56,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643391655] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:56,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87517297] [2022-03-01 17:49:56,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:56,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:56,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:56,949 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) [2022-03-01 17:49:56,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-01 17:49:56,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:49:56,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:56,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:56,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:57,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:57,123 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 21 treesize of output 37 [2022-03-01 17:49:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:57,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:57,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:57,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:49:57,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:57,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:49:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:57,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87517297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:57,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:57,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:49:57,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187828951] [2022-03-01 17:49:57,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:57,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:49:57,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:57,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:49:57,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:49:57,678 INFO L87 Difference]: Start difference. First operand 3622 states and 15341 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:58,279 INFO L93 Difference]: Finished difference Result 3790 states and 15965 transitions. [2022-03-01 17:49:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:49:58,279 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:49:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:58,288 INFO L225 Difference]: With dead ends: 3790 [2022-03-01 17:49:58,288 INFO L226 Difference]: Without dead ends: 3768 [2022-03-01 17:49:58,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:49:58,288 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 105 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:58,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 425 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 834 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2022-03-01 17:49:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2022-03-01 17:49:58,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3626. [2022-03-01 17:49:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.236965517241379) internal successors, (15359), 3625 states have internal predecessors, (15359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15359 transitions. [2022-03-01 17:49:58,343 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15359 transitions. Word has length 23 [2022-03-01 17:49:58,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:58,343 INFO L470 AbstractCegarLoop]: Abstraction has 3626 states and 15359 transitions. [2022-03-01 17:49:58,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:58,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15359 transitions. [2022-03-01 17:49:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:49:58,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:58,363 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:49:58,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-01 17:49:58,563 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,SelfDestructingSolverStorable109 [2022-03-01 17:49:58,563 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:49:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:58,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1557952640, now seen corresponding path program 18 times [2022-03-01 17:49:58,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:58,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747672695] [2022-03-01 17:49:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:58,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:58,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:58,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747672695] [2022-03-01 17:49:58,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747672695] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:58,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240848863] [2022-03-01 17:49:58,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:58,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:58,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:58,759 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) [2022-03-01 17:49:58,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-01 17:49:58,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:49:58,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:58,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 17:49:58,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:58,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:58,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:58,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:58,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:58,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-03-01 17:49:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:59,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:59,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:59,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:49:59,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:59,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:59,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-03-01 17:49:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:59,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240848863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:59,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:59,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:49:59,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763585534] [2022-03-01 17:49:59,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:59,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:49:59,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:59,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:49:59,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:49:59,331 INFO L87 Difference]: Start difference. First operand 3626 states and 15359 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:01,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:01,032 INFO L93 Difference]: Finished difference Result 6501 states and 26912 transitions. [2022-03-01 17:50:01,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-01 17:50:01,033 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:01,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:01,048 INFO L225 Difference]: With dead ends: 6501 [2022-03-01 17:50:01,048 INFO L226 Difference]: Without dead ends: 6463 [2022-03-01 17:50:01,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=583, Invalid=2279, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:50:01,049 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 452 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:01,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 606 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1359 Invalid, 0 Unknown, 146 Unchecked, 0.7s Time] [2022-03-01 17:50:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6463 states. [2022-03-01 17:50:01,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6463 to 3806. [2022-03-01 17:50:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3806 states, 3805 states have (on average 4.260709592641262) internal successors, (16212), 3805 states have internal predecessors, (16212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3806 states to 3806 states and 16212 transitions. [2022-03-01 17:50:01,123 INFO L78 Accepts]: Start accepts. Automaton has 3806 states and 16212 transitions. Word has length 23 [2022-03-01 17:50:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:01,123 INFO L470 AbstractCegarLoop]: Abstraction has 3806 states and 16212 transitions. [2022-03-01 17:50:01,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:01,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3806 states and 16212 transitions. [2022-03-01 17:50:01,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:01,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:01,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:01,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-01 17:50:01,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:01,330 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:01,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:01,330 INFO L85 PathProgramCache]: Analyzing trace with hash -894016338, now seen corresponding path program 19 times [2022-03-01 17:50:01,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:01,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933613144] [2022-03-01 17:50:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:01,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:01,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:01,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933613144] [2022-03-01 17:50:01,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933613144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:01,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111623930] [2022-03-01 17:50:01,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:50:01,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:01,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:01,483 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) [2022-03-01 17:50:01,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-01 17:50:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:01,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:01,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:01,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:01,679 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 24 treesize of output 40 [2022-03-01 17:50:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:03,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:04,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:04,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:04,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:04,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:04,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111623930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:04,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:04,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:50:04,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674374303] [2022-03-01 17:50:04,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:04,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:50:04,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:04,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:50:04,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=560, Unknown=1, NotChecked=0, Total=650 [2022-03-01 17:50:04,204 INFO L87 Difference]: Start difference. First operand 3806 states and 16212 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:04,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:04,823 INFO L93 Difference]: Finished difference Result 4040 states and 17107 transitions. [2022-03-01 17:50:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:50:04,823 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:04,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:04,832 INFO L225 Difference]: With dead ends: 4040 [2022-03-01 17:50:04,832 INFO L226 Difference]: Without dead ends: 4025 [2022-03-01 17:50:04,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=142, Invalid=913, Unknown=1, NotChecked=0, Total=1056 [2022-03-01 17:50:04,832 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 127 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:04,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 504 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1057 Invalid, 0 Unknown, 88 Unchecked, 0.4s Time] [2022-03-01 17:50:04,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4025 states. [2022-03-01 17:50:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4025 to 3810. [2022-03-01 17:50:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3810 states, 3809 states have (on average 4.260960882121291) internal successors, (16230), 3809 states have internal predecessors, (16230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3810 states to 3810 states and 16230 transitions. [2022-03-01 17:50:04,889 INFO L78 Accepts]: Start accepts. Automaton has 3810 states and 16230 transitions. Word has length 23 [2022-03-01 17:50:04,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:04,889 INFO L470 AbstractCegarLoop]: Abstraction has 3810 states and 16230 transitions. [2022-03-01 17:50:04,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:04,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3810 states and 16230 transitions. [2022-03-01 17:50:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:04,896 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:04,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:04,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-01 17:50:05,096 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,SelfDestructingSolverStorable111 [2022-03-01 17:50:05,096 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:05,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:05,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1315950606, now seen corresponding path program 20 times [2022-03-01 17:50:05,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:05,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194822262] [2022-03-01 17:50:05,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:05,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:05,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:05,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194822262] [2022-03-01 17:50:05,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194822262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:05,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486240825] [2022-03-01 17:50:05,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:05,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:05,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:05,251 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) [2022-03-01 17:50:05,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-01 17:50:05,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:05,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:05,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:05,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:05,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:05,439 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 51 [2022-03-01 17:50:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:05,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:05,666 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:05,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:05,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:05,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:05,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486240825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:05,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:05,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:50:05,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087992262] [2022-03-01 17:50:05,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:05,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:50:05,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:05,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:50:05,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:50:05,717 INFO L87 Difference]: Start difference. First operand 3810 states and 16230 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:06,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:06,318 INFO L93 Difference]: Finished difference Result 4069 states and 17218 transitions. [2022-03-01 17:50:06,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:50:06,318 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:06,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:06,327 INFO L225 Difference]: With dead ends: 4069 [2022-03-01 17:50:06,328 INFO L226 Difference]: Without dead ends: 4054 [2022-03-01 17:50:06,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:50:06,328 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 163 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:06,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 483 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 984 Invalid, 0 Unknown, 232 Unchecked, 0.4s Time] [2022-03-01 17:50:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2022-03-01 17:50:06,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 3818. [2022-03-01 17:50:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3818 states, 3817 states have (on average 4.2609379093528945) internal successors, (16264), 3817 states have internal predecessors, (16264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3818 states to 3818 states and 16264 transitions. [2022-03-01 17:50:06,382 INFO L78 Accepts]: Start accepts. Automaton has 3818 states and 16264 transitions. Word has length 23 [2022-03-01 17:50:06,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:06,383 INFO L470 AbstractCegarLoop]: Abstraction has 3818 states and 16264 transitions. [2022-03-01 17:50:06,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:06,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3818 states and 16264 transitions. [2022-03-01 17:50:06,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:06,389 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:06,389 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:06,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:06,589 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,SelfDestructingSolverStorable112 [2022-03-01 17:50:06,589 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:06,590 INFO L85 PathProgramCache]: Analyzing trace with hash 2072855730, now seen corresponding path program 21 times [2022-03-01 17:50:06,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:06,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575627088] [2022-03-01 17:50:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:06,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:06,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:06,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575627088] [2022-03-01 17:50:06,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575627088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:06,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059169086] [2022-03-01 17:50:06,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:06,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:06,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:06,741 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) [2022-03-01 17:50:06,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-01 17:50:06,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:50:06,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:06,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:50:06,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:06,882 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:50:06,883 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 30 treesize of output 54 [2022-03-01 17:50:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:07,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:07,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059169086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:07,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:07,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:50:07,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515866617] [2022-03-01 17:50:07,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:07,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:50:07,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:07,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:50:07,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:50:07,178 INFO L87 Difference]: Start difference. First operand 3818 states and 16264 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:08,538 INFO L93 Difference]: Finished difference Result 5037 states and 21038 transitions. [2022-03-01 17:50:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 17:50:08,538 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:08,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:08,550 INFO L225 Difference]: With dead ends: 5037 [2022-03-01 17:50:08,550 INFO L226 Difference]: Without dead ends: 5016 [2022-03-01 17:50:08,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:50:08,550 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 356 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:08,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 488 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:50:08,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5016 states. [2022-03-01 17:50:08,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5016 to 3830. [2022-03-01 17:50:08,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3830 states, 3829 states have (on average 4.262992948550536) internal successors, (16323), 3829 states have internal predecessors, (16323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 16323 transitions. [2022-03-01 17:50:08,615 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 16323 transitions. Word has length 23 [2022-03-01 17:50:08,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:08,615 INFO L470 AbstractCegarLoop]: Abstraction has 3830 states and 16323 transitions. [2022-03-01 17:50:08,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 16323 transitions. [2022-03-01 17:50:08,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:08,622 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:08,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:08,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-01 17:50:08,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:08,822 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1146400410, now seen corresponding path program 22 times [2022-03-01 17:50:08,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:08,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200889900] [2022-03-01 17:50:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:08,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:08,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:08,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200889900] [2022-03-01 17:50:08,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200889900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:08,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342991852] [2022-03-01 17:50:08,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:08,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:08,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:08,975 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) [2022-03-01 17:50:08,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-01 17:50:08,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:08,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:08,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:08,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:09,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:09,148 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 21 treesize of output 37 [2022-03-01 17:50:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:09,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:09,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:09,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:09,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:09,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:09,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342991852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:09,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:09,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:50:09,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453619304] [2022-03-01 17:50:09,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:09,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:50:09,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:09,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:50:09,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:50:09,742 INFO L87 Difference]: Start difference. First operand 3830 states and 16323 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:10,652 INFO L93 Difference]: Finished difference Result 4104 states and 17351 transitions. [2022-03-01 17:50:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:50:10,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:10,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:10,661 INFO L225 Difference]: With dead ends: 4104 [2022-03-01 17:50:10,661 INFO L226 Difference]: Without dead ends: 4089 [2022-03-01 17:50:10,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:50:10,662 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 197 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:10,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 509 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1208 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2022-03-01 17:50:10,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2022-03-01 17:50:10,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3830. [2022-03-01 17:50:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3830 states, 3829 states have (on average 4.262992948550536) internal successors, (16323), 3829 states have internal predecessors, (16323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:10,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 16323 transitions. [2022-03-01 17:50:10,722 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 16323 transitions. Word has length 23 [2022-03-01 17:50:10,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:10,722 INFO L470 AbstractCegarLoop]: Abstraction has 3830 states and 16323 transitions. [2022-03-01 17:50:10,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:10,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 16323 transitions. [2022-03-01 17:50:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:10,728 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:10,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:10,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-01 17:50:10,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-01 17:50:10,931 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:10,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1650319270, now seen corresponding path program 23 times [2022-03-01 17:50:10,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:10,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698938681] [2022-03-01 17:50:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:10,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:11,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:11,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698938681] [2022-03-01 17:50:11,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698938681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:11,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726330837] [2022-03-01 17:50:11,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:50:11,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:11,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:11,096 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) [2022-03-01 17:50:11,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-01 17:50:11,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:50:11,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:11,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:11,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:11,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:11,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:11,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:11,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 49 [2022-03-01 17:50:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:16,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:16,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:16,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-01 17:50:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:16,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726330837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:16,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:16,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:50:16,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147443706] [2022-03-01 17:50:16,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:16,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:50:16,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:16,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:50:16,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:50:16,414 INFO L87 Difference]: Start difference. First operand 3830 states and 16323 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:20,748 INFO L93 Difference]: Finished difference Result 6645 states and 27466 transitions. [2022-03-01 17:50:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 17:50:20,748 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:20,785 INFO L225 Difference]: With dead ends: 6645 [2022-03-01 17:50:20,786 INFO L226 Difference]: Without dead ends: 6615 [2022-03-01 17:50:20,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=582, Invalid=2958, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:50:20,786 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 436 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 762 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:20,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 816 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1447 Invalid, 0 Unknown, 762 Unchecked, 0.7s Time] [2022-03-01 17:50:20,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6615 states. [2022-03-01 17:50:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6615 to 3952. [2022-03-01 17:50:20,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 4.281447734750696) internal successors, (16916), 3951 states have internal predecessors, (16916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 16916 transitions. [2022-03-01 17:50:20,863 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 16916 transitions. Word has length 23 [2022-03-01 17:50:20,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:20,864 INFO L470 AbstractCegarLoop]: Abstraction has 3952 states and 16916 transitions. [2022-03-01 17:50:20,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:20,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 16916 transitions. [2022-03-01 17:50:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:20,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:20,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:20,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:21,103 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,SelfDestructingSolverStorable115 [2022-03-01 17:50:21,103 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:21,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:21,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1104393394, now seen corresponding path program 24 times [2022-03-01 17:50:21,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:21,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320039574] [2022-03-01 17:50:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:21,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:21,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:21,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320039574] [2022-03-01 17:50:21,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320039574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:21,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733592429] [2022-03-01 17:50:21,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:50:21,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:21,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:21,254 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) [2022-03-01 17:50:21,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-01 17:50:21,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:50:21,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:21,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:21,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:21,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:21,450 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 20 treesize of output 36 [2022-03-01 17:50:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:21,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:21,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:21,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:21,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:21,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:21,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733592429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:21,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:21,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:50:21,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086224086] [2022-03-01 17:50:21,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:21,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:50:21,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:21,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:50:21,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:21,982 INFO L87 Difference]: Start difference. First operand 3952 states and 16916 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:22,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:22,789 INFO L93 Difference]: Finished difference Result 4257 states and 18081 transitions. [2022-03-01 17:50:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:50:22,789 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:22,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:22,800 INFO L225 Difference]: With dead ends: 4257 [2022-03-01 17:50:22,800 INFO L226 Difference]: Without dead ends: 4242 [2022-03-01 17:50:22,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:50:22,800 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 132 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:22,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 520 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1339 Invalid, 0 Unknown, 89 Unchecked, 0.6s Time] [2022-03-01 17:50:22,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4242 states. [2022-03-01 17:50:22,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4242 to 3958. [2022-03-01 17:50:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3958 states, 3957 states have (on average 4.2817791256002025) internal successors, (16943), 3957 states have internal predecessors, (16943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:22,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3958 states to 3958 states and 16943 transitions. [2022-03-01 17:50:22,864 INFO L78 Accepts]: Start accepts. Automaton has 3958 states and 16943 transitions. Word has length 23 [2022-03-01 17:50:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:22,865 INFO L470 AbstractCegarLoop]: Abstraction has 3958 states and 16943 transitions. [2022-03-01 17:50:22,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:22,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3958 states and 16943 transitions. [2022-03-01 17:50:22,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:22,873 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:22,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:22,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:23,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:23,081 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:23,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1689727346, now seen corresponding path program 25 times [2022-03-01 17:50:23,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:23,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404417089] [2022-03-01 17:50:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:23,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:23,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:23,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404417089] [2022-03-01 17:50:23,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404417089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:23,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559522260] [2022-03-01 17:50:23,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:50:23,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:23,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:23,248 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) [2022-03-01 17:50:23,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-01 17:50:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:23,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:23,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:23,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:23,418 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 21 treesize of output 37 [2022-03-01 17:50:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:23,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:23,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:23,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:23,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:23,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:23,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559522260] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:23,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:23,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:50:23,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236851169] [2022-03-01 17:50:23,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:23,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:50:23,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:23,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:50:23,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:23,964 INFO L87 Difference]: Start difference. First operand 3958 states and 16943 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:24,980 INFO L93 Difference]: Finished difference Result 4250 states and 18064 transitions. [2022-03-01 17:50:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:50:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:50:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:24,992 INFO L225 Difference]: With dead ends: 4250 [2022-03-01 17:50:24,992 INFO L226 Difference]: Without dead ends: 4228 [2022-03-01 17:50:24,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=1442, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:50:24,992 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 165 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:24,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 428 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1128 Invalid, 0 Unknown, 197 Unchecked, 0.5s Time] [2022-03-01 17:50:24,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4228 states. [2022-03-01 17:50:25,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4228 to 3962. [2022-03-01 17:50:25,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3962 states, 3961 states have (on average 4.281494572077758) internal successors, (16959), 3961 states have internal predecessors, (16959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3962 states to 3962 states and 16959 transitions. [2022-03-01 17:50:25,067 INFO L78 Accepts]: Start accepts. Automaton has 3962 states and 16959 transitions. Word has length 23 [2022-03-01 17:50:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:25,067 INFO L470 AbstractCegarLoop]: Abstraction has 3962 states and 16959 transitions. [2022-03-01 17:50:25,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:25,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3962 states and 16959 transitions. [2022-03-01 17:50:25,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:25,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:25,074 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:25,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-01 17:50:25,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:25,275 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:25,275 INFO L85 PathProgramCache]: Analyzing trace with hash -991673216, now seen corresponding path program 26 times [2022-03-01 17:50:25,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:25,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068156282] [2022-03-01 17:50:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:25,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:25,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:25,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068156282] [2022-03-01 17:50:25,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068156282] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:25,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233139063] [2022-03-01 17:50:25,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:25,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:25,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:25,435 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) [2022-03-01 17:50:25,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-01 17:50:25,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:25,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:25,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:25,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:25,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:25,627 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 21 treesize of output 37 [2022-03-01 17:50:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:26,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:26,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:26,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:26,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:26,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:26,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233139063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:26,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:26,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:50:26,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555150576] [2022-03-01 17:50:26,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:26,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:50:26,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:26,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:50:26,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:26,237 INFO L87 Difference]: Start difference. First operand 3962 states and 16959 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:27,137 INFO L93 Difference]: Finished difference Result 4232 states and 17995 transitions. [2022-03-01 17:50:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:50:27,137 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:50:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:27,147 INFO L225 Difference]: With dead ends: 4232 [2022-03-01 17:50:27,148 INFO L226 Difference]: Without dead ends: 4217 [2022-03-01 17:50:27,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:50:27,148 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 139 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:27,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 417 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1178 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2022-03-01 17:50:27,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4217 states. [2022-03-01 17:50:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4217 to 3962. [2022-03-01 17:50:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3962 states, 3961 states have (on average 4.281494572077758) internal successors, (16959), 3961 states have internal predecessors, (16959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:27,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3962 states to 3962 states and 16959 transitions. [2022-03-01 17:50:27,210 INFO L78 Accepts]: Start accepts. Automaton has 3962 states and 16959 transitions. Word has length 23 [2022-03-01 17:50:27,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:27,210 INFO L470 AbstractCegarLoop]: Abstraction has 3962 states and 16959 transitions. [2022-03-01 17:50:27,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:27,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3962 states and 16959 transitions. [2022-03-01 17:50:27,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:27,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:27,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:27,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-01 17:50:27,416 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,SelfDestructingSolverStorable118 [2022-03-01 17:50:27,416 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:27,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash 877172014, now seen corresponding path program 27 times [2022-03-01 17:50:27,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:27,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906981550] [2022-03-01 17:50:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:27,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:27,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:27,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906981550] [2022-03-01 17:50:27,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906981550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:27,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516473802] [2022-03-01 17:50:27,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:27,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:27,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:27,566 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) [2022-03-01 17:50:27,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-01 17:50:27,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:50:27,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:27,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:27,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:27,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:27,756 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 22 treesize of output 38 [2022-03-01 17:50:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:28,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:28,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:28,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:28,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:28,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:28,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516473802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:28,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:28,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:50:28,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116344963] [2022-03-01 17:50:28,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:28,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:50:28,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:28,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:50:28,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:28,279 INFO L87 Difference]: Start difference. First operand 3962 states and 16959 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:28,982 INFO L93 Difference]: Finished difference Result 4230 states and 17983 transitions. [2022-03-01 17:50:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:50:28,982 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:28,991 INFO L225 Difference]: With dead ends: 4230 [2022-03-01 17:50:28,992 INFO L226 Difference]: Without dead ends: 4215 [2022-03-01 17:50:28,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:50:28,992 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 145 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:28,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 501 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1255 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-03-01 17:50:28,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4215 states. [2022-03-01 17:50:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4215 to 3966. [2022-03-01 17:50:29,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3966 states, 3965 states have (on average 4.28171500630517) internal successors, (16977), 3965 states have internal predecessors, (16977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3966 states to 3966 states and 16977 transitions. [2022-03-01 17:50:29,052 INFO L78 Accepts]: Start accepts. Automaton has 3966 states and 16977 transitions. Word has length 23 [2022-03-01 17:50:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:29,052 INFO L470 AbstractCegarLoop]: Abstraction has 3966 states and 16977 transitions. [2022-03-01 17:50:29,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3966 states and 16977 transitions. [2022-03-01 17:50:29,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:29,059 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:29,059 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:29,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-01 17:50:29,259 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,SelfDestructingSolverStorable119 [2022-03-01 17:50:29,259 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:29,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:29,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1390698866, now seen corresponding path program 28 times [2022-03-01 17:50:29,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:29,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672999382] [2022-03-01 17:50:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:29,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:29,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:29,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672999382] [2022-03-01 17:50:29,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672999382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:29,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699366420] [2022-03-01 17:50:29,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:29,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:29,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:29,412 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) [2022-03-01 17:50:29,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-01 17:50:29,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:29,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:29,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:29,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:29,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:29,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-03-01 17:50:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:29,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:30,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:30,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:30,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:30,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:30,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699366420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:30,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:30,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:50:30,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766130786] [2022-03-01 17:50:30,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:30,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:50:30,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:30,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:50:30,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:50:30,185 INFO L87 Difference]: Start difference. First operand 3966 states and 16977 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:31,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:31,094 INFO L93 Difference]: Finished difference Result 4303 states and 18232 transitions. [2022-03-01 17:50:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:50:31,094 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:31,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:31,105 INFO L225 Difference]: With dead ends: 4303 [2022-03-01 17:50:31,105 INFO L226 Difference]: Without dead ends: 4257 [2022-03-01 17:50:31,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:50:31,106 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 148 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:31,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 471 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1188 Invalid, 0 Unknown, 117 Unchecked, 0.5s Time] [2022-03-01 17:50:31,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4257 states. [2022-03-01 17:50:31,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4257 to 3986. [2022-03-01 17:50:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3986 states, 3985 states have (on average 4.281555834378921) internal successors, (17062), 3985 states have internal predecessors, (17062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3986 states to 3986 states and 17062 transitions. [2022-03-01 17:50:31,170 INFO L78 Accepts]: Start accepts. Automaton has 3986 states and 17062 transitions. Word has length 23 [2022-03-01 17:50:31,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:31,170 INFO L470 AbstractCegarLoop]: Abstraction has 3986 states and 17062 transitions. [2022-03-01 17:50:31,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3986 states and 17062 transitions. [2022-03-01 17:50:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:31,177 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:31,177 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:31,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:31,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:31,378 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:31,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1828557274, now seen corresponding path program 29 times [2022-03-01 17:50:31,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:31,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644312491] [2022-03-01 17:50:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:31,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:31,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:31,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644312491] [2022-03-01 17:50:31,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644312491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:31,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150988606] [2022-03-01 17:50:31,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:50:31,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:31,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:31,582 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) [2022-03-01 17:50:31,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-01 17:50:31,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:50:31,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:31,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:31,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:31,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:31,803 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 25 treesize of output 41 [2022-03-01 17:50:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:32,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:32,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:32,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:32,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:32,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:32,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150988606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:32,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:32,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:50:32,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262364010] [2022-03-01 17:50:32,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:32,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:50:32,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:32,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:50:32,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:50:32,413 INFO L87 Difference]: Start difference. First operand 3986 states and 17062 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:33,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:33,230 INFO L93 Difference]: Finished difference Result 4258 states and 18064 transitions. [2022-03-01 17:50:33,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:50:33,231 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:33,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:33,241 INFO L225 Difference]: With dead ends: 4258 [2022-03-01 17:50:33,241 INFO L226 Difference]: Without dead ends: 4222 [2022-03-01 17:50:33,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:50:33,241 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 139 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:33,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 422 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1144 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-03-01 17:50:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2022-03-01 17:50:33,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 3982. [2022-03-01 17:50:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3982 states, 3981 states have (on average 4.281838733986436) internal successors, (17046), 3981 states have internal predecessors, (17046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:33,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3982 states to 3982 states and 17046 transitions. [2022-03-01 17:50:33,304 INFO L78 Accepts]: Start accepts. Automaton has 3982 states and 17046 transitions. Word has length 23 [2022-03-01 17:50:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:33,304 INFO L470 AbstractCegarLoop]: Abstraction has 3982 states and 17046 transitions. [2022-03-01 17:50:33,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3982 states and 17046 transitions. [2022-03-01 17:50:33,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:33,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:33,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:33,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:33,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:33,526 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:33,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1547561422, now seen corresponding path program 30 times [2022-03-01 17:50:33,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:33,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894082722] [2022-03-01 17:50:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:33,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:33,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:33,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894082722] [2022-03-01 17:50:33,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894082722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:33,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73143557] [2022-03-01 17:50:33,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:50:33,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:33,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:33,690 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:33,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-01 17:50:33,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:50:33,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:33,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:33,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:33,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:33,847 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 21 treesize of output 37 [2022-03-01 17:50:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:34,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:34,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:34,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:34,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:34,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:34,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73143557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:34,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:34,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:50:34,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363408446] [2022-03-01 17:50:34,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:34,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:50:34,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:34,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:50:34,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:34,450 INFO L87 Difference]: Start difference. First operand 3982 states and 17046 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:35,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:35,339 INFO L93 Difference]: Finished difference Result 4358 states and 18501 transitions. [2022-03-01 17:50:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:50:35,339 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:35,350 INFO L225 Difference]: With dead ends: 4358 [2022-03-01 17:50:35,350 INFO L226 Difference]: Without dead ends: 4336 [2022-03-01 17:50:35,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:50:35,351 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 184 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:35,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 305 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 820 Invalid, 0 Unknown, 108 Unchecked, 0.4s Time] [2022-03-01 17:50:35,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2022-03-01 17:50:35,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 3991. [2022-03-01 17:50:35,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3991 states, 3990 states have (on average 4.280200501253133) internal successors, (17078), 3990 states have internal predecessors, (17078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3991 states to 3991 states and 17078 transitions. [2022-03-01 17:50:35,432 INFO L78 Accepts]: Start accepts. Automaton has 3991 states and 17078 transitions. Word has length 23 [2022-03-01 17:50:35,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:35,432 INFO L470 AbstractCegarLoop]: Abstraction has 3991 states and 17078 transitions. [2022-03-01 17:50:35,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3991 states and 17078 transitions. [2022-03-01 17:50:35,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:35,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:35,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:35,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:35,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:35,640 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:35,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:35,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1705829806, now seen corresponding path program 31 times [2022-03-01 17:50:35,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:35,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678937211] [2022-03-01 17:50:35,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:35,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:35,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:35,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678937211] [2022-03-01 17:50:35,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678937211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:35,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848372237] [2022-03-01 17:50:35,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:50:35,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:35,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:35,831 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:35,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-01 17:50:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:35,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:35,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:35,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:35,982 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 21 treesize of output 37 [2022-03-01 17:50:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:36,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:36,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:36,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:36,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:36,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:36,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848372237] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:36,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:36,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:50:36,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043967412] [2022-03-01 17:50:36,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:36,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:50:36,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:50:36,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:36,662 INFO L87 Difference]: Start difference. First operand 3991 states and 17078 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:37,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:37,436 INFO L93 Difference]: Finished difference Result 4322 states and 18353 transitions. [2022-03-01 17:50:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:50:37,437 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:37,446 INFO L225 Difference]: With dead ends: 4322 [2022-03-01 17:50:37,446 INFO L226 Difference]: Without dead ends: 4298 [2022-03-01 17:50:37,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:50:37,447 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 139 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:37,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 340 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 866 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2022-03-01 17:50:37,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2022-03-01 17:50:37,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 3988. [2022-03-01 17:50:37,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3987 states have (on average 4.281414597441685) internal successors, (17070), 3987 states have internal predecessors, (17070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:37,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 17070 transitions. [2022-03-01 17:50:37,507 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 17070 transitions. Word has length 23 [2022-03-01 17:50:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:37,507 INFO L470 AbstractCegarLoop]: Abstraction has 3988 states and 17070 transitions. [2022-03-01 17:50:37,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:37,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 17070 transitions. [2022-03-01 17:50:37,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:37,513 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:37,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:37,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:37,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-01 17:50:37,714 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:37,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:37,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1418708454, now seen corresponding path program 32 times [2022-03-01 17:50:37,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:37,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671170557] [2022-03-01 17:50:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:37,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:37,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:37,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671170557] [2022-03-01 17:50:37,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671170557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:37,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004830398] [2022-03-01 17:50:37,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:37,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:37,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:37,888 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:37,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-01 17:50:37,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:37,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:37,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:37,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:38,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:38,042 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 21 treesize of output 37 [2022-03-01 17:50:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:38,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:38,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:38,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:38,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:38,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:38,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004830398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:38,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:38,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:50:38,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792643509] [2022-03-01 17:50:38,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:38,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:50:38,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:38,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:50:38,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:38,651 INFO L87 Difference]: Start difference. First operand 3988 states and 17070 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:39,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:39,520 INFO L93 Difference]: Finished difference Result 4310 states and 18308 transitions. [2022-03-01 17:50:39,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:50:39,520 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:39,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:39,531 INFO L225 Difference]: With dead ends: 4310 [2022-03-01 17:50:39,531 INFO L226 Difference]: Without dead ends: 4288 [2022-03-01 17:50:39,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:50:39,532 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 200 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:39,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 318 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 762 Invalid, 0 Unknown, 108 Unchecked, 0.4s Time] [2022-03-01 17:50:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2022-03-01 17:50:39,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 3992. [2022-03-01 17:50:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3992 states, 3991 states have (on average 4.281132548233526) internal successors, (17086), 3991 states have internal predecessors, (17086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 17086 transitions. [2022-03-01 17:50:39,601 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 17086 transitions. Word has length 23 [2022-03-01 17:50:39,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:39,601 INFO L470 AbstractCegarLoop]: Abstraction has 3992 states and 17086 transitions. [2022-03-01 17:50:39,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 17086 transitions. [2022-03-01 17:50:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:39,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:39,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:39,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:39,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-01 17:50:39,823 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:39,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:39,823 INFO L85 PathProgramCache]: Analyzing trace with hash 925491068, now seen corresponding path program 33 times [2022-03-01 17:50:39,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:39,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644323707] [2022-03-01 17:50:39,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:39,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:39,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:39,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644323707] [2022-03-01 17:50:39,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644323707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:39,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704054244] [2022-03-01 17:50:39,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:39,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:39,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:40,000 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:40,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-01 17:50:40,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:50:40,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:40,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:40,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:40,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:40,183 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:50:40,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2022-03-01 17:50:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:40,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:40,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704054244] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:40,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:40,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:50:40,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002721862] [2022-03-01 17:50:40,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:40,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:50:40,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:40,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:50:40,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:50:40,612 INFO L87 Difference]: Start difference. First operand 3992 states and 17086 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2022-03-01 17:50:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:42,555 INFO L93 Difference]: Finished difference Result 4834 states and 20380 transitions. [2022-03-01 17:50:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 17:50:42,555 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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 23 [2022-03-01 17:50:42,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:42,566 INFO L225 Difference]: With dead ends: 4834 [2022-03-01 17:50:42,566 INFO L226 Difference]: Without dead ends: 4804 [2022-03-01 17:50:42,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=454, Invalid=2738, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 17:50:42,567 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 384 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:42,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 511 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:50:42,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4804 states. [2022-03-01 17:50:42,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4804 to 4000. [2022-03-01 17:50:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4000 states, 3999 states have (on average 4.28132033008252) internal successors, (17121), 3999 states have internal predecessors, (17121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4000 states to 4000 states and 17121 transitions. [2022-03-01 17:50:42,630 INFO L78 Accepts]: Start accepts. Automaton has 4000 states and 17121 transitions. Word has length 23 [2022-03-01 17:50:42,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:42,631 INFO L470 AbstractCegarLoop]: Abstraction has 4000 states and 17121 transitions. [2022-03-01 17:50:42,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2022-03-01 17:50:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4000 states and 17121 transitions. [2022-03-01 17:50:42,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:42,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:42,637 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:42,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:42,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-01 17:50:42,838 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:42,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:42,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1860267324, now seen corresponding path program 34 times [2022-03-01 17:50:42,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:42,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652577489] [2022-03-01 17:50:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:42,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:43,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:43,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652577489] [2022-03-01 17:50:43,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652577489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:43,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804026601] [2022-03-01 17:50:43,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:43,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:43,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:43,010 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:43,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-01 17:50:43,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:43,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:43,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:43,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:43,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:43,161 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 21 treesize of output 37 [2022-03-01 17:50:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:43,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:43,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:43,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:43,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:43,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:43,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804026601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:43,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:43,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:50:43,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469324556] [2022-03-01 17:50:43,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:43,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:50:43,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:43,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:50:43,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:50:43,853 INFO L87 Difference]: Start difference. First operand 4000 states and 17121 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:44,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:44,756 INFO L93 Difference]: Finished difference Result 4377 states and 18532 transitions. [2022-03-01 17:50:44,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:50:44,756 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:44,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:44,766 INFO L225 Difference]: With dead ends: 4377 [2022-03-01 17:50:44,766 INFO L226 Difference]: Without dead ends: 4331 [2022-03-01 17:50:44,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=1198, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:50:44,767 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 152 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:44,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 413 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1022 Invalid, 0 Unknown, 57 Unchecked, 0.5s Time] [2022-03-01 17:50:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2022-03-01 17:50:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 4010. [2022-03-01 17:50:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4010 states, 4009 states have (on average 4.280618608131704) internal successors, (17161), 4009 states have internal predecessors, (17161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4010 states to 4010 states and 17161 transitions. [2022-03-01 17:50:44,843 INFO L78 Accepts]: Start accepts. Automaton has 4010 states and 17161 transitions. Word has length 23 [2022-03-01 17:50:44,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:44,843 INFO L470 AbstractCegarLoop]: Abstraction has 4010 states and 17161 transitions. [2022-03-01 17:50:44,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:44,843 INFO L276 IsEmpty]: Start isEmpty. Operand 4010 states and 17161 transitions. [2022-03-01 17:50:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:44,850 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:44,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:44,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-01 17:50:45,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:45,051 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:45,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:45,052 INFO L85 PathProgramCache]: Analyzing trace with hash 847574792, now seen corresponding path program 35 times [2022-03-01 17:50:45,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:45,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622589224] [2022-03-01 17:50:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:45,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:45,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:45,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622589224] [2022-03-01 17:50:45,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622589224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:45,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502389773] [2022-03-01 17:50:45,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:50:45,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:45,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:45,224 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:45,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-01 17:50:45,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:50:45,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:45,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:45,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:45,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:45,380 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 21 treesize of output 37 [2022-03-01 17:50:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:45,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:45,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:45,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:46,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:46,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:46,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502389773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:46,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:46,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:50:46,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951342573] [2022-03-01 17:50:46,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:46,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:50:46,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:46,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:50:46,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:50:46,047 INFO L87 Difference]: Start difference. First operand 4010 states and 17161 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:46,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:46,817 INFO L93 Difference]: Finished difference Result 4321 states and 18317 transitions. [2022-03-01 17:50:46,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:50:46,818 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:46,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:46,829 INFO L225 Difference]: With dead ends: 4321 [2022-03-01 17:50:46,829 INFO L226 Difference]: Without dead ends: 4285 [2022-03-01 17:50:46,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:50:46,829 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 118 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:46,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 359 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1043 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2022-03-01 17:50:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2022-03-01 17:50:46,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 4002. [2022-03-01 17:50:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4002 states, 4001 states have (on average 4.281179705073732) internal successors, (17129), 4001 states have internal predecessors, (17129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 17129 transitions. [2022-03-01 17:50:46,894 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 17129 transitions. Word has length 23 [2022-03-01 17:50:46,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:46,894 INFO L470 AbstractCegarLoop]: Abstraction has 4002 states and 17129 transitions. [2022-03-01 17:50:46,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 17129 transitions. [2022-03-01 17:50:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:46,901 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:46,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:46,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-01 17:50:47,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:47,115 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:47,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:47,116 INFO L85 PathProgramCache]: Analyzing trace with hash -168540314, now seen corresponding path program 36 times [2022-03-01 17:50:47,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:47,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308590418] [2022-03-01 17:50:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:47,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:47,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:47,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308590418] [2022-03-01 17:50:47,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308590418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:47,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067373943] [2022-03-01 17:50:47,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:50:47,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:47,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:47,277 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:47,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-01 17:50:47,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:50:47,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:47,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:47,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:47,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:47,486 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 26 treesize of output 42 [2022-03-01 17:50:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:47,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:47,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:47,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:47,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:47,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:48,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067373943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:48,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:48,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:50:48,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807525792] [2022-03-01 17:50:48,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:48,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:50:48,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:48,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:50:48,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:48,039 INFO L87 Difference]: Start difference. First operand 4002 states and 17129 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:48,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:48,639 INFO L93 Difference]: Finished difference Result 4239 states and 18031 transitions. [2022-03-01 17:50:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:50:48,640 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:48,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:48,649 INFO L225 Difference]: With dead ends: 4239 [2022-03-01 17:50:48,649 INFO L226 Difference]: Without dead ends: 4224 [2022-03-01 17:50:48,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:50:48,649 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 117 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:48,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 471 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1007 Invalid, 0 Unknown, 113 Unchecked, 0.4s Time] [2022-03-01 17:50:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4224 states. [2022-03-01 17:50:48,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4224 to 4010. [2022-03-01 17:50:48,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4010 states, 4009 states have (on average 4.281117485657271) internal successors, (17163), 4009 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4010 states to 4010 states and 17163 transitions. [2022-03-01 17:50:48,710 INFO L78 Accepts]: Start accepts. Automaton has 4010 states and 17163 transitions. Word has length 23 [2022-03-01 17:50:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:48,710 INFO L470 AbstractCegarLoop]: Abstraction has 4010 states and 17163 transitions. [2022-03-01 17:50:48,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 4010 states and 17163 transitions. [2022-03-01 17:50:48,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:48,716 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:48,716 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:48,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-01 17:50:48,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-01 17:50:48,918 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:48,919 INFO L85 PathProgramCache]: Analyzing trace with hash 416793638, now seen corresponding path program 37 times [2022-03-01 17:50:48,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:48,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692248281] [2022-03-01 17:50:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:48,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:49,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:49,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692248281] [2022-03-01 17:50:49,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692248281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:49,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090338946] [2022-03-01 17:50:49,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:50:49,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:49,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:49,073 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:49,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-01 17:50:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:49,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:49,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:49,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:49,245 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 21 treesize of output 37 [2022-03-01 17:50:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:49,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:49,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:49,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:49,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:49,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:49,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090338946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:49,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:49,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:50:49,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898333211] [2022-03-01 17:50:49,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:49,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:50:49,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:49,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:50:49,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:49,800 INFO L87 Difference]: Start difference. First operand 4010 states and 17163 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:50,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:50,607 INFO L93 Difference]: Finished difference Result 4225 states and 17973 transitions. [2022-03-01 17:50:50,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:50:50,607 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:50:50,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:50,618 INFO L225 Difference]: With dead ends: 4225 [2022-03-01 17:50:50,618 INFO L226 Difference]: Without dead ends: 4203 [2022-03-01 17:50:50,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:50:50,618 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 161 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:50,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 349 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 743 Invalid, 0 Unknown, 148 Unchecked, 0.3s Time] [2022-03-01 17:50:50,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2022-03-01 17:50:50,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 4014. [2022-03-01 17:50:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4014 states, 4013 states have (on average 4.280837278843758) internal successors, (17179), 4013 states have internal predecessors, (17179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 17179 transitions. [2022-03-01 17:50:50,682 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 17179 transitions. Word has length 23 [2022-03-01 17:50:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:50,682 INFO L470 AbstractCegarLoop]: Abstraction has 4014 states and 17179 transitions. [2022-03-01 17:50:50,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 17179 transitions. [2022-03-01 17:50:50,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:50,689 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:50,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:50,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:50,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-01 17:50:50,890 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:50,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2030360372, now seen corresponding path program 38 times [2022-03-01 17:50:50,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:50,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160288859] [2022-03-01 17:50:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:50,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:51,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:51,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160288859] [2022-03-01 17:50:51,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160288859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:51,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251067425] [2022-03-01 17:50:51,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:51,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:51,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:51,046 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:51,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-01 17:50:51,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:51,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:51,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:51,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:51,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:51,219 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 21 treesize of output 37 [2022-03-01 17:50:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:51,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:51,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:51,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:51,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:51,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:51,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251067425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:51,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:51,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:50:51,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309311764] [2022-03-01 17:50:51,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:51,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:50:51,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:51,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:50:51,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:51,811 INFO L87 Difference]: Start difference. First operand 4014 states and 17179 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:52,640 INFO L93 Difference]: Finished difference Result 4259 states and 18108 transitions. [2022-03-01 17:50:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:50:52,640 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:50:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:52,650 INFO L225 Difference]: With dead ends: 4259 [2022-03-01 17:50:52,651 INFO L226 Difference]: Without dead ends: 4244 [2022-03-01 17:50:52,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:50:52,651 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 146 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:52,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 366 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 918 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-03-01 17:50:52,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4244 states. [2022-03-01 17:50:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4244 to 4006. [2022-03-01 17:50:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4006 states, 4005 states have (on average 4.280898876404494) internal successors, (17145), 4005 states have internal predecessors, (17145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:52,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4006 states to 4006 states and 17145 transitions. [2022-03-01 17:50:52,711 INFO L78 Accepts]: Start accepts. Automaton has 4006 states and 17145 transitions. Word has length 23 [2022-03-01 17:50:52,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:52,711 INFO L470 AbstractCegarLoop]: Abstraction has 4006 states and 17145 transitions. [2022-03-01 17:50:52,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 4006 states and 17145 transitions. [2022-03-01 17:50:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:52,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:52,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:52,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-01 17:50:52,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:52,920 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:52,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1704045700, now seen corresponding path program 39 times [2022-03-01 17:50:52,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:52,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361056121] [2022-03-01 17:50:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:52,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:53,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:53,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361056121] [2022-03-01 17:50:53,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361056121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:53,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389784952] [2022-03-01 17:50:53,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:53,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:53,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:53,066 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:53,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-01 17:50:53,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:50:53,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:53,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:53,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:53,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:53,262 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 22 treesize of output 38 [2022-03-01 17:50:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:53,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:53,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:53,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:53,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:53,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:53,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389784952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:53,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:53,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:50:53,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037118844] [2022-03-01 17:50:53,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:53,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:50:53,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:53,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:50:53,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:53,797 INFO L87 Difference]: Start difference. First operand 4006 states and 17145 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:54,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:54,300 INFO L93 Difference]: Finished difference Result 4387 states and 18613 transitions. [2022-03-01 17:50:54,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:50:54,301 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:54,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:54,311 INFO L225 Difference]: With dead ends: 4387 [2022-03-01 17:50:54,311 INFO L226 Difference]: Without dead ends: 4357 [2022-03-01 17:50:54,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:50:54,312 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 114 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:54,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 428 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 771 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-03-01 17:50:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2022-03-01 17:50:54,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 4006. [2022-03-01 17:50:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4006 states, 4005 states have (on average 4.280898876404494) internal successors, (17145), 4005 states have internal predecessors, (17145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4006 states to 4006 states and 17145 transitions. [2022-03-01 17:50:54,372 INFO L78 Accepts]: Start accepts. Automaton has 4006 states and 17145 transitions. Word has length 23 [2022-03-01 17:50:54,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:54,372 INFO L470 AbstractCegarLoop]: Abstraction has 4006 states and 17145 transitions. [2022-03-01 17:50:54,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:54,372 INFO L276 IsEmpty]: Start isEmpty. Operand 4006 states and 17145 transitions. [2022-03-01 17:50:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:54,378 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:54,378 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:54,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-01 17:50:54,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:54,579 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:54,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1032228548, now seen corresponding path program 40 times [2022-03-01 17:50:54,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:54,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40136527] [2022-03-01 17:50:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:54,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:54,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:54,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40136527] [2022-03-01 17:50:54,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40136527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:54,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937511636] [2022-03-01 17:50:54,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:54,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:54,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:54,725 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:54,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-01 17:50:54,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:54,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:54,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:54,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:54,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:54,912 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 20 treesize of output 36 [2022-03-01 17:50:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:55,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:55,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:55,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:55,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:55,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:55,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937511636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:55,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:55,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:50:55,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870901701] [2022-03-01 17:50:55,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:55,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:50:55,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:55,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:50:55,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:55,446 INFO L87 Difference]: Start difference. First operand 4006 states and 17145 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:56,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:56,234 INFO L93 Difference]: Finished difference Result 4254 states and 18089 transitions. [2022-03-01 17:50:56,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:50:56,234 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:56,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:56,243 INFO L225 Difference]: With dead ends: 4254 [2022-03-01 17:50:56,243 INFO L226 Difference]: Without dead ends: 4239 [2022-03-01 17:50:56,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:50:56,244 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 120 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:56,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 598 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1473 Invalid, 0 Unknown, 81 Unchecked, 0.6s Time] [2022-03-01 17:50:56,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2022-03-01 17:50:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 4014. [2022-03-01 17:50:56,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4014 states, 4013 states have (on average 4.280837278843758) internal successors, (17179), 4013 states have internal predecessors, (17179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 17179 transitions. [2022-03-01 17:50:56,307 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 17179 transitions. Word has length 23 [2022-03-01 17:50:56,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:56,307 INFO L470 AbstractCegarLoop]: Abstraction has 4014 states and 17179 transitions. [2022-03-01 17:50:56,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:56,307 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 17179 transitions. [2022-03-01 17:50:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:56,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:56,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:56,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-01 17:50:56,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-03-01 17:50:56,514 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:56,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:56,514 INFO L85 PathProgramCache]: Analyzing trace with hash 557009460, now seen corresponding path program 41 times [2022-03-01 17:50:56,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:56,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742573225] [2022-03-01 17:50:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:56,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:56,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:56,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742573225] [2022-03-01 17:50:56,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742573225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:56,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597830150] [2022-03-01 17:50:56,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:50:56,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:56,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:56,667 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:56,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-01 17:50:56,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:50:56,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:56,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:56,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:56,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:56,839 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 21 treesize of output 37 [2022-03-01 17:50:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:57,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:57,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:57,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:57,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:57,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:57,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597830150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:57,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:57,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:50:57,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201293322] [2022-03-01 17:50:57,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:57,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:50:57,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:57,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:50:57,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:50:57,453 INFO L87 Difference]: Start difference. First operand 4014 states and 17179 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:58,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:58,165 INFO L93 Difference]: Finished difference Result 4303 states and 18252 transitions. [2022-03-01 17:50:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:50:58,165 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:58,175 INFO L225 Difference]: With dead ends: 4303 [2022-03-01 17:50:58,175 INFO L226 Difference]: Without dead ends: 4267 [2022-03-01 17:50:58,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:50:58,175 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 192 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:58,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 416 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 895 Invalid, 0 Unknown, 136 Unchecked, 0.4s Time] [2022-03-01 17:50:58,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2022-03-01 17:50:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 4026. [2022-03-01 17:50:58,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 4.2804968944099375) internal successors, (17229), 4025 states have internal predecessors, (17229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 17229 transitions. [2022-03-01 17:50:58,236 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 17229 transitions. Word has length 23 [2022-03-01 17:50:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:58,236 INFO L470 AbstractCegarLoop]: Abstraction has 4026 states and 17229 transitions. [2022-03-01 17:50:58,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 17229 transitions. [2022-03-01 17:50:58,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:50:58,242 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:58,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:58,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-01 17:50:58,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-01 17:50:58,443 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:50:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:58,443 INFO L85 PathProgramCache]: Analyzing trace with hash 727824392, now seen corresponding path program 42 times [2022-03-01 17:50:58,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:58,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132695318] [2022-03-01 17:50:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:58,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:58,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:58,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132695318] [2022-03-01 17:50:58,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132695318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:58,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118682572] [2022-03-01 17:50:58,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:50:58,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:58,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:58,600 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:58,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-01 17:50:58,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:50:58,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:58,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:58,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:58,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:58,802 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 24 treesize of output 40 [2022-03-01 17:50:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:59,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:59,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:59,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:50:59,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:59,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:50:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:59,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118682572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:59,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:59,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:50:59,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858119138] [2022-03-01 17:50:59,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:59,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:50:59,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:59,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:50:59,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:59,349 INFO L87 Difference]: Start difference. First operand 4026 states and 17229 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:59,958 INFO L93 Difference]: Finished difference Result 4244 states and 18054 transitions. [2022-03-01 17:50:59,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:50:59,958 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:50:59,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:59,968 INFO L225 Difference]: With dead ends: 4244 [2022-03-01 17:50:59,968 INFO L226 Difference]: Without dead ends: 4229 [2022-03-01 17:50:59,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:50:59,968 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 112 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:59,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 466 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1124 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-03-01 17:50:59,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2022-03-01 17:51:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4026. [2022-03-01 17:51:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 4.2804968944099375) internal successors, (17229), 4025 states have internal predecessors, (17229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 17229 transitions. [2022-03-01 17:51:00,034 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 17229 transitions. Word has length 23 [2022-03-01 17:51:00,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:00,034 INFO L470 AbstractCegarLoop]: Abstraction has 4026 states and 17229 transitions. [2022-03-01 17:51:00,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 17229 transitions. [2022-03-01 17:51:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:00,041 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:00,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:00,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:00,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-01 17:51:00,241 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:00,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:00,242 INFO L85 PathProgramCache]: Analyzing trace with hash 981570640, now seen corresponding path program 43 times [2022-03-01 17:51:00,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:00,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634163843] [2022-03-01 17:51:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:00,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:00,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:00,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634163843] [2022-03-01 17:51:00,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634163843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:00,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289278653] [2022-03-01 17:51:00,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:51:00,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:00,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:00,393 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:00,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-01 17:51:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:00,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:00,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:00,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:00,572 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 24 treesize of output 40 [2022-03-01 17:51:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:00,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:01,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:01,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:01,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:01,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:01,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289278653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:01,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:01,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:01,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594980120] [2022-03-01 17:51:01,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:01,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:01,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:01,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:01,123 INFO L87 Difference]: Start difference. First operand 4026 states and 17229 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:01,822 INFO L93 Difference]: Finished difference Result 4525 states and 19147 transitions. [2022-03-01 17:51:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:51:01,822 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:01,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:01,833 INFO L225 Difference]: With dead ends: 4525 [2022-03-01 17:51:01,834 INFO L226 Difference]: Without dead ends: 4503 [2022-03-01 17:51:01,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:51:01,834 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 144 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:01,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 556 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1253 Invalid, 0 Unknown, 161 Unchecked, 0.5s Time] [2022-03-01 17:51:01,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2022-03-01 17:51:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 4034. [2022-03-01 17:51:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4034 states, 4033 states have (on average 4.279940490949666) internal successors, (17261), 4033 states have internal predecessors, (17261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4034 states to 4034 states and 17261 transitions. [2022-03-01 17:51:01,901 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 17261 transitions. Word has length 23 [2022-03-01 17:51:01,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:01,901 INFO L470 AbstractCegarLoop]: Abstraction has 4034 states and 17261 transitions. [2022-03-01 17:51:01,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:01,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 17261 transitions. [2022-03-01 17:51:01,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:01,908 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:01,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:01,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-01 17:51:02,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-01 17:51:02,108 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:02,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1566904592, now seen corresponding path program 44 times [2022-03-01 17:51:02,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:02,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291781444] [2022-03-01 17:51:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:02,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:02,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:02,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291781444] [2022-03-01 17:51:02,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291781444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:02,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470425975] [2022-03-01 17:51:02,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:02,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:02,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:02,322 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:02,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-01 17:51:02,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:02,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:02,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:51:02,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:02,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:02,500 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 36 treesize of output 52 [2022-03-01 17:51:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:02,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:02,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:02,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:02,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:02,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:02,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470425975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:02,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:02,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:51:02,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582698539] [2022-03-01 17:51:02,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:02,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:51:02,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:02,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:51:02,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:51:02,836 INFO L87 Difference]: Start difference. First operand 4034 states and 17261 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:03,812 INFO L93 Difference]: Finished difference Result 4551 states and 19259 transitions. [2022-03-01 17:51:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:51:03,812 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:03,823 INFO L225 Difference]: With dead ends: 4551 [2022-03-01 17:51:03,823 INFO L226 Difference]: Without dead ends: 4525 [2022-03-01 17:51:03,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=297, Invalid=1425, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:51:03,823 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 206 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 626 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:03,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 530 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1097 Invalid, 0 Unknown, 626 Unchecked, 0.5s Time] [2022-03-01 17:51:03,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4525 states. [2022-03-01 17:51:03,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4525 to 4034. [2022-03-01 17:51:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4034 states, 4033 states have (on average 4.279940490949666) internal successors, (17261), 4033 states have internal predecessors, (17261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4034 states to 4034 states and 17261 transitions. [2022-03-01 17:51:03,888 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 17261 transitions. Word has length 23 [2022-03-01 17:51:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:03,888 INFO L470 AbstractCegarLoop]: Abstraction has 4034 states and 17261 transitions. [2022-03-01 17:51:03,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 17261 transitions. [2022-03-01 17:51:03,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:03,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:03,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:03,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:04,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-01 17:51:04,095 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:04,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1114495970, now seen corresponding path program 45 times [2022-03-01 17:51:04,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:04,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149016362] [2022-03-01 17:51:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:04,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:04,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:04,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149016362] [2022-03-01 17:51:04,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149016362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:04,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813923882] [2022-03-01 17:51:04,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:51:04,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:04,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:04,253 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:04,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-01 17:51:04,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:51:04,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:04,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:04,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:04,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:04,404 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 21 treesize of output 37 [2022-03-01 17:51:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:04,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:04,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:04,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:04,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:04,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:05,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813923882] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:05,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:05,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:05,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802754999] [2022-03-01 17:51:05,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:05,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:05,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:05,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:05,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:05,043 INFO L87 Difference]: Start difference. First operand 4034 states and 17261 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:06,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:06,296 INFO L93 Difference]: Finished difference Result 4616 states and 19509 transitions. [2022-03-01 17:51:06,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:51:06,297 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:51:06,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:06,310 INFO L225 Difference]: With dead ends: 4616 [2022-03-01 17:51:06,310 INFO L226 Difference]: Without dead ends: 4595 [2022-03-01 17:51:06,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=289, Invalid=1351, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:51:06,310 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 208 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:06,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 607 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1511 Invalid, 0 Unknown, 95 Unchecked, 0.7s Time] [2022-03-01 17:51:06,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4595 states. [2022-03-01 17:51:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4595 to 4030. [2022-03-01 17:51:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4030 states, 4029 states have (on average 4.279722015388434) internal successors, (17243), 4029 states have internal predecessors, (17243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:06,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4030 states to 4030 states and 17243 transitions. [2022-03-01 17:51:06,393 INFO L78 Accepts]: Start accepts. Automaton has 4030 states and 17243 transitions. Word has length 23 [2022-03-01 17:51:06,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:06,393 INFO L470 AbstractCegarLoop]: Abstraction has 4030 states and 17243 transitions. [2022-03-01 17:51:06,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4030 states and 17243 transitions. [2022-03-01 17:51:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:06,401 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:06,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:06,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-01 17:51:06,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-03-01 17:51:06,602 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:06,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:06,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1331068018, now seen corresponding path program 46 times [2022-03-01 17:51:06,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:06,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181134574] [2022-03-01 17:51:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:06,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:06,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:06,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181134574] [2022-03-01 17:51:06,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181134574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:06,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619004373] [2022-03-01 17:51:06,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:06,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:06,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:06,770 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:06,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-01 17:51:06,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:06,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:06,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:06,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:06,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:06,957 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 22 treesize of output 38 [2022-03-01 17:51:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:07,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:07,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:07,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:07,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:07,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:07,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619004373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:07,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:07,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:07,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286815408] [2022-03-01 17:51:07,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:07,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:07,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:07,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:07,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:07,551 INFO L87 Difference]: Start difference. First operand 4030 states and 17243 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:08,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:08,724 INFO L93 Difference]: Finished difference Result 4742 states and 19998 transitions. [2022-03-01 17:51:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:51:08,724 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:51:08,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:08,735 INFO L225 Difference]: With dead ends: 4742 [2022-03-01 17:51:08,735 INFO L226 Difference]: Without dead ends: 4707 [2022-03-01 17:51:08,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=1528, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:51:08,736 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 236 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:08,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 655 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1790 Invalid, 0 Unknown, 263 Unchecked, 0.7s Time] [2022-03-01 17:51:08,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2022-03-01 17:51:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 4038. [2022-03-01 17:51:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 4037 states have (on average 4.279663116175378) internal successors, (17277), 4037 states have internal predecessors, (17277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:08,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 17277 transitions. [2022-03-01 17:51:08,804 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 17277 transitions. Word has length 23 [2022-03-01 17:51:08,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:08,804 INFO L470 AbstractCegarLoop]: Abstraction has 4038 states and 17277 transitions. [2022-03-01 17:51:08,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:08,804 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 17277 transitions. [2022-03-01 17:51:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:08,811 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:08,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:08,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-03-01 17:51:09,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-01 17:51:09,011 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:09,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:09,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1412467074, now seen corresponding path program 47 times [2022-03-01 17:51:09,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:09,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521153669] [2022-03-01 17:51:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:09,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:09,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:09,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521153669] [2022-03-01 17:51:09,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521153669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:09,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640741153] [2022-03-01 17:51:09,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:51:09,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:09,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:09,175 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:09,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-01 17:51:09,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:51:09,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:09,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:51:09,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:09,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:09,339 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 25 treesize of output 41 [2022-03-01 17:51:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:09,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:09,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:09,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:09,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:09,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:09,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640741153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:09,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:09,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:09,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597250842] [2022-03-01 17:51:09,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:09,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:09,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:09,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:09,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:09,912 INFO L87 Difference]: Start difference. First operand 4038 states and 17277 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:11,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:11,176 INFO L93 Difference]: Finished difference Result 4641 states and 19611 transitions. [2022-03-01 17:51:11,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:51:11,176 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:51:11,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:11,187 INFO L225 Difference]: With dead ends: 4641 [2022-03-01 17:51:11,187 INFO L226 Difference]: Without dead ends: 4615 [2022-03-01 17:51:11,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:51:11,187 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 263 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:11,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 583 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1652 Invalid, 0 Unknown, 125 Unchecked, 0.7s Time] [2022-03-01 17:51:11,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4615 states. [2022-03-01 17:51:11,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4615 to 4030. [2022-03-01 17:51:11,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4030 states, 4029 states have (on average 4.279722015388434) internal successors, (17243), 4029 states have internal predecessors, (17243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4030 states to 4030 states and 17243 transitions. [2022-03-01 17:51:11,250 INFO L78 Accepts]: Start accepts. Automaton has 4030 states and 17243 transitions. Word has length 23 [2022-03-01 17:51:11,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:11,251 INFO L470 AbstractCegarLoop]: Abstraction has 4030 states and 17243 transitions. [2022-03-01 17:51:11,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:11,251 INFO L276 IsEmpty]: Start isEmpty. Operand 4030 states and 17243 transitions. [2022-03-01 17:51:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:11,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:11,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:11,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-01 17:51:11,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-01 17:51:11,457 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:11,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:11,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1268933488, now seen corresponding path program 48 times [2022-03-01 17:51:11,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:11,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473203389] [2022-03-01 17:51:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:11,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:11,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:11,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473203389] [2022-03-01 17:51:11,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473203389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:11,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897235142] [2022-03-01 17:51:11,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:51:11,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:11,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:11,620 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:11,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-01 17:51:11,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:51:11,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:11,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:51:11,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:11,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:11,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:11,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:11,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:11,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-03-01 17:51:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:11,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:51:12,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897235142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:12,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:12,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-03-01 17:51:12,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345997509] [2022-03-01 17:51:12,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:12,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:51:12,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:12,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:51:12,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:51:12,135 INFO L87 Difference]: Start difference. First operand 4030 states and 17243 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:13,961 INFO L93 Difference]: Finished difference Result 6185 states and 25902 transitions. [2022-03-01 17:51:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 17:51:13,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:13,976 INFO L225 Difference]: With dead ends: 6185 [2022-03-01 17:51:13,976 INFO L226 Difference]: Without dead ends: 6134 [2022-03-01 17:51:13,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=467, Invalid=1885, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:51:13,977 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 313 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:13,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 525 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:51:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2022-03-01 17:51:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 4333. [2022-03-01 17:51:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4333 states, 4332 states have (on average 4.288550323176362) internal successors, (18578), 4332 states have internal predecessors, (18578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4333 states to 4333 states and 18578 transitions. [2022-03-01 17:51:14,054 INFO L78 Accepts]: Start accepts. Automaton has 4333 states and 18578 transitions. Word has length 23 [2022-03-01 17:51:14,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:14,054 INFO L470 AbstractCegarLoop]: Abstraction has 4333 states and 18578 transitions. [2022-03-01 17:51:14,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:14,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4333 states and 18578 transitions. [2022-03-01 17:51:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:14,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:14,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:14,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-03-01 17:51:14,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:14,262 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:14,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1132683500, now seen corresponding path program 49 times [2022-03-01 17:51:14,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:14,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855708375] [2022-03-01 17:51:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:14,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:14,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:14,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855708375] [2022-03-01 17:51:14,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855708375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:14,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436999124] [2022-03-01 17:51:14,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:51:14,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:14,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:14,416 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:14,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-01 17:51:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:14,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:14,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:14,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:14,629 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 26 treesize of output 42 [2022-03-01 17:51:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:14,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:15,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:15,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:15,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:15,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:15,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436999124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:15,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:15,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:15,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893305799] [2022-03-01 17:51:15,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:15,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:15,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:15,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:15,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:15,153 INFO L87 Difference]: Start difference. First operand 4333 states and 18578 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:16,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:16,295 INFO L93 Difference]: Finished difference Result 4820 states and 20446 transitions. [2022-03-01 17:51:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:51:16,295 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:16,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:16,306 INFO L225 Difference]: With dead ends: 4820 [2022-03-01 17:51:16,307 INFO L226 Difference]: Without dead ends: 4798 [2022-03-01 17:51:16,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:51:16,307 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 163 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:16,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 706 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1819 Invalid, 0 Unknown, 61 Unchecked, 0.7s Time] [2022-03-01 17:51:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2022-03-01 17:51:16,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4339. [2022-03-01 17:51:16,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4339 states, 4338 states have (on average 4.288842784693407) internal successors, (18605), 4338 states have internal predecessors, (18605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 18605 transitions. [2022-03-01 17:51:16,375 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 18605 transitions. Word has length 23 [2022-03-01 17:51:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:16,375 INFO L470 AbstractCegarLoop]: Abstraction has 4339 states and 18605 transitions. [2022-03-01 17:51:16,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:16,375 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 18605 transitions. [2022-03-01 17:51:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:16,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:16,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:16,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-03-01 17:51:16,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:16,583 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:16,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:16,583 INFO L85 PathProgramCache]: Analyzing trace with hash -547349548, now seen corresponding path program 50 times [2022-03-01 17:51:16,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:16,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608487653] [2022-03-01 17:51:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:16,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:16,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:16,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608487653] [2022-03-01 17:51:16,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608487653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:16,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134803877] [2022-03-01 17:51:16,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:16,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:16,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:16,757 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:16,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-01 17:51:16,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:16,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:16,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:16,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:16,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:16,951 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 21 treesize of output 37 [2022-03-01 17:51:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:17,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:17,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:17,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:17,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:17,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:17,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134803877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:17,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:17,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:17,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049090336] [2022-03-01 17:51:17,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:17,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:17,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:17,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:17,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:17,507 INFO L87 Difference]: Start difference. First operand 4339 states and 18605 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:18,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:18,696 INFO L93 Difference]: Finished difference Result 4789 states and 20333 transitions. [2022-03-01 17:51:18,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:51:18,696 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:51:18,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:18,707 INFO L225 Difference]: With dead ends: 4789 [2022-03-01 17:51:18,707 INFO L226 Difference]: Without dead ends: 4763 [2022-03-01 17:51:18,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:51:18,708 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 236 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:18,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 494 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1258 Invalid, 0 Unknown, 181 Unchecked, 0.5s Time] [2022-03-01 17:51:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4763 states. [2022-03-01 17:51:18,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4763 to 4339. [2022-03-01 17:51:18,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4339 states, 4338 states have (on average 4.288842784693407) internal successors, (18605), 4338 states have internal predecessors, (18605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 18605 transitions. [2022-03-01 17:51:18,775 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 18605 transitions. Word has length 23 [2022-03-01 17:51:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:18,775 INFO L470 AbstractCegarLoop]: Abstraction has 4339 states and 18605 transitions. [2022-03-01 17:51:18,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:18,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 18605 transitions. [2022-03-01 17:51:18,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:18,783 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:18,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:18,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-03-01 17:51:18,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:18,989 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:18,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:18,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1066217186, now seen corresponding path program 51 times [2022-03-01 17:51:18,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:18,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491010926] [2022-03-01 17:51:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:18,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:19,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:19,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491010926] [2022-03-01 17:51:19,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491010926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:19,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808979748] [2022-03-01 17:51:19,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:51:19,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:19,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:19,173 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:19,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-01 17:51:19,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:51:19,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:19,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:19,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:19,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:19,335 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 21 treesize of output 37 [2022-03-01 17:51:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:19,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:19,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:19,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:19,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:19,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:19,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808979748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:19,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:19,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:19,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541642524] [2022-03-01 17:51:19,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:19,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:19,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:19,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:19,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:19,926 INFO L87 Difference]: Start difference. First operand 4339 states and 18605 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:21,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:21,724 INFO L93 Difference]: Finished difference Result 4931 states and 20899 transitions. [2022-03-01 17:51:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:51:21,725 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:51:21,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:21,736 INFO L225 Difference]: With dead ends: 4931 [2022-03-01 17:51:21,736 INFO L226 Difference]: Without dead ends: 4889 [2022-03-01 17:51:21,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=333, Invalid=2018, Unknown=1, NotChecked=0, Total=2352 [2022-03-01 17:51:21,737 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 214 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:21,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 571 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1541 Invalid, 0 Unknown, 66 Unchecked, 0.6s Time] [2022-03-01 17:51:21,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4889 states. [2022-03-01 17:51:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4889 to 4351. [2022-03-01 17:51:21,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4351 states, 4350 states have (on average 4.290344827586207) internal successors, (18663), 4350 states have internal predecessors, (18663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4351 states to 4351 states and 18663 transitions. [2022-03-01 17:51:21,831 INFO L78 Accepts]: Start accepts. Automaton has 4351 states and 18663 transitions. Word has length 23 [2022-03-01 17:51:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:21,831 INFO L470 AbstractCegarLoop]: Abstraction has 4351 states and 18663 transitions. [2022-03-01 17:51:21,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 4351 states and 18663 transitions. [2022-03-01 17:51:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:21,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:21,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:21,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-01 17:51:22,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:22,039 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:22,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1359904880, now seen corresponding path program 52 times [2022-03-01 17:51:22,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:22,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879986955] [2022-03-01 17:51:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:22,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:22,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:22,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879986955] [2022-03-01 17:51:22,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879986955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:22,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756742843] [2022-03-01 17:51:22,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:22,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:22,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:22,191 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:22,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-01 17:51:22,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:22,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:22,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:22,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:22,370 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 20 treesize of output 36 [2022-03-01 17:51:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:22,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:22,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:22,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:22,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:22,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:22,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756742843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:22,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:22,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:22,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840389998] [2022-03-01 17:51:22,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:22,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:22,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:22,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:22,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:22,892 INFO L87 Difference]: Start difference. First operand 4351 states and 18663 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:23,838 INFO L93 Difference]: Finished difference Result 4692 states and 19964 transitions. [2022-03-01 17:51:23,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:51:23,839 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:23,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:23,850 INFO L225 Difference]: With dead ends: 4692 [2022-03-01 17:51:23,851 INFO L226 Difference]: Without dead ends: 4670 [2022-03-01 17:51:23,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:51:23,851 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 173 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:23,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 632 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1688 Invalid, 0 Unknown, 132 Unchecked, 0.7s Time] [2022-03-01 17:51:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4670 states. [2022-03-01 17:51:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4670 to 4355. [2022-03-01 17:51:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4355 states, 4354 states have (on average 4.290537436839688) internal successors, (18681), 4354 states have internal predecessors, (18681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4355 states to 4355 states and 18681 transitions. [2022-03-01 17:51:23,950 INFO L78 Accepts]: Start accepts. Automaton has 4355 states and 18681 transitions. Word has length 23 [2022-03-01 17:51:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:23,950 INFO L470 AbstractCegarLoop]: Abstraction has 4355 states and 18681 transitions. [2022-03-01 17:51:23,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 4355 states and 18681 transitions. [2022-03-01 17:51:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:23,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:23,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:23,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-03-01 17:51:24,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-01 17:51:24,158 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:24,159 INFO L85 PathProgramCache]: Analyzing trace with hash -846378028, now seen corresponding path program 53 times [2022-03-01 17:51:24,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:24,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423328944] [2022-03-01 17:51:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:24,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:24,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:24,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423328944] [2022-03-01 17:51:24,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423328944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:24,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086301251] [2022-03-01 17:51:24,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:51:24,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:24,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:24,310 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:24,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-01 17:51:24,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:51:24,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:24,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:24,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:24,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:24,473 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 21 treesize of output 37 [2022-03-01 17:51:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:24,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:25,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:25,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:25,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:25,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:25,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086301251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:25,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:25,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:51:25,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938144268] [2022-03-01 17:51:25,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:25,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:51:25,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:25,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:51:25,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:51:25,056 INFO L87 Difference]: Start difference. First operand 4355 states and 18681 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:25,801 INFO L93 Difference]: Finished difference Result 4639 states and 19751 transitions. [2022-03-01 17:51:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:51:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:25,811 INFO L225 Difference]: With dead ends: 4639 [2022-03-01 17:51:25,812 INFO L226 Difference]: Without dead ends: 4614 [2022-03-01 17:51:25,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:51:25,812 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 145 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:25,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 430 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1029 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2022-03-01 17:51:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4614 states. [2022-03-01 17:51:25,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4614 to 4359. [2022-03-01 17:51:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 4.290270766406609) internal successors, (18697), 4358 states have internal predecessors, (18697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 18697 transitions. [2022-03-01 17:51:25,913 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 18697 transitions. Word has length 23 [2022-03-01 17:51:25,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:25,913 INFO L470 AbstractCegarLoop]: Abstraction has 4359 states and 18697 transitions. [2022-03-01 17:51:25,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:25,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 18697 transitions. [2022-03-01 17:51:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:25,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:25,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:25,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-01 17:51:26,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:26,121 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:26,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:26,122 INFO L85 PathProgramCache]: Analyzing trace with hash 229333128, now seen corresponding path program 54 times [2022-03-01 17:51:26,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:26,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047575008] [2022-03-01 17:51:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:26,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:26,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:26,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047575008] [2022-03-01 17:51:26,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047575008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:26,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691224947] [2022-03-01 17:51:26,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:51:26,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:26,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:26,273 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:26,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-01 17:51:26,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:51:26,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:26,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:26,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:26,473 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:51:26,474 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 48 treesize of output 68 [2022-03-01 17:51:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:26,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:26,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691224947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:26,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:26,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-03-01 17:51:26,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141031443] [2022-03-01 17:51:26,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:26,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:51:26,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:26,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:51:26,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:51:26,787 INFO L87 Difference]: Start difference. First operand 4359 states and 18697 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:28,130 INFO L93 Difference]: Finished difference Result 5302 states and 22358 transitions. [2022-03-01 17:51:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:51:28,130 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:28,144 INFO L225 Difference]: With dead ends: 5302 [2022-03-01 17:51:28,144 INFO L226 Difference]: Without dead ends: 5254 [2022-03-01 17:51:28,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=268, Invalid=1624, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:51:28,144 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 309 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:28,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 582 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:51:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5254 states. [2022-03-01 17:51:28,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5254 to 4377. [2022-03-01 17:51:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 4376 states have (on average 4.291590493601462) internal successors, (18780), 4376 states have internal predecessors, (18780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 18780 transitions. [2022-03-01 17:51:28,249 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 18780 transitions. Word has length 23 [2022-03-01 17:51:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:28,249 INFO L470 AbstractCegarLoop]: Abstraction has 4377 states and 18780 transitions. [2022-03-01 17:51:28,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 18780 transitions. [2022-03-01 17:51:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:28,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:28,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:28,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-03-01 17:51:28,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-01 17:51:28,456 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:28,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:28,457 INFO L85 PathProgramCache]: Analyzing trace with hash 510328980, now seen corresponding path program 55 times [2022-03-01 17:51:28,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:28,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521165160] [2022-03-01 17:51:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:28,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:28,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:28,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521165160] [2022-03-01 17:51:28,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521165160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:28,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408170082] [2022-03-01 17:51:28,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:51:28,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:28,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:28,654 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:28,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-01 17:51:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:28,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:28,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:28,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:28,808 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 21 treesize of output 37 [2022-03-01 17:51:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:29,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:29,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:29,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:29,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:29,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:29,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408170082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:29,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:29,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:29,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443047245] [2022-03-01 17:51:29,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:29,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:29,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:29,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:29,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:29,685 INFO L87 Difference]: Start difference. First operand 4377 states and 18780 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:30,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:30,688 INFO L93 Difference]: Finished difference Result 4798 states and 20394 transitions. [2022-03-01 17:51:30,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:51:30,689 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:30,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:30,700 INFO L225 Difference]: With dead ends: 4798 [2022-03-01 17:51:30,700 INFO L226 Difference]: Without dead ends: 4772 [2022-03-01 17:51:30,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=243, Invalid=1239, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:51:30,700 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 170 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:30,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 454 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1266 Invalid, 0 Unknown, 218 Unchecked, 0.5s Time] [2022-03-01 17:51:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2022-03-01 17:51:30,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 4386. [2022-03-01 17:51:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4385 states have (on average 4.290079817559863) internal successors, (18812), 4385 states have internal predecessors, (18812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 18812 transitions. [2022-03-01 17:51:30,798 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 18812 transitions. Word has length 23 [2022-03-01 17:51:30,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:30,798 INFO L470 AbstractCegarLoop]: Abstraction has 4386 states and 18812 transitions. [2022-03-01 17:51:30,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:30,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 18812 transitions. [2022-03-01 17:51:30,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:30,805 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:30,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:30,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-03-01 17:51:31,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-01 17:51:31,006 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:31,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:31,007 INFO L85 PathProgramCache]: Analyzing trace with hash -531247088, now seen corresponding path program 56 times [2022-03-01 17:51:31,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:31,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355177328] [2022-03-01 17:51:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:31,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:31,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:31,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355177328] [2022-03-01 17:51:31,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355177328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:31,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685824949] [2022-03-01 17:51:31,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:31,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:31,178 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:31,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-01 17:51:31,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:31,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:31,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:31,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:31,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:31,328 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 21 treesize of output 37 [2022-03-01 17:51:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:31,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:31,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:31,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:31,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:31,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:32,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685824949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:32,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:32,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:32,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323546689] [2022-03-01 17:51:32,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:32,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:32,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:32,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:32,045 INFO L87 Difference]: Start difference. First operand 4386 states and 18812 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:32,904 INFO L93 Difference]: Finished difference Result 4787 states and 20346 transitions. [2022-03-01 17:51:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:51:32,904 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:32,916 INFO L225 Difference]: With dead ends: 4787 [2022-03-01 17:51:32,916 INFO L226 Difference]: Without dead ends: 4759 [2022-03-01 17:51:32,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:51:32,917 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 189 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:32,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 407 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1054 Invalid, 0 Unknown, 108 Unchecked, 0.5s Time] [2022-03-01 17:51:32,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2022-03-01 17:51:33,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 4383. [2022-03-01 17:51:33,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4383 states, 4382 states have (on average 4.291191236878138) internal successors, (18804), 4382 states have internal predecessors, (18804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:33,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4383 states to 4383 states and 18804 transitions. [2022-03-01 17:51:33,025 INFO L78 Accepts]: Start accepts. Automaton has 4383 states and 18804 transitions. Word has length 23 [2022-03-01 17:51:33,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:33,025 INFO L470 AbstractCegarLoop]: Abstraction has 4383 states and 18804 transitions. [2022-03-01 17:51:33,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:33,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4383 states and 18804 transitions. [2022-03-01 17:51:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:33,033 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:33,033 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:33,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-03-01 17:51:33,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:33,234 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:33,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:33,235 INFO L85 PathProgramCache]: Analyzing trace with hash -818368440, now seen corresponding path program 57 times [2022-03-01 17:51:33,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:33,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32008490] [2022-03-01 17:51:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:33,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:33,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:33,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32008490] [2022-03-01 17:51:33,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32008490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:33,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284228929] [2022-03-01 17:51:33,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:51:33,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:33,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:33,419 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:33,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-01 17:51:33,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:51:33,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:33,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:33,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:33,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:33,572 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 25 treesize of output 41 [2022-03-01 17:51:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:33,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:34,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:34,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:34,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:34,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:34,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284228929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:34,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:34,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:34,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700633040] [2022-03-01 17:51:34,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:34,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:34,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:34,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:34,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:34,172 INFO L87 Difference]: Start difference. First operand 4383 states and 18804 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:35,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:35,131 INFO L93 Difference]: Finished difference Result 4808 states and 20435 transitions. [2022-03-01 17:51:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:51:35,131 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:35,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:35,143 INFO L225 Difference]: With dead ends: 4808 [2022-03-01 17:51:35,143 INFO L226 Difference]: Without dead ends: 4782 [2022-03-01 17:51:35,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:51:35,143 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 214 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:35,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 440 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1226 Invalid, 0 Unknown, 183 Unchecked, 0.5s Time] [2022-03-01 17:51:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4782 states. [2022-03-01 17:51:35,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4782 to 4383. [2022-03-01 17:51:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4383 states, 4382 states have (on average 4.291191236878138) internal successors, (18804), 4382 states have internal predecessors, (18804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4383 states to 4383 states and 18804 transitions. [2022-03-01 17:51:35,259 INFO L78 Accepts]: Start accepts. Automaton has 4383 states and 18804 transitions. Word has length 23 [2022-03-01 17:51:35,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:35,259 INFO L470 AbstractCegarLoop]: Abstraction has 4383 states and 18804 transitions. [2022-03-01 17:51:35,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:35,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4383 states and 18804 transitions. [2022-03-01 17:51:35,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:35,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:35,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:35,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-03-01 17:51:35,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-03-01 17:51:35,468 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:35,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:35,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1311585826, now seen corresponding path program 58 times [2022-03-01 17:51:35,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:35,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198722650] [2022-03-01 17:51:35,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:35,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:35,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:35,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198722650] [2022-03-01 17:51:35,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198722650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:35,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921653561] [2022-03-01 17:51:35,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:35,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:35,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:35,652 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:35,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-01 17:51:35,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:35,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:35,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:35,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:35,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:35,844 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 21 treesize of output 37 [2022-03-01 17:51:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:36,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:36,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:36,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:36,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:36,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:36,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921653561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:36,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:36,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:36,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601236207] [2022-03-01 17:51:36,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:36,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:36,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:36,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:36,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:36,490 INFO L87 Difference]: Start difference. First operand 4383 states and 18804 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:37,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:37,149 INFO L93 Difference]: Finished difference Result 4650 states and 19800 transitions. [2022-03-01 17:51:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:51:37,149 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:51:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:37,160 INFO L225 Difference]: With dead ends: 4650 [2022-03-01 17:51:37,160 INFO L226 Difference]: Without dead ends: 4629 [2022-03-01 17:51:37,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:51:37,161 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 167 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:37,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 374 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 874 Invalid, 0 Unknown, 127 Unchecked, 0.4s Time] [2022-03-01 17:51:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2022-03-01 17:51:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 4383. [2022-03-01 17:51:37,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4383 states, 4382 states have (on average 4.291191236878138) internal successors, (18804), 4382 states have internal predecessors, (18804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4383 states to 4383 states and 18804 transitions. [2022-03-01 17:51:37,229 INFO L78 Accepts]: Start accepts. Automaton has 4383 states and 18804 transitions. Word has length 23 [2022-03-01 17:51:37,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:37,230 INFO L470 AbstractCegarLoop]: Abstraction has 4383 states and 18804 transitions. [2022-03-01 17:51:37,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:37,230 INFO L276 IsEmpty]: Start isEmpty. Operand 4383 states and 18804 transitions. [2022-03-01 17:51:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:37,237 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:37,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:37,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:37,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:37,438 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:37,438 INFO L85 PathProgramCache]: Analyzing trace with hash -376809570, now seen corresponding path program 59 times [2022-03-01 17:51:37,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:37,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024784711] [2022-03-01 17:51:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:37,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:37,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:37,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024784711] [2022-03-01 17:51:37,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024784711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:37,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131809698] [2022-03-01 17:51:37,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:51:37,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:37,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:37,623 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:37,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-01 17:51:37,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:51:37,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:37,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:51:37,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:37,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:37,805 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 27 treesize of output 43 [2022-03-01 17:51:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:37,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:38,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:38,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:38,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:38,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:38,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131809698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:38,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:38,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:51:38,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320528391] [2022-03-01 17:51:38,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:38,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:51:38,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:51:38,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:51:38,159 INFO L87 Difference]: Start difference. First operand 4383 states and 18804 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:38,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:38,879 INFO L93 Difference]: Finished difference Result 4716 states and 20073 transitions. [2022-03-01 17:51:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:51:38,880 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:38,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:38,891 INFO L225 Difference]: With dead ends: 4716 [2022-03-01 17:51:38,892 INFO L226 Difference]: Without dead ends: 4691 [2022-03-01 17:51:38,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:51:38,892 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 133 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:38,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 324 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:51:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2022-03-01 17:51:38,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4387. [2022-03-01 17:51:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4387 states, 4386 states have (on average 4.29092567259462) internal successors, (18820), 4386 states have internal predecessors, (18820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4387 states to 4387 states and 18820 transitions. [2022-03-01 17:51:38,964 INFO L78 Accepts]: Start accepts. Automaton has 4387 states and 18820 transitions. Word has length 23 [2022-03-01 17:51:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:38,964 INFO L470 AbstractCegarLoop]: Abstraction has 4387 states and 18820 transitions. [2022-03-01 17:51:38,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 4387 states and 18820 transitions. [2022-03-01 17:51:38,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:38,973 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:38,973 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:38,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:39,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:39,173 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:39,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1389502102, now seen corresponding path program 60 times [2022-03-01 17:51:39,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:39,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712747094] [2022-03-01 17:51:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:39,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:39,344 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:39,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712747094] [2022-03-01 17:51:39,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712747094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:39,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007460773] [2022-03-01 17:51:39,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:51:39,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:39,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:39,346 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:39,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-01 17:51:39,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:51:39,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:39,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:39,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:39,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:39,492 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 21 treesize of output 37 [2022-03-01 17:51:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:39,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:40,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:40,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:40,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:40,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:40,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007460773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:40,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:40,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:51:40,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652599621] [2022-03-01 17:51:40,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:40,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:51:40,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:40,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:51:40,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:51:40,180 INFO L87 Difference]: Start difference. First operand 4387 states and 18820 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:40,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:40,894 INFO L93 Difference]: Finished difference Result 4724 states and 20101 transitions. [2022-03-01 17:51:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:51:40,895 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:40,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:40,906 INFO L225 Difference]: With dead ends: 4724 [2022-03-01 17:51:40,906 INFO L226 Difference]: Without dead ends: 4703 [2022-03-01 17:51:40,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:51:40,906 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 158 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:40,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 370 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1083 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-03-01 17:51:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4703 states. [2022-03-01 17:51:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4703 to 4383. [2022-03-01 17:51:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4383 states, 4382 states have (on average 4.291191236878138) internal successors, (18804), 4382 states have internal predecessors, (18804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4383 states to 4383 states and 18804 transitions. [2022-03-01 17:51:40,975 INFO L78 Accepts]: Start accepts. Automaton has 4383 states and 18804 transitions. Word has length 23 [2022-03-01 17:51:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:40,975 INFO L470 AbstractCegarLoop]: Abstraction has 4383 states and 18804 transitions. [2022-03-01 17:51:40,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4383 states and 18804 transitions. [2022-03-01 17:51:40,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:40,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:40,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:40,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-03-01 17:51:41,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:41,183 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:41,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:41,184 INFO L85 PathProgramCache]: Analyzing trace with hash -240635982, now seen corresponding path program 61 times [2022-03-01 17:51:41,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:41,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906059048] [2022-03-01 17:51:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:41,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:41,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:41,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906059048] [2022-03-01 17:51:41,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906059048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:41,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031046270] [2022-03-01 17:51:41,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:51:41,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:41,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:41,351 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:41,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-01 17:51:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:41,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:41,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:41,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:41,532 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 22 treesize of output 38 [2022-03-01 17:51:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:41,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:41,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:41,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:42,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:42,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:42,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031046270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:42,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:42,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:42,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554828827] [2022-03-01 17:51:42,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:42,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:42,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:42,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:42,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:42,046 INFO L87 Difference]: Start difference. First operand 4383 states and 18804 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:42,793 INFO L93 Difference]: Finished difference Result 4768 states and 20264 transitions. [2022-03-01 17:51:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:51:42,794 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:51:42,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:42,805 INFO L225 Difference]: With dead ends: 4768 [2022-03-01 17:51:42,805 INFO L226 Difference]: Without dead ends: 4733 [2022-03-01 17:51:42,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:51:42,806 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 151 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:42,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 480 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1333 Invalid, 0 Unknown, 101 Unchecked, 0.5s Time] [2022-03-01 17:51:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2022-03-01 17:51:42,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 4383. [2022-03-01 17:51:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4383 states, 4382 states have (on average 4.290278411684162) internal successors, (18800), 4382 states have internal predecessors, (18800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:42,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4383 states to 4383 states and 18800 transitions. [2022-03-01 17:51:42,894 INFO L78 Accepts]: Start accepts. Automaton has 4383 states and 18800 transitions. Word has length 23 [2022-03-01 17:51:42,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:42,894 INFO L470 AbstractCegarLoop]: Abstraction has 4383 states and 18800 transitions. [2022-03-01 17:51:42,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:42,895 INFO L276 IsEmpty]: Start isEmpty. Operand 4383 states and 18800 transitions. [2022-03-01 17:51:42,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:42,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:42,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:42,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-03-01 17:51:43,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:43,112 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:43,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:43,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1504648054, now seen corresponding path program 62 times [2022-03-01 17:51:43,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:43,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882139544] [2022-03-01 17:51:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:43,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:43,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:43,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882139544] [2022-03-01 17:51:43,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882139544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:43,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821308187] [2022-03-01 17:51:43,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:43,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:43,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:43,279 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:43,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-01 17:51:43,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:43,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:43,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:51:43,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:43,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:43,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:43,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:43,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:43,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 32 [2022-03-01 17:51:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:43,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:44,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:44,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:44,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:44,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:44,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821308187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:44,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:44,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:51:44,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239855777] [2022-03-01 17:51:44,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:44,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:51:44,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:44,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:51:44,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:51:44,125 INFO L87 Difference]: Start difference. First operand 4383 states and 18800 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:45,668 INFO L93 Difference]: Finished difference Result 5154 states and 21767 transitions. [2022-03-01 17:51:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:51:45,669 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:45,681 INFO L225 Difference]: With dead ends: 5154 [2022-03-01 17:51:45,681 INFO L226 Difference]: Without dead ends: 5128 [2022-03-01 17:51:45,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=309, Invalid=1853, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 17:51:45,682 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 210 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:45,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 615 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1789 Invalid, 0 Unknown, 119 Unchecked, 0.8s Time] [2022-03-01 17:51:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5128 states. [2022-03-01 17:51:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5128 to 4390. [2022-03-01 17:51:45,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4390 states, 4389 states have (on average 4.2889040783777626) internal successors, (18824), 4389 states have internal predecessors, (18824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4390 states to 4390 states and 18824 transitions. [2022-03-01 17:51:45,774 INFO L78 Accepts]: Start accepts. Automaton has 4390 states and 18824 transitions. Word has length 23 [2022-03-01 17:51:45,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:45,774 INFO L470 AbstractCegarLoop]: Abstraction has 4390 states and 18824 transitions. [2022-03-01 17:51:45,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 4390 states and 18824 transitions. [2022-03-01 17:51:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:45,782 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:45,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:45,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:45,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:45,982 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:45,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:45,983 INFO L85 PathProgramCache]: Analyzing trace with hash 463071986, now seen corresponding path program 63 times [2022-03-01 17:51:45,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:45,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044864063] [2022-03-01 17:51:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:45,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:46,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:46,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044864063] [2022-03-01 17:51:46,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044864063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:46,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436559972] [2022-03-01 17:51:46,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:51:46,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:46,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:46,144 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:46,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-01 17:51:46,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:51:46,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:46,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:46,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:46,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:46,336 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:51:46,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 48 [2022-03-01 17:51:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:46,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:46,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436559972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:46,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:46,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-03-01 17:51:46,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332093232] [2022-03-01 17:51:46,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:46,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:46,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:46,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:46,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:46,674 INFO L87 Difference]: Start difference. First operand 4390 states and 18824 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:48,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:48,314 INFO L93 Difference]: Finished difference Result 5494 states and 23092 transitions. [2022-03-01 17:51:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-01 17:51:48,314 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:48,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:48,328 INFO L225 Difference]: With dead ends: 5494 [2022-03-01 17:51:48,328 INFO L226 Difference]: Without dead ends: 5437 [2022-03-01 17:51:48,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=339, Invalid=2211, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:51:48,329 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 380 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1963 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 2087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:48,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 575 Invalid, 2087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1963 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:51:48,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2022-03-01 17:51:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 4399. [2022-03-01 17:51:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4398 states have (on average 4.292178262846749) internal successors, (18877), 4398 states have internal predecessors, (18877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 18877 transitions. [2022-03-01 17:51:48,440 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 18877 transitions. Word has length 23 [2022-03-01 17:51:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:48,440 INFO L470 AbstractCegarLoop]: Abstraction has 4399 states and 18877 transitions. [2022-03-01 17:51:48,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 18877 transitions. [2022-03-01 17:51:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:48,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:48,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:48,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-01 17:51:48,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:48,649 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:48,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:48,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1519416958, now seen corresponding path program 64 times [2022-03-01 17:51:48,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:48,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579880310] [2022-03-01 17:51:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:48,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:48,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:48,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579880310] [2022-03-01 17:51:48,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579880310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:48,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108434677] [2022-03-01 17:51:48,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:48,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:48,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:48,802 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:48,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-01 17:51:48,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:48,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:48,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:48,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:48,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:48,981 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 22 treesize of output 38 [2022-03-01 17:51:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:49,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:49,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:49,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:49,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:49,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:49,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108434677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:49,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:49,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:49,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223484212] [2022-03-01 17:51:49,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:49,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:49,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:49,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:49,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:49,485 INFO L87 Difference]: Start difference. First operand 4399 states and 18877 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:50,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:50,711 INFO L93 Difference]: Finished difference Result 4996 states and 21176 transitions. [2022-03-01 17:51:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:51:50,711 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:51:50,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:50,723 INFO L225 Difference]: With dead ends: 4996 [2022-03-01 17:51:50,723 INFO L226 Difference]: Without dead ends: 4961 [2022-03-01 17:51:50,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=1637, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:51:50,724 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 208 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:50,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 682 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1889 Invalid, 0 Unknown, 98 Unchecked, 0.8s Time] [2022-03-01 17:51:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2022-03-01 17:51:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 4399. [2022-03-01 17:51:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4398 states have (on average 4.288994997726239) internal successors, (18863), 4398 states have internal predecessors, (18863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 18863 transitions. [2022-03-01 17:51:50,800 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 18863 transitions. Word has length 23 [2022-03-01 17:51:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:50,800 INFO L470 AbstractCegarLoop]: Abstraction has 4399 states and 18863 transitions. [2022-03-01 17:51:50,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 18863 transitions. [2022-03-01 17:51:50,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:50,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:50,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:50,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:51,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-01 17:51:51,008 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:51,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:51,008 INFO L85 PathProgramCache]: Analyzing trace with hash 715017734, now seen corresponding path program 65 times [2022-03-01 17:51:51,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:51,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833010083] [2022-03-01 17:51:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:51,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:51,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:51,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833010083] [2022-03-01 17:51:51,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833010083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:51,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268156120] [2022-03-01 17:51:51,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:51:51,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:51,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:51,198 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:51,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-01 17:51:51,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:51:51,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:51,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:51,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:51,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:51,372 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 21 treesize of output 37 [2022-03-01 17:51:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:51,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:51,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:51,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:51,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:51,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:51,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268156120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:51,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:51,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:51,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380683331] [2022-03-01 17:51:51,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:51,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:51,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:51,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:51,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:51,932 INFO L87 Difference]: Start difference. First operand 4399 states and 18863 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:53,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:53,191 INFO L93 Difference]: Finished difference Result 4924 states and 20894 transitions. [2022-03-01 17:51:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:51:53,192 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:51:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:53,203 INFO L225 Difference]: With dead ends: 4924 [2022-03-01 17:51:53,203 INFO L226 Difference]: Without dead ends: 4898 [2022-03-01 17:51:53,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=293, Invalid=1687, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:51:53,204 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 210 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:53,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 560 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1576 Invalid, 0 Unknown, 110 Unchecked, 0.6s Time] [2022-03-01 17:51:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2022-03-01 17:51:53,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 4399. [2022-03-01 17:51:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4398 states have (on average 4.288994997726239) internal successors, (18863), 4398 states have internal predecessors, (18863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:53,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 18863 transitions. [2022-03-01 17:51:53,280 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 18863 transitions. Word has length 23 [2022-03-01 17:51:53,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:53,280 INFO L470 AbstractCegarLoop]: Abstraction has 4399 states and 18863 transitions. [2022-03-01 17:51:53,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 18863 transitions. [2022-03-01 17:51:53,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:53,288 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:53,288 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:53,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-03-01 17:51:53,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-01 17:51:53,489 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:53,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1966382828, now seen corresponding path program 66 times [2022-03-01 17:51:53,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:53,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474901589] [2022-03-01 17:51:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:53,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:53,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:53,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474901589] [2022-03-01 17:51:53,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474901589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:53,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653786078] [2022-03-01 17:51:53,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:51:53,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:53,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:53,655 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:53,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-01 17:51:53,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:51:53,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:53,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:53,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:53,821 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 21 treesize of output 37 [2022-03-01 17:51:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:54,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:54,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:54,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:54,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:54,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:54,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653786078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:54,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:54,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:54,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031668708] [2022-03-01 17:51:54,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:54,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:54,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:54,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:54,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:54,438 INFO L87 Difference]: Start difference. First operand 4399 states and 18863 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:55,615 INFO L93 Difference]: Finished difference Result 4928 states and 20905 transitions. [2022-03-01 17:51:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:51:55,616 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:51:55,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:55,627 INFO L225 Difference]: With dead ends: 4928 [2022-03-01 17:51:55,627 INFO L226 Difference]: Without dead ends: 4907 [2022-03-01 17:51:55,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=260, Invalid=1462, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:51:55,628 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 198 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:55,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 552 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1561 Invalid, 0 Unknown, 184 Unchecked, 0.6s Time] [2022-03-01 17:51:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4907 states. [2022-03-01 17:51:55,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4907 to 4399. [2022-03-01 17:51:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4398 states have (on average 4.288994997726239) internal successors, (18863), 4398 states have internal predecessors, (18863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:55,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 18863 transitions. [2022-03-01 17:51:55,710 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 18863 transitions. Word has length 23 [2022-03-01 17:51:55,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:55,710 INFO L470 AbstractCegarLoop]: Abstraction has 4399 states and 18863 transitions. [2022-03-01 17:51:55,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:55,710 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 18863 transitions. [2022-03-01 17:51:55,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:55,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:55,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:55,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-03-01 17:51:55,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-01 17:51:55,934 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:55,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:55,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1875237754, now seen corresponding path program 67 times [2022-03-01 17:51:55,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:55,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966705386] [2022-03-01 17:51:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:55,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:56,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:56,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966705386] [2022-03-01 17:51:56,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966705386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:56,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788074841] [2022-03-01 17:51:56,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:51:56,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:56,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:56,103 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:56,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-01 17:51:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:56,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:56,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:56,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:56,249 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 21 treesize of output 37 [2022-03-01 17:51:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:56,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:57,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:57,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:57,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:57,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:57,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788074841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:57,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:57,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:57,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87611645] [2022-03-01 17:51:57,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:57,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:57,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:57,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:57,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:57,123 INFO L87 Difference]: Start difference. First operand 4399 states and 18863 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:58,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:58,103 INFO L93 Difference]: Finished difference Result 4822 states and 20488 transitions. [2022-03-01 17:51:58,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:51:58,104 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:51:58,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:58,115 INFO L225 Difference]: With dead ends: 4822 [2022-03-01 17:51:58,115 INFO L226 Difference]: Without dead ends: 4796 [2022-03-01 17:51:58,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=243, Invalid=1239, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:51:58,116 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 197 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:58,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 426 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1179 Invalid, 0 Unknown, 226 Unchecked, 0.5s Time] [2022-03-01 17:51:58,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4796 states. [2022-03-01 17:51:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4796 to 4408. [2022-03-01 17:51:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4408 states, 4407 states have (on average 4.2874971636033585) internal successors, (18895), 4407 states have internal predecessors, (18895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 18895 transitions. [2022-03-01 17:51:58,184 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 18895 transitions. Word has length 23 [2022-03-01 17:51:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:58,184 INFO L470 AbstractCegarLoop]: Abstraction has 4408 states and 18895 transitions. [2022-03-01 17:51:58,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 18895 transitions. [2022-03-01 17:51:58,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:51:58,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:58,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:58,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-03-01 17:51:58,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:58,395 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:51:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:58,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1378153474, now seen corresponding path program 68 times [2022-03-01 17:51:58,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:58,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610154147] [2022-03-01 17:51:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:58,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:58,569 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:58,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610154147] [2022-03-01 17:51:58,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610154147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:58,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169873919] [2022-03-01 17:51:58,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:58,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:58,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:58,570 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:58,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-01 17:51:58,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:58,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:58,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:51:58,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:58,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:58,719 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 25 treesize of output 41 [2022-03-01 17:51:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:59,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:59,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:59,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:59,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:59,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:59,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169873919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:59,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:59,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:51:59,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917567545] [2022-03-01 17:51:59,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:59,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:51:59,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:59,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:51:59,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:51:59,419 INFO L87 Difference]: Start difference. First operand 4408 states and 18895 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:00,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:00,398 INFO L93 Difference]: Finished difference Result 4811 states and 20440 transitions. [2022-03-01 17:52:00,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:52:00,398 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:00,410 INFO L225 Difference]: With dead ends: 4811 [2022-03-01 17:52:00,410 INFO L226 Difference]: Without dead ends: 4783 [2022-03-01 17:52:00,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:52:00,411 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 140 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:00,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 512 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1418 Invalid, 0 Unknown, 57 Unchecked, 0.6s Time] [2022-03-01 17:52:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2022-03-01 17:52:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 4401. [2022-03-01 17:52:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4401 states, 4400 states have (on average 4.2888636363636365) internal successors, (18871), 4400 states have internal predecessors, (18871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4401 states to 4401 states and 18871 transitions. [2022-03-01 17:52:00,485 INFO L78 Accepts]: Start accepts. Automaton has 4401 states and 18871 transitions. Word has length 23 [2022-03-01 17:52:00,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:00,485 INFO L470 AbstractCegarLoop]: Abstraction has 4401 states and 18871 transitions. [2022-03-01 17:52:00,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 4401 states and 18871 transitions. [2022-03-01 17:52:00,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:00,494 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:00,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:00,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:00,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:00,694 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:00,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:00,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1091032122, now seen corresponding path program 69 times [2022-03-01 17:52:00,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:00,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140686398] [2022-03-01 17:52:00,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:00,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:00,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:00,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140686398] [2022-03-01 17:52:00,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140686398] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:00,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666863978] [2022-03-01 17:52:00,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:00,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:00,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:00,880 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:00,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-01 17:52:00,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:52:00,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:00,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:01,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:01,056 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:52:01,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2022-03-01 17:52:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:01,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:01,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666863978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:01,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:01,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:52:01,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113286561] [2022-03-01 17:52:01,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:01,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:52:01,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:01,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:52:01,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:52:01,490 INFO L87 Difference]: Start difference. First operand 4401 states and 18871 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:03,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:03,862 INFO L93 Difference]: Finished difference Result 5305 states and 22368 transitions. [2022-03-01 17:52:03,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 17:52:03,862 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:03,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:03,876 INFO L225 Difference]: With dead ends: 5305 [2022-03-01 17:52:03,876 INFO L226 Difference]: Without dead ends: 5247 [2022-03-01 17:52:03,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=512, Invalid=3520, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 17:52:03,877 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 432 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1840 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:03,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 601 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1840 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:52:03,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5247 states. [2022-03-01 17:52:03,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5247 to 4411. [2022-03-01 17:52:03,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4411 states, 4410 states have (on average 4.289342403628118) internal successors, (18916), 4410 states have internal predecessors, (18916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:03,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4411 states to 4411 states and 18916 transitions. [2022-03-01 17:52:03,958 INFO L78 Accepts]: Start accepts. Automaton has 4411 states and 18916 transitions. Word has length 23 [2022-03-01 17:52:03,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:03,958 INFO L470 AbstractCegarLoop]: Abstraction has 4411 states and 18916 transitions. [2022-03-01 17:52:03,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:03,958 INFO L276 IsEmpty]: Start isEmpty. Operand 4411 states and 18916 transitions. [2022-03-01 17:52:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:03,966 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:03,966 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:03,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-03-01 17:52:04,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-03-01 17:52:04,166 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:04,166 INFO L85 PathProgramCache]: Analyzing trace with hash 597814736, now seen corresponding path program 70 times [2022-03-01 17:52:04,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:04,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599824126] [2022-03-01 17:52:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:04,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:04,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:04,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599824126] [2022-03-01 17:52:04,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599824126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:04,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645391200] [2022-03-01 17:52:04,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:04,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:04,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:04,340 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:04,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-01 17:52:04,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:04,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:04,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:04,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:04,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:04,484 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 21 treesize of output 37 [2022-03-01 17:52:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:04,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:05,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:05,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:05,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:05,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:05,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645391200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:05,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:05,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:52:05,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595199376] [2022-03-01 17:52:05,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:05,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:05,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:05,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:05,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:52:05,137 INFO L87 Difference]: Start difference. First operand 4411 states and 18916 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:06,330 INFO L93 Difference]: Finished difference Result 4803 states and 20418 transitions. [2022-03-01 17:52:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:52:06,330 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:52:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:06,342 INFO L225 Difference]: With dead ends: 4803 [2022-03-01 17:52:06,342 INFO L226 Difference]: Without dead ends: 4782 [2022-03-01 17:52:06,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=1186, Unknown=1, NotChecked=0, Total=1406 [2022-03-01 17:52:06,343 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 178 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:06,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 456 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1231 Invalid, 0 Unknown, 54 Unchecked, 0.5s Time] [2022-03-01 17:52:06,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4782 states. [2022-03-01 17:52:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4782 to 4411. [2022-03-01 17:52:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4411 states, 4410 states have (on average 4.289342403628118) internal successors, (18916), 4410 states have internal predecessors, (18916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4411 states to 4411 states and 18916 transitions. [2022-03-01 17:52:06,417 INFO L78 Accepts]: Start accepts. Automaton has 4411 states and 18916 transitions. Word has length 23 [2022-03-01 17:52:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:06,417 INFO L470 AbstractCegarLoop]: Abstraction has 4411 states and 18916 transitions. [2022-03-01 17:52:06,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:06,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4411 states and 18916 transitions. [2022-03-01 17:52:06,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:06,424 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:06,424 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:06,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-03-01 17:52:06,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:06,625 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:06,625 INFO L85 PathProgramCache]: Analyzing trace with hash 519898460, now seen corresponding path program 71 times [2022-03-01 17:52:06,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:06,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749337305] [2022-03-01 17:52:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:06,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:06,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:06,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749337305] [2022-03-01 17:52:06,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749337305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:06,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529405565] [2022-03-01 17:52:06,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:06,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:06,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:06,788 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:06,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-01 17:52:06,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:52:06,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:06,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:06,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:06,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:06,930 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 21 treesize of output 37 [2022-03-01 17:52:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:07,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:07,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:07,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:07,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:07,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:07,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529405565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:07,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:07,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:52:07,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249763343] [2022-03-01 17:52:07,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:07,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:52:07,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:07,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:52:07,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:52:07,585 INFO L87 Difference]: Start difference. First operand 4411 states and 18916 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:08,279 INFO L93 Difference]: Finished difference Result 4751 states and 20212 transitions. [2022-03-01 17:52:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:52:08,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:08,291 INFO L225 Difference]: With dead ends: 4751 [2022-03-01 17:52:08,291 INFO L226 Difference]: Without dead ends: 4730 [2022-03-01 17:52:08,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:52:08,292 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 129 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:08,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 376 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1102 Invalid, 0 Unknown, 85 Unchecked, 0.4s Time] [2022-03-01 17:52:08,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4730 states. [2022-03-01 17:52:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4730 to 4413. [2022-03-01 17:52:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4412 states have (on average 4.289664551223935) internal successors, (18926), 4412 states have internal predecessors, (18926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 18926 transitions. [2022-03-01 17:52:08,387 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 18926 transitions. Word has length 23 [2022-03-01 17:52:08,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:08,387 INFO L470 AbstractCegarLoop]: Abstraction has 4413 states and 18926 transitions. [2022-03-01 17:52:08,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 18926 transitions. [2022-03-01 17:52:08,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:08,395 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:08,395 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:08,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-03-01 17:52:08,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:08,596 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:08,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:08,596 INFO L85 PathProgramCache]: Analyzing trace with hash 175331356, now seen corresponding path program 72 times [2022-03-01 17:52:08,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:08,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743095557] [2022-03-01 17:52:08,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:08,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:08,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:08,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743095557] [2022-03-01 17:52:08,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743095557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:08,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832868279] [2022-03-01 17:52:08,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:08,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:08,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:08,749 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:08,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-01 17:52:08,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:52:08,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:08,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:08,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:08,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:08,920 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 20 treesize of output 36 [2022-03-01 17:52:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:09,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:09,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:09,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:09,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:09,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:09,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832868279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:09,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:09,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:52:09,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684861267] [2022-03-01 17:52:09,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:09,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:09,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:09,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:09,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:52:09,445 INFO L87 Difference]: Start difference. First operand 4413 states and 18926 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:10,478 INFO L93 Difference]: Finished difference Result 5020 states and 21272 transitions. [2022-03-01 17:52:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:52:10,478 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:10,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:10,491 INFO L225 Difference]: With dead ends: 5020 [2022-03-01 17:52:10,491 INFO L226 Difference]: Without dead ends: 4998 [2022-03-01 17:52:10,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:52:10,492 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 178 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:10,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 719 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1699 Invalid, 0 Unknown, 109 Unchecked, 0.7s Time] [2022-03-01 17:52:10,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4998 states. [2022-03-01 17:52:10,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4998 to 4425. [2022-03-01 17:52:10,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4425 states, 4424 states have (on average 4.287974683544304) internal successors, (18970), 4424 states have internal predecessors, (18970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:10,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 18970 transitions. [2022-03-01 17:52:10,572 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 18970 transitions. Word has length 23 [2022-03-01 17:52:10,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:10,572 INFO L470 AbstractCegarLoop]: Abstraction has 4425 states and 18970 transitions. [2022-03-01 17:52:10,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:10,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 18970 transitions. [2022-03-01 17:52:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:10,597 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:10,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:10,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:10,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2022-03-01 17:52:10,798 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:10,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:10,799 INFO L85 PathProgramCache]: Analyzing trace with hash 760665308, now seen corresponding path program 73 times [2022-03-01 17:52:10,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:10,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011571462] [2022-03-01 17:52:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:10,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:10,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:10,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011571462] [2022-03-01 17:52:10,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011571462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:10,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041342366] [2022-03-01 17:52:10,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:10,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:10,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:10,961 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:10,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-01 17:52:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:10,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:10,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:11,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:11,113 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 21 treesize of output 37 [2022-03-01 17:52:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:11,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:11,601 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:11,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:11,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:11,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:11,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041342366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:11,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:11,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:52:11,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185136635] [2022-03-01 17:52:11,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:11,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:11,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:11,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:11,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:52:11,650 INFO L87 Difference]: Start difference. First operand 4425 states and 18970 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:12,909 INFO L93 Difference]: Finished difference Result 4969 states and 21071 transitions. [2022-03-01 17:52:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:52:12,910 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:52:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:12,922 INFO L225 Difference]: With dead ends: 4969 [2022-03-01 17:52:12,922 INFO L226 Difference]: Without dead ends: 4943 [2022-03-01 17:52:12,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:52:12,923 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 208 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:12,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 602 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1505 Invalid, 0 Unknown, 252 Unchecked, 0.6s Time] [2022-03-01 17:52:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4943 states. [2022-03-01 17:52:12,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4943 to 4421. [2022-03-01 17:52:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4421 states, 4420 states have (on average 4.287782805429864) internal successors, (18952), 4420 states have internal predecessors, (18952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4421 states to 4421 states and 18952 transitions. [2022-03-01 17:52:12,999 INFO L78 Accepts]: Start accepts. Automaton has 4421 states and 18952 transitions. Word has length 23 [2022-03-01 17:52:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:12,999 INFO L470 AbstractCegarLoop]: Abstraction has 4421 states and 18952 transitions. [2022-03-01 17:52:12,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4421 states and 18952 transitions. [2022-03-01 17:52:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:13,007 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:13,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:13,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-03-01 17:52:13,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:13,208 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:13,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1920735254, now seen corresponding path program 74 times [2022-03-01 17:52:13,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:13,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446809512] [2022-03-01 17:52:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:13,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:13,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:13,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446809512] [2022-03-01 17:52:13,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446809512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:13,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785112062] [2022-03-01 17:52:13,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:52:13,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:13,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:13,375 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:13,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-01 17:52:13,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:13,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:13,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:13,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:13,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:13,576 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 21 treesize of output 37 [2022-03-01 17:52:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:13,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:14,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:14,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:14,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:14,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:14,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785112062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:14,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:14,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:52:14,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380296668] [2022-03-01 17:52:14,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:14,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:14,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:14,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:14,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:52:14,163 INFO L87 Difference]: Start difference. First operand 4421 states and 18952 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:15,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:15,550 INFO L93 Difference]: Finished difference Result 4933 states and 20931 transitions. [2022-03-01 17:52:15,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:52:15,550 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:52:15,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:15,562 INFO L225 Difference]: With dead ends: 4933 [2022-03-01 17:52:15,562 INFO L226 Difference]: Without dead ends: 4912 [2022-03-01 17:52:15,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=293, Invalid=1346, Unknown=1, NotChecked=0, Total=1640 [2022-03-01 17:52:15,563 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 190 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:15,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 563 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1389 Invalid, 0 Unknown, 114 Unchecked, 0.6s Time] [2022-03-01 17:52:15,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4912 states. [2022-03-01 17:52:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4912 to 4421. [2022-03-01 17:52:15,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4421 states, 4420 states have (on average 4.287782805429864) internal successors, (18952), 4420 states have internal predecessors, (18952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:15,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4421 states to 4421 states and 18952 transitions. [2022-03-01 17:52:15,640 INFO L78 Accepts]: Start accepts. Automaton has 4421 states and 18952 transitions. Word has length 23 [2022-03-01 17:52:15,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:15,640 INFO L470 AbstractCegarLoop]: Abstraction has 4421 states and 18952 transitions. [2022-03-01 17:52:15,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:15,640 INFO L276 IsEmpty]: Start isEmpty. Operand 4421 states and 18952 transitions. [2022-03-01 17:52:15,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:15,648 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:15,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:15,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-01 17:52:15,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-01 17:52:15,848 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:15,849 INFO L85 PathProgramCache]: Analyzing trace with hash 524828734, now seen corresponding path program 75 times [2022-03-01 17:52:15,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:15,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329156666] [2022-03-01 17:52:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:15,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:16,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:16,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329156666] [2022-03-01 17:52:16,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329156666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:16,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682027485] [2022-03-01 17:52:16,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:16,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:16,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:16,024 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:16,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-01 17:52:16,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:52:16,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:16,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:52:16,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:16,249 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:52:16,250 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 52 treesize of output 68 [2022-03-01 17:52:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:16,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:52:16,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682027485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:16,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:16,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-03-01 17:52:16,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822461257] [2022-03-01 17:52:16,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:16,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:16,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:16,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:52:16,593 INFO L87 Difference]: Start difference. First operand 4421 states and 18952 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 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) [2022-03-01 17:52:18,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:18,994 INFO L93 Difference]: Finished difference Result 6376 states and 26707 transitions. [2022-03-01 17:52:18,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 17:52:18,994 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 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 23 [2022-03-01 17:52:18,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:19,010 INFO L225 Difference]: With dead ends: 6376 [2022-03-01 17:52:19,011 INFO L226 Difference]: Without dead ends: 6303 [2022-03-01 17:52:19,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=563, Invalid=3859, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 17:52:19,011 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 479 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 2244 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:19,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 868 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2244 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 17:52:19,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6303 states. [2022-03-01 17:52:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6303 to 4553. [2022-03-01 17:52:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4552 states have (on average 4.292618629173989) internal successors, (19540), 4552 states have internal predecessors, (19540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 19540 transitions. [2022-03-01 17:52:19,095 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 19540 transitions. Word has length 23 [2022-03-01 17:52:19,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:19,096 INFO L470 AbstractCegarLoop]: Abstraction has 4553 states and 19540 transitions. [2022-03-01 17:52:19,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 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) [2022-03-01 17:52:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 19540 transitions. [2022-03-01 17:52:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:19,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:19,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:19,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-03-01 17:52:19,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-03-01 17:52:19,304 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:19,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:19,304 INFO L85 PathProgramCache]: Analyzing trace with hash 606227790, now seen corresponding path program 76 times [2022-03-01 17:52:19,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:19,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267891987] [2022-03-01 17:52:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:19,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:19,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:19,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267891987] [2022-03-01 17:52:19,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267891987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:19,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397224463] [2022-03-01 17:52:19,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:19,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:19,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:19,470 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:19,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-01 17:52:19,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:19,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:19,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:19,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:19,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:19,621 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 21 treesize of output 37 [2022-03-01 17:52:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:19,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:20,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:20,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:20,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:20,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:20,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397224463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:20,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:20,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:52:20,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561608034] [2022-03-01 17:52:20,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:20,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:20,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:20,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:20,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:52:20,174 INFO L87 Difference]: Start difference. First operand 4553 states and 19540 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:21,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:21,477 INFO L93 Difference]: Finished difference Result 5196 states and 22037 transitions. [2022-03-01 17:52:21,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:52:21,477 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:52:21,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:21,489 INFO L225 Difference]: With dead ends: 5196 [2022-03-01 17:52:21,489 INFO L226 Difference]: Without dead ends: 5170 [2022-03-01 17:52:21,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 17:52:21,490 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 270 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:21,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 536 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1423 Invalid, 0 Unknown, 121 Unchecked, 0.6s Time] [2022-03-01 17:52:21,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5170 states. [2022-03-01 17:52:21,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5170 to 4561. [2022-03-01 17:52:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 4.291228070175438) internal successors, (19568), 4560 states have internal predecessors, (19568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 19568 transitions. [2022-03-01 17:52:21,571 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 19568 transitions. Word has length 23 [2022-03-01 17:52:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:21,571 INFO L470 AbstractCegarLoop]: Abstraction has 4561 states and 19568 transitions. [2022-03-01 17:52:21,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 19568 transitions. [2022-03-01 17:52:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:21,580 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:21,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:21,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-01 17:52:21,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:21,780 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:21,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:21,780 INFO L85 PathProgramCache]: Analyzing trace with hash 241790372, now seen corresponding path program 77 times [2022-03-01 17:52:21,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:21,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675168643] [2022-03-01 17:52:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:21,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:21,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:21,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675168643] [2022-03-01 17:52:21,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675168643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:21,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062606311] [2022-03-01 17:52:21,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:21,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:21,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:21,939 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:21,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-01 17:52:21,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:21,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:21,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:21,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:22,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:22,128 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 20 treesize of output 36 [2022-03-01 17:52:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:22,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:22,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:22,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:22,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:22,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:22,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062606311] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:22,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:22,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:52:22,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877884914] [2022-03-01 17:52:22,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:22,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:22,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:22,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:22,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:52:22,673 INFO L87 Difference]: Start difference. First operand 4561 states and 19568 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:23,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:23,533 INFO L93 Difference]: Finished difference Result 4949 states and 21051 transitions. [2022-03-01 17:52:23,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:52:23,534 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:23,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:23,549 INFO L225 Difference]: With dead ends: 4949 [2022-03-01 17:52:23,549 INFO L226 Difference]: Without dead ends: 4927 [2022-03-01 17:52:23,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=1351, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:52:23,550 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 153 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:23,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 584 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1284 Invalid, 0 Unknown, 159 Unchecked, 0.5s Time] [2022-03-01 17:52:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4927 states. [2022-03-01 17:52:23,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4927 to 4569. [2022-03-01 17:52:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4569 states, 4568 states have (on average 4.2911558669001755) internal successors, (19602), 4568 states have internal predecessors, (19602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4569 states to 4569 states and 19602 transitions. [2022-03-01 17:52:23,632 INFO L78 Accepts]: Start accepts. Automaton has 4569 states and 19602 transitions. Word has length 23 [2022-03-01 17:52:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:23,632 INFO L470 AbstractCegarLoop]: Abstraction has 4569 states and 19602 transitions. [2022-03-01 17:52:23,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4569 states and 19602 transitions. [2022-03-01 17:52:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:23,640 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:23,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:23,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-01 17:52:23,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-01 17:52:23,841 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:23,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:23,841 INFO L85 PathProgramCache]: Analyzing trace with hash 827124324, now seen corresponding path program 78 times [2022-03-01 17:52:23,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:23,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554743847] [2022-03-01 17:52:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:23,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:24,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:24,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554743847] [2022-03-01 17:52:24,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554743847] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:24,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769814508] [2022-03-01 17:52:24,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:24,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:24,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:24,018 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:24,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-01 17:52:24,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:52:24,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:24,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:52:24,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:24,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:24,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:24,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:24,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2022-03-01 17:52:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:24,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:24,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:24,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:24,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:24,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:24,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769814508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:24,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:24,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:52:24,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493029643] [2022-03-01 17:52:24,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:24,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:52:24,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:24,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:52:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:52:24,693 INFO L87 Difference]: Start difference. First operand 4569 states and 19602 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:26,043 INFO L93 Difference]: Finished difference Result 5014 states and 21283 transitions. [2022-03-01 17:52:26,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:52:26,044 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:26,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:26,056 INFO L225 Difference]: With dead ends: 5014 [2022-03-01 17:52:26,056 INFO L226 Difference]: Without dead ends: 4962 [2022-03-01 17:52:26,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:52:26,057 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 159 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:26,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 694 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1744 Invalid, 0 Unknown, 138 Unchecked, 0.7s Time] [2022-03-01 17:52:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2022-03-01 17:52:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 4565. [2022-03-01 17:52:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 4.290972830850132) internal successors, (19584), 4564 states have internal predecessors, (19584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 19584 transitions. [2022-03-01 17:52:26,133 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 19584 transitions. Word has length 23 [2022-03-01 17:52:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:26,134 INFO L470 AbstractCegarLoop]: Abstraction has 4565 states and 19584 transitions. [2022-03-01 17:52:26,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 19584 transitions. [2022-03-01 17:52:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:26,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:26,141 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:26,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-01 17:52:26,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:26,342 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:26,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:26,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1854276238, now seen corresponding path program 79 times [2022-03-01 17:52:26,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:26,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786761146] [2022-03-01 17:52:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:26,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:26,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:26,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786761146] [2022-03-01 17:52:26,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786761146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:26,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619471492] [2022-03-01 17:52:26,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:26,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:26,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:26,502 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:26,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-01 17:52:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:26,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:26,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:26,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:26,672 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 21 treesize of output 37 [2022-03-01 17:52:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:27,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:27,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:27,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:27,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:27,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:27,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619471492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:27,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:27,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:52:27,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353077785] [2022-03-01 17:52:27,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:27,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:27,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:27,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:27,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:52:27,270 INFO L87 Difference]: Start difference. First operand 4565 states and 19584 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:28,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:28,535 INFO L93 Difference]: Finished difference Result 4965 states and 21118 transitions. [2022-03-01 17:52:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:52:28,535 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:52:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:28,547 INFO L225 Difference]: With dead ends: 4965 [2022-03-01 17:52:28,547 INFO L226 Difference]: Without dead ends: 4944 [2022-03-01 17:52:28,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=1680, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:52:28,548 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 194 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:28,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 572 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1566 Invalid, 0 Unknown, 187 Unchecked, 0.7s Time] [2022-03-01 17:52:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4944 states. [2022-03-01 17:52:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4944 to 4565. [2022-03-01 17:52:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 4.290972830850132) internal successors, (19584), 4564 states have internal predecessors, (19584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 19584 transitions. [2022-03-01 17:52:28,630 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 19584 transitions. Word has length 23 [2022-03-01 17:52:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:28,630 INFO L470 AbstractCegarLoop]: Abstraction has 4565 states and 19584 transitions. [2022-03-01 17:52:28,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:28,630 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 19584 transitions. [2022-03-01 17:52:28,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:28,638 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:28,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:28,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-03-01 17:52:28,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-03-01 17:52:28,839 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:28,839 INFO L85 PathProgramCache]: Analyzing trace with hash 396227890, now seen corresponding path program 80 times [2022-03-01 17:52:28,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:28,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894078115] [2022-03-01 17:52:28,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:28,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:28,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:28,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894078115] [2022-03-01 17:52:28,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894078115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:28,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365778764] [2022-03-01 17:52:28,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:52:28,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:28,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:28,990 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:28,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-01 17:52:29,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:29,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:29,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:29,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:29,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:29,181 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 20 treesize of output 36 [2022-03-01 17:52:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:29,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:29,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:29,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:29,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:29,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:29,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365778764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:29,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:29,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:52:29,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969522130] [2022-03-01 17:52:29,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:29,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:29,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:29,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:29,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:52:29,704 INFO L87 Difference]: Start difference. First operand 4565 states and 19584 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:30,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:30,426 INFO L93 Difference]: Finished difference Result 4903 states and 20882 transitions. [2022-03-01 17:52:30,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:52:30,426 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:30,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:30,438 INFO L225 Difference]: With dead ends: 4903 [2022-03-01 17:52:30,438 INFO L226 Difference]: Without dead ends: 4880 [2022-03-01 17:52:30,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:52:30,438 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 166 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:30,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 511 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1212 Invalid, 0 Unknown, 150 Unchecked, 0.5s Time] [2022-03-01 17:52:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4880 states. [2022-03-01 17:52:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4880 to 4569. [2022-03-01 17:52:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4569 states, 4568 states have (on average 4.2907180385288965) internal successors, (19600), 4568 states have internal predecessors, (19600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4569 states to 4569 states and 19600 transitions. [2022-03-01 17:52:30,534 INFO L78 Accepts]: Start accepts. Automaton has 4569 states and 19600 transitions. Word has length 23 [2022-03-01 17:52:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:30,534 INFO L470 AbstractCegarLoop]: Abstraction has 4569 states and 19600 transitions. [2022-03-01 17:52:30,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4569 states and 19600 transitions. [2022-03-01 17:52:30,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:30,543 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:30,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:30,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-03-01 17:52:30,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:30,743 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:30,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1860076704, now seen corresponding path program 81 times [2022-03-01 17:52:30,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:30,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134758612] [2022-03-01 17:52:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:30,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:30,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:30,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134758612] [2022-03-01 17:52:30,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134758612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:30,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999092174] [2022-03-01 17:52:30,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:30,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:30,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:30,919 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:30,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-01 17:52:30,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:52:30,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:30,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:52:30,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:31,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:31,128 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 53 [2022-03-01 17:52:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:31,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:31,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:31,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:31,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:31,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:31,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999092174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:31,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:31,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:52:31,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480744604] [2022-03-01 17:52:31,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:31,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:52:31,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:31,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:52:31,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:52:31,407 INFO L87 Difference]: Start difference. First operand 4569 states and 19600 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:32,278 INFO L93 Difference]: Finished difference Result 4818 states and 20547 transitions. [2022-03-01 17:52:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:52:32,278 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:32,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:32,290 INFO L225 Difference]: With dead ends: 4818 [2022-03-01 17:52:32,290 INFO L226 Difference]: Without dead ends: 4796 [2022-03-01 17:52:32,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:52:32,291 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 137 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:32,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 532 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1271 Invalid, 0 Unknown, 261 Unchecked, 0.5s Time] [2022-03-01 17:52:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4796 states. [2022-03-01 17:52:32,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4796 to 4569. [2022-03-01 17:52:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4569 states, 4568 states have (on average 4.2907180385288965) internal successors, (19600), 4568 states have internal predecessors, (19600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4569 states to 4569 states and 19600 transitions. [2022-03-01 17:52:32,367 INFO L78 Accepts]: Start accepts. Automaton has 4569 states and 19600 transitions. Word has length 23 [2022-03-01 17:52:32,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:32,367 INFO L470 AbstractCegarLoop]: Abstraction has 4569 states and 19600 transitions. [2022-03-01 17:52:32,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:32,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4569 states and 19600 transitions. [2022-03-01 17:52:32,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:32,375 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:32,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:32,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:32,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:32,575 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:32,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:32,575 INFO L85 PathProgramCache]: Analyzing trace with hash -564656732, now seen corresponding path program 82 times [2022-03-01 17:52:32,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:32,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737891951] [2022-03-01 17:52:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:32,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:32,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:32,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737891951] [2022-03-01 17:52:32,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737891951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:32,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155166400] [2022-03-01 17:52:32,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:32,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:32,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:32,749 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:32,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-01 17:52:32,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:32,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:32,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:32,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:32,909 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 25 treesize of output 41 [2022-03-01 17:52:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:35,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:35,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:35,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:35,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:35,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:35,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155166400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:35,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:35,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:52:35,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930408035] [2022-03-01 17:52:35,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:35,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:35,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:35,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=563, Unknown=1, NotChecked=0, Total=650 [2022-03-01 17:52:35,549 INFO L87 Difference]: Start difference. First operand 4569 states and 19600 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:36,614 INFO L93 Difference]: Finished difference Result 4902 states and 20873 transitions. [2022-03-01 17:52:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:52:36,614 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:36,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:36,626 INFO L225 Difference]: With dead ends: 4902 [2022-03-01 17:52:36,626 INFO L226 Difference]: Without dead ends: 4876 [2022-03-01 17:52:36,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=272, Invalid=1367, Unknown=1, NotChecked=0, Total=1640 [2022-03-01 17:52:36,627 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 209 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:36,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 372 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1045 Invalid, 0 Unknown, 105 Unchecked, 0.5s Time] [2022-03-01 17:52:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2022-03-01 17:52:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 4576. [2022-03-01 17:52:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.289398907103825) internal successors, (19624), 4575 states have internal predecessors, (19624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:36,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 19624 transitions. [2022-03-01 17:52:36,700 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 19624 transitions. Word has length 23 [2022-03-01 17:52:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:36,700 INFO L470 AbstractCegarLoop]: Abstraction has 4576 states and 19624 transitions. [2022-03-01 17:52:36,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 19624 transitions. [2022-03-01 17:52:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:36,707 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:36,707 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:36,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-03-01 17:52:36,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2022-03-01 17:52:36,908 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:36,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:36,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1606232800, now seen corresponding path program 83 times [2022-03-01 17:52:36,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:36,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642274475] [2022-03-01 17:52:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:36,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:37,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:37,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642274475] [2022-03-01 17:52:37,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642274475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:37,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341257894] [2022-03-01 17:52:37,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:37,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:37,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:37,082 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:37,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-01 17:52:37,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:52:37,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:37,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:52:37,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:37,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:37,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-03-01 17:52:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:37,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:37,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:37,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:37,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:37,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:37,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341257894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:37,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:37,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:52:37,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410241499] [2022-03-01 17:52:37,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:37,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:52:37,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:37,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:52:37,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:52:37,641 INFO L87 Difference]: Start difference. First operand 4576 states and 19624 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:38,622 INFO L93 Difference]: Finished difference Result 4847 states and 20648 transitions. [2022-03-01 17:52:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:52:38,623 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:38,634 INFO L225 Difference]: With dead ends: 4847 [2022-03-01 17:52:38,635 INFO L226 Difference]: Without dead ends: 4819 [2022-03-01 17:52:38,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:52:38,635 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 119 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:38,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 362 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:52:38,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4819 states. [2022-03-01 17:52:38,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4819 to 4569. [2022-03-01 17:52:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4569 states, 4568 states have (on average 4.2907180385288965) internal successors, (19600), 4568 states have internal predecessors, (19600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:38,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4569 states to 4569 states and 19600 transitions. [2022-03-01 17:52:38,708 INFO L78 Accepts]: Start accepts. Automaton has 4569 states and 19600 transitions. Word has length 23 [2022-03-01 17:52:38,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:38,708 INFO L470 AbstractCegarLoop]: Abstraction has 4569 states and 19600 transitions. [2022-03-01 17:52:38,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:38,708 INFO L276 IsEmpty]: Start isEmpty. Operand 4569 states and 19600 transitions. [2022-03-01 17:52:38,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:38,716 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:38,716 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:38,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-03-01 17:52:38,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:38,916 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:38,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1893354152, now seen corresponding path program 84 times [2022-03-01 17:52:38,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:38,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087899958] [2022-03-01 17:52:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:38,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:39,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:39,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087899958] [2022-03-01 17:52:39,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087899958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:39,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960489134] [2022-03-01 17:52:39,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:39,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:39,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:39,089 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:39,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-01 17:52:39,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:52:39,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:39,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:39,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:39,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:39,246 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 21 treesize of output 37 [2022-03-01 17:52:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:39,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:39,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:39,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:39,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:39,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:39,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960489134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:39,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:39,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:52:39,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532523402] [2022-03-01 17:52:39,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:39,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:39,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:39,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:39,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:52:39,864 INFO L87 Difference]: Start difference. First operand 4569 states and 19600 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:40,940 INFO L93 Difference]: Finished difference Result 4914 states and 20927 transitions. [2022-03-01 17:52:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:52:40,940 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:40,952 INFO L225 Difference]: With dead ends: 4914 [2022-03-01 17:52:40,952 INFO L226 Difference]: Without dead ends: 4888 [2022-03-01 17:52:40,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:52:40,953 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 211 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:40,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 401 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1070 Invalid, 0 Unknown, 106 Unchecked, 0.5s Time] [2022-03-01 17:52:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4888 states. [2022-03-01 17:52:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4888 to 4569. [2022-03-01 17:52:41,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4569 states, 4568 states have (on average 4.2907180385288965) internal successors, (19600), 4568 states have internal predecessors, (19600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4569 states to 4569 states and 19600 transitions. [2022-03-01 17:52:41,028 INFO L78 Accepts]: Start accepts. Automaton has 4569 states and 19600 transitions. Word has length 23 [2022-03-01 17:52:41,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:41,029 INFO L470 AbstractCegarLoop]: Abstraction has 4569 states and 19600 transitions. [2022-03-01 17:52:41,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:41,029 INFO L276 IsEmpty]: Start isEmpty. Operand 4569 states and 19600 transitions. [2022-03-01 17:52:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:41,037 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:41,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:41,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-03-01 17:52:41,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:41,237 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:41,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1908395758, now seen corresponding path program 85 times [2022-03-01 17:52:41,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:41,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785828533] [2022-03-01 17:52:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:41,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:41,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:41,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785828533] [2022-03-01 17:52:41,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785828533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:41,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573985392] [2022-03-01 17:52:41,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:41,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:41,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:41,414 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:41,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-01 17:52:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:41,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:41,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:41,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:41,564 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 21 treesize of output 37 [2022-03-01 17:52:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:42,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:42,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:42,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:42,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:42,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:42,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573985392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:42,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:42,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:52:42,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701718343] [2022-03-01 17:52:42,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:42,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:42,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:42,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:42,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:52:42,494 INFO L87 Difference]: Start difference. First operand 4569 states and 19600 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:43,606 INFO L93 Difference]: Finished difference Result 4907 states and 20899 transitions. [2022-03-01 17:52:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:52:43,606 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:52:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:43,618 INFO L225 Difference]: With dead ends: 4907 [2022-03-01 17:52:43,618 INFO L226 Difference]: Without dead ends: 4886 [2022-03-01 17:52:43,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:52:43,618 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 170 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:43,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 449 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1303 Invalid, 0 Unknown, 113 Unchecked, 0.6s Time] [2022-03-01 17:52:43,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4886 states. [2022-03-01 17:52:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4886 to 4567. [2022-03-01 17:52:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4567 states, 4566 states have (on average 4.290845378887429) internal successors, (19592), 4566 states have internal predecessors, (19592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4567 states to 4567 states and 19592 transitions. [2022-03-01 17:52:43,693 INFO L78 Accepts]: Start accepts. Automaton has 4567 states and 19592 transitions. Word has length 23 [2022-03-01 17:52:43,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:43,693 INFO L470 AbstractCegarLoop]: Abstraction has 4567 states and 19592 transitions. [2022-03-01 17:52:43,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:43,693 INFO L276 IsEmpty]: Start isEmpty. Operand 4567 states and 19592 transitions. [2022-03-01 17:52:43,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:43,702 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:43,702 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:43,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:43,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:43,902 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:43,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:43,902 INFO L85 PathProgramCache]: Analyzing trace with hash -721141010, now seen corresponding path program 86 times [2022-03-01 17:52:43,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:43,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466868195] [2022-03-01 17:52:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:43,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:44,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:44,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466868195] [2022-03-01 17:52:44,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466868195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:44,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612747584] [2022-03-01 17:52:44,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:52:44,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:44,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:44,057 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:44,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-01 17:52:44,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:44,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:44,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:44,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:44,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:44,258 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 22 treesize of output 38 [2022-03-01 17:52:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:44,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:44,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:44,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:44,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:44,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:44,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612747584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:44,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:44,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:52:44,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018051531] [2022-03-01 17:52:44,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:44,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:44,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:44,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:44,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:52:44,782 INFO L87 Difference]: Start difference. First operand 4567 states and 19592 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:45,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:45,843 INFO L93 Difference]: Finished difference Result 4805 states and 20492 transitions. [2022-03-01 17:52:45,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:52:45,843 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:45,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:45,855 INFO L225 Difference]: With dead ends: 4805 [2022-03-01 17:52:45,855 INFO L226 Difference]: Without dead ends: 4782 [2022-03-01 17:52:45,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=1092, Unknown=1, NotChecked=0, Total=1260 [2022-03-01 17:52:45,856 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 118 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:45,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 583 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1462 Invalid, 0 Unknown, 43 Unchecked, 0.6s Time] [2022-03-01 17:52:45,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4782 states. [2022-03-01 17:52:45,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4782 to 4563. [2022-03-01 17:52:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 4.291100394563788) internal successors, (19576), 4562 states have internal predecessors, (19576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:45,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 19576 transitions. [2022-03-01 17:52:45,968 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 19576 transitions. Word has length 23 [2022-03-01 17:52:45,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:45,968 INFO L470 AbstractCegarLoop]: Abstraction has 4563 states and 19576 transitions. [2022-03-01 17:52:45,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:45,969 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 19576 transitions. [2022-03-01 17:52:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:45,976 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:45,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:45,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:46,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-03-01 17:52:46,177 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:46,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:46,177 INFO L85 PathProgramCache]: Analyzing trace with hash -49323858, now seen corresponding path program 87 times [2022-03-01 17:52:46,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:46,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511717737] [2022-03-01 17:52:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:46,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:46,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:46,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511717737] [2022-03-01 17:52:46,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511717737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:46,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649344307] [2022-03-01 17:52:46,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:46,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:46,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:46,339 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:46,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-01 17:52:46,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:52:46,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:46,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:46,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:46,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:46,527 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 20 treesize of output 36 [2022-03-01 17:52:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:46,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:47,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:47,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:47,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:47,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:47,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649344307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:47,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:47,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:52:47,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416736577] [2022-03-01 17:52:47,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:47,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:47,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:47,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:47,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:52:47,070 INFO L87 Difference]: Start difference. First operand 4563 states and 19576 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:48,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:48,210 INFO L93 Difference]: Finished difference Result 4866 states and 20731 transitions. [2022-03-01 17:52:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:52:48,211 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:48,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:48,222 INFO L225 Difference]: With dead ends: 4866 [2022-03-01 17:52:48,222 INFO L226 Difference]: Without dead ends: 4844 [2022-03-01 17:52:48,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:52:48,223 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 197 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:48,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 591 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1517 Invalid, 0 Unknown, 50 Unchecked, 0.7s Time] [2022-03-01 17:52:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2022-03-01 17:52:48,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 4563. [2022-03-01 17:52:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 4.291100394563788) internal successors, (19576), 4562 states have internal predecessors, (19576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 19576 transitions. [2022-03-01 17:52:48,299 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 19576 transitions. Word has length 23 [2022-03-01 17:52:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:48,299 INFO L470 AbstractCegarLoop]: Abstraction has 4563 states and 19576 transitions. [2022-03-01 17:52:48,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 19576 transitions. [2022-03-01 17:52:48,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:48,307 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:48,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:48,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-03-01 17:52:48,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-01 17:52:48,508 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:48,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:48,508 INFO L85 PathProgramCache]: Analyzing trace with hash 464202994, now seen corresponding path program 88 times [2022-03-01 17:52:48,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:48,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565399175] [2022-03-01 17:52:48,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:48,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:48,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:48,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565399175] [2022-03-01 17:52:48,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565399175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:48,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365129890] [2022-03-01 17:52:48,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:48,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:48,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:48,665 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:48,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-01 17:52:48,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:48,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:48,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:48,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:48,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:48,853 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 25 treesize of output 41 [2022-03-01 17:52:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:49,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:49,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:49,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:49,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:49,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:49,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365129890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:49,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:49,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:52:49,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402925618] [2022-03-01 17:52:49,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:49,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:52:49,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:49,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:52:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:52:49,451 INFO L87 Difference]: Start difference. First operand 4563 states and 19576 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:50,427 INFO L93 Difference]: Finished difference Result 4841 states and 20615 transitions. [2022-03-01 17:52:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:52:50,428 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:50,440 INFO L225 Difference]: With dead ends: 4841 [2022-03-01 17:52:50,440 INFO L226 Difference]: Without dead ends: 4816 [2022-03-01 17:52:50,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:52:50,440 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 129 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:50,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 570 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1442 Invalid, 0 Unknown, 208 Unchecked, 0.6s Time] [2022-03-01 17:52:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4816 states. [2022-03-01 17:52:50,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4816 to 4555. [2022-03-01 17:52:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 4.291172595520422) internal successors, (19542), 4554 states have internal predecessors, (19542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 19542 transitions. [2022-03-01 17:52:50,519 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 19542 transitions. Word has length 23 [2022-03-01 17:52:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:50,519 INFO L470 AbstractCegarLoop]: Abstraction has 4555 states and 19542 transitions. [2022-03-01 17:52:50,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 19542 transitions. [2022-03-01 17:52:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:50,528 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:50,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:50,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-03-01 17:52:50,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:50,729 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:50,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:50,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1710729082, now seen corresponding path program 89 times [2022-03-01 17:52:50,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:50,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400407065] [2022-03-01 17:52:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:50,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:50,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:50,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400407065] [2022-03-01 17:52:50,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400407065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:50,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351297954] [2022-03-01 17:52:50,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:50,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:50,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:50,893 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:50,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-01 17:52:50,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:50,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:50,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:50,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:51,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:51,092 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 22 treesize of output 38 [2022-03-01 17:52:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:51,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:51,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:51,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:51,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:51,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:51,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351297954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:51,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:51,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:52:51,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287339261] [2022-03-01 17:52:51,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:51,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:52:51,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:51,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:52:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:52:51,646 INFO L87 Difference]: Start difference. First operand 4555 states and 19542 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:52,365 INFO L93 Difference]: Finished difference Result 4785 states and 20411 transitions. [2022-03-01 17:52:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:52:52,365 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:52,376 INFO L225 Difference]: With dead ends: 4785 [2022-03-01 17:52:52,377 INFO L226 Difference]: Without dead ends: 4762 [2022-03-01 17:52:52,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:52:52,377 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 129 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:52,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 509 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1272 Invalid, 0 Unknown, 98 Unchecked, 0.5s Time] [2022-03-01 17:52:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4762 states. [2022-03-01 17:52:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4762 to 4555. [2022-03-01 17:52:52,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 4.291172595520422) internal successors, (19542), 4554 states have internal predecessors, (19542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 19542 transitions. [2022-03-01 17:52:52,451 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 19542 transitions. Word has length 23 [2022-03-01 17:52:52,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:52,451 INFO L470 AbstractCegarLoop]: Abstraction has 4555 states and 19542 transitions. [2022-03-01 17:52:52,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:52,451 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 19542 transitions. [2022-03-01 17:52:52,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:52,458 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:52,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:52,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:52,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2022-03-01 17:52:52,659 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:52,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:52,659 INFO L85 PathProgramCache]: Analyzing trace with hash 610154488, now seen corresponding path program 27 times [2022-03-01 17:52:52,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:52,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362963126] [2022-03-01 17:52:52,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:52,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:52,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:52,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362963126] [2022-03-01 17:52:52,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362963126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:52,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633345280] [2022-03-01 17:52:52,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:52,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:52,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:52,776 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:52,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-01 17:52:52,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:52:52,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:52,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:52,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:52,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:52,958 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 22 treesize of output 38 [2022-03-01 17:52:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:53,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:53,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:53,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:53,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:53,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:53,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633345280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:53,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:53,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:52:53,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492042351] [2022-03-01 17:52:53,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:53,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:52:53,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:53,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:52:53,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:52:53,453 INFO L87 Difference]: Start difference. First operand 4555 states and 19542 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:54,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:54,399 INFO L93 Difference]: Finished difference Result 5587 states and 23570 transitions. [2022-03-01 17:52:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:52:54,399 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:54,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:54,412 INFO L225 Difference]: With dead ends: 5587 [2022-03-01 17:52:54,413 INFO L226 Difference]: Without dead ends: 5544 [2022-03-01 17:52:54,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:52:54,413 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 263 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:54,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 639 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1484 Invalid, 0 Unknown, 72 Unchecked, 0.6s Time] [2022-03-01 17:52:54,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5544 states. [2022-03-01 17:52:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5544 to 4561. [2022-03-01 17:52:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 4.291447368421053) internal successors, (19569), 4560 states have internal predecessors, (19569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:54,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 19569 transitions. [2022-03-01 17:52:54,498 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 19569 transitions. Word has length 23 [2022-03-01 17:52:54,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:54,498 INFO L470 AbstractCegarLoop]: Abstraction has 4561 states and 19569 transitions. [2022-03-01 17:52:54,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 19569 transitions. [2022-03-01 17:52:54,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:54,506 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:54,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:54,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-03-01 17:52:54,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:54,707 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:54,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:54,707 INFO L85 PathProgramCache]: Analyzing trace with hash -296006472, now seen corresponding path program 28 times [2022-03-01 17:52:54,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:54,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760391751] [2022-03-01 17:52:54,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:54,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:54,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:54,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760391751] [2022-03-01 17:52:54,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760391751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:54,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433537339] [2022-03-01 17:52:54,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:54,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:54,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:54,832 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:54,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-01 17:52:54,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:54,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:54,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:54,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:54,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:54,990 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 21 treesize of output 37 [2022-03-01 17:52:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:55,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:55,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:55,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:55,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:55,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:55,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433537339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:55,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:55,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:52:55,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611541108] [2022-03-01 17:52:55,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:55,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:52:55,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:55,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:52:55,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:52:55,556 INFO L87 Difference]: Start difference. First operand 4561 states and 19569 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:56,499 INFO L93 Difference]: Finished difference Result 5501 states and 23253 transitions. [2022-03-01 17:52:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:52:56,499 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:56,512 INFO L225 Difference]: With dead ends: 5501 [2022-03-01 17:52:56,513 INFO L226 Difference]: Without dead ends: 5473 [2022-03-01 17:52:56,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:52:56,513 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 341 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:56,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 561 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1323 Invalid, 0 Unknown, 80 Unchecked, 0.5s Time] [2022-03-01 17:52:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2022-03-01 17:52:56,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 4565. [2022-03-01 17:52:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 4.2916301489921125) internal successors, (19587), 4564 states have internal predecessors, (19587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 19587 transitions. [2022-03-01 17:52:56,622 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 19587 transitions. Word has length 23 [2022-03-01 17:52:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:56,622 INFO L470 AbstractCegarLoop]: Abstraction has 4565 states and 19587 transitions. [2022-03-01 17:52:56,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 19587 transitions. [2022-03-01 17:52:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:56,630 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:56,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:56,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:56,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:56,839 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:56,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:56,840 INFO L85 PathProgramCache]: Analyzing trace with hash 779704684, now seen corresponding path program 29 times [2022-03-01 17:52:56,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:56,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287926055] [2022-03-01 17:52:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:56,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:56,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:56,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287926055] [2022-03-01 17:52:56,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287926055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:56,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890680589] [2022-03-01 17:52:56,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:56,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:56,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:56,967 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:56,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-01 17:52:56,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:52:56,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:56,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:56,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:57,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:57,126 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 21 treesize of output 37 [2022-03-01 17:52:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:57,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:57,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:57,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:57,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:57,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:57,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890680589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:57,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:57,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:52:57,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409627546] [2022-03-01 17:52:57,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:57,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:52:57,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:57,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:52:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:52:57,711 INFO L87 Difference]: Start difference. First operand 4565 states and 19587 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:58,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:58,741 INFO L93 Difference]: Finished difference Result 5595 states and 23620 transitions. [2022-03-01 17:52:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:52:58,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:52:58,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:58,755 INFO L225 Difference]: With dead ends: 5595 [2022-03-01 17:52:58,755 INFO L226 Difference]: Without dead ends: 5572 [2022-03-01 17:52:58,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=1442, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:52:58,756 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 322 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:58,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 475 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1143 Invalid, 0 Unknown, 131 Unchecked, 0.5s Time] [2022-03-01 17:52:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5572 states. [2022-03-01 17:52:58,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5572 to 4557. [2022-03-01 17:52:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4556 states have (on average 4.29126426690079) internal successors, (19551), 4556 states have internal predecessors, (19551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 19551 transitions. [2022-03-01 17:52:58,837 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 19551 transitions. Word has length 23 [2022-03-01 17:52:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:58,837 INFO L470 AbstractCegarLoop]: Abstraction has 4557 states and 19551 transitions. [2022-03-01 17:52:58,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:58,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 19551 transitions. [2022-03-01 17:52:58,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:52:58,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:58,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:58,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:59,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:59,064 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:52:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:59,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1032690948, now seen corresponding path program 30 times [2022-03-01 17:52:59,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:59,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651473652] [2022-03-01 17:52:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:59,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:59,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:59,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651473652] [2022-03-01 17:52:59,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651473652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:59,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877717983] [2022-03-01 17:52:59,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:59,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:59,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:59,194 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:59,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-01 17:52:59,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:52:59,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:59,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:52:59,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:59,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:59,350 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 21 treesize of output 37 [2022-03-01 17:52:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:59,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:59,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:59,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:59,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:59,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:52:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:59,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877717983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:59,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:59,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:52:59,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102724335] [2022-03-01 17:52:59,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:59,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:52:59,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:59,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:52:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:52:59,891 INFO L87 Difference]: Start difference. First operand 4557 states and 19551 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:00,930 INFO L93 Difference]: Finished difference Result 5471 states and 23129 transitions. [2022-03-01 17:53:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:53:00,930 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:00,944 INFO L225 Difference]: With dead ends: 5471 [2022-03-01 17:53:00,944 INFO L226 Difference]: Without dead ends: 5443 [2022-03-01 17:53:00,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=1242, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:53:00,945 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 264 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:00,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 602 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1548 Invalid, 0 Unknown, 201 Unchecked, 0.6s Time] [2022-03-01 17:53:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5443 states. [2022-03-01 17:53:01,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5443 to 4563. [2022-03-01 17:53:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 4.290881192459447) internal successors, (19575), 4562 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 19575 transitions. [2022-03-01 17:53:01,032 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 19575 transitions. Word has length 23 [2022-03-01 17:53:01,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:01,033 INFO L470 AbstractCegarLoop]: Abstraction has 4563 states and 19575 transitions. [2022-03-01 17:53:01,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 19575 transitions. [2022-03-01 17:53:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:01,042 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:01,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:01,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-03-01 17:53:01,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:01,242 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:01,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2108402104, now seen corresponding path program 31 times [2022-03-01 17:53:01,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:01,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870413605] [2022-03-01 17:53:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:01,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:01,376 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:01,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870413605] [2022-03-01 17:53:01,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870413605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:01,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220264448] [2022-03-01 17:53:01,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:01,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:01,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:01,377 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:01,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-01 17:53:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:01,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:01,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:01,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:01,529 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 21 treesize of output 37 [2022-03-01 17:53:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:01,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:02,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:02,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:02,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:02,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:02,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220264448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:02,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:02,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:53:02,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214197043] [2022-03-01 17:53:02,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:02,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:02,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:02,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:02,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:02,141 INFO L87 Difference]: Start difference. First operand 4563 states and 19575 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:03,116 INFO L93 Difference]: Finished difference Result 5519 states and 23331 transitions. [2022-03-01 17:53:03,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:53:03,116 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:03,129 INFO L225 Difference]: With dead ends: 5519 [2022-03-01 17:53:03,129 INFO L226 Difference]: Without dead ends: 5496 [2022-03-01 17:53:03,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:53:03,129 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 276 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:03,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 435 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1038 Invalid, 0 Unknown, 247 Unchecked, 0.5s Time] [2022-03-01 17:53:03,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2022-03-01 17:53:03,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 4571. [2022-03-01 17:53:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4570 states have (on average 4.290809628008753) internal successors, (19609), 4570 states have internal predecessors, (19609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 19609 transitions. [2022-03-01 17:53:03,207 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 19609 transitions. Word has length 23 [2022-03-01 17:53:03,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:03,207 INFO L470 AbstractCegarLoop]: Abstraction has 4571 states and 19609 transitions. [2022-03-01 17:53:03,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:03,207 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 19609 transitions. [2022-03-01 17:53:03,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:03,214 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:03,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:03,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:03,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:03,414 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:03,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:03,415 INFO L85 PathProgramCache]: Analyzing trace with hash 436075832, now seen corresponding path program 32 times [2022-03-01 17:53:03,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:03,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875624588] [2022-03-01 17:53:03,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:03,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:03,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:03,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:03,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875624588] [2022-03-01 17:53:03,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875624588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:03,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18844843] [2022-03-01 17:53:03,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:03,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:03,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:03,534 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:03,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-01 17:53:03,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:03,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:03,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:03,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:03,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:03,716 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 22 treesize of output 38 [2022-03-01 17:53:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:04,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:04,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:04,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:04,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:04,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:04,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18844843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:04,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:04,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:53:04,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714896694] [2022-03-01 17:53:04,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:04,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:04,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:04,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:04,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:04,229 INFO L87 Difference]: Start difference. First operand 4571 states and 19609 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:05,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:05,049 INFO L93 Difference]: Finished difference Result 5124 states and 21747 transitions. [2022-03-01 17:53:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:53:05,049 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:05,061 INFO L225 Difference]: With dead ends: 5124 [2022-03-01 17:53:05,061 INFO L226 Difference]: Without dead ends: 5090 [2022-03-01 17:53:05,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:53:05,061 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 184 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:05,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 508 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1397 Invalid, 0 Unknown, 149 Unchecked, 0.5s Time] [2022-03-01 17:53:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5090 states. [2022-03-01 17:53:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5090 to 4592. [2022-03-01 17:53:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4592 states, 4591 states have (on average 4.2892615987802225) internal successors, (19692), 4591 states have internal predecessors, (19692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4592 states to 4592 states and 19692 transitions. [2022-03-01 17:53:05,137 INFO L78 Accepts]: Start accepts. Automaton has 4592 states and 19692 transitions. Word has length 23 [2022-03-01 17:53:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:05,137 INFO L470 AbstractCegarLoop]: Abstraction has 4592 states and 19692 transitions. [2022-03-01 17:53:05,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 4592 states and 19692 transitions. [2022-03-01 17:53:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:05,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:05,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:05,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:05,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2022-03-01 17:53:05,345 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:05,346 INFO L85 PathProgramCache]: Analyzing trace with hash -892621588, now seen corresponding path program 33 times [2022-03-01 17:53:05,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:05,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270685577] [2022-03-01 17:53:05,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:05,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:05,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:05,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270685577] [2022-03-01 17:53:05,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270685577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:05,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770563773] [2022-03-01 17:53:05,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:05,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:05,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:05,468 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:05,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-01 17:53:05,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:53:05,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:05,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:05,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:05,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:05,660 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 22 treesize of output 38 [2022-03-01 17:53:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:05,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:06,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:06,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:06,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:06,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:06,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770563773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:06,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:06,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:53:06,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209172603] [2022-03-01 17:53:06,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:06,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:06,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:06,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:06,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:06,164 INFO L87 Difference]: Start difference. First operand 4592 states and 19692 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:06,997 INFO L93 Difference]: Finished difference Result 5235 states and 22184 transitions. [2022-03-01 17:53:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:53:06,997 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:07,010 INFO L225 Difference]: With dead ends: 5235 [2022-03-01 17:53:07,010 INFO L226 Difference]: Without dead ends: 5204 [2022-03-01 17:53:07,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:53:07,010 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 236 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:07,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 493 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1320 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-03-01 17:53:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2022-03-01 17:53:07,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 4598. [2022-03-01 17:53:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 4.289754187513596) internal successors, (19720), 4597 states have internal predecessors, (19720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 19720 transitions. [2022-03-01 17:53:07,107 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 19720 transitions. Word has length 23 [2022-03-01 17:53:07,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:07,107 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 19720 transitions. [2022-03-01 17:53:07,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:07,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 19720 transitions. [2022-03-01 17:53:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:07,115 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:07,115 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:07,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-03-01 17:53:07,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-01 17:53:07,316 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:07,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:07,316 INFO L85 PathProgramCache]: Analyzing trace with hash -304876266, now seen corresponding path program 34 times [2022-03-01 17:53:07,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:07,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107600949] [2022-03-01 17:53:07,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:07,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:07,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:07,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107600949] [2022-03-01 17:53:07,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107600949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:07,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422568818] [2022-03-01 17:53:07,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:07,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:07,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:07,480 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:07,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-01 17:53:07,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:07,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:07,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:07,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:07,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:07,651 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 25 treesize of output 41 [2022-03-01 17:53:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:07,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:08,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:08,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:08,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:08,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:08,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422568818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:08,193 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:08,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:53:08,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863288414] [2022-03-01 17:53:08,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:08,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:53:08,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:08,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:53:08,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:53:08,194 INFO L87 Difference]: Start difference. First operand 4598 states and 19720 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:09,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:09,283 INFO L93 Difference]: Finished difference Result 5369 states and 22695 transitions. [2022-03-01 17:53:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:53:09,283 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:09,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:09,298 INFO L225 Difference]: With dead ends: 5369 [2022-03-01 17:53:09,299 INFO L226 Difference]: Without dead ends: 5313 [2022-03-01 17:53:09,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:53:09,299 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 333 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:09,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 458 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1218 Invalid, 0 Unknown, 71 Unchecked, 0.6s Time] [2022-03-01 17:53:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2022-03-01 17:53:09,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 4628. [2022-03-01 17:53:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 4.289388372595634) internal successors, (19847), 4627 states have internal predecessors, (19847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 19847 transitions. [2022-03-01 17:53:09,434 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 19847 transitions. Word has length 23 [2022-03-01 17:53:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:09,434 INFO L470 AbstractCegarLoop]: Abstraction has 4628 states and 19847 transitions. [2022-03-01 17:53:09,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:09,434 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 19847 transitions. [2022-03-01 17:53:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:09,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:09,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:09,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:09,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-01 17:53:09,643 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:09,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:09,644 INFO L85 PathProgramCache]: Analyzing trace with hash 770834890, now seen corresponding path program 35 times [2022-03-01 17:53:09,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:09,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940976722] [2022-03-01 17:53:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:09,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:09,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:09,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940976722] [2022-03-01 17:53:09,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940976722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:09,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606087303] [2022-03-01 17:53:09,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:09,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:09,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:09,787 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:09,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-01 17:53:09,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:53:09,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:09,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:09,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:09,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:09,967 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 21 treesize of output 37 [2022-03-01 17:53:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:10,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:10,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:10,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:10,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:10,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:10,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606087303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:10,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:10,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:53:10,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325386444] [2022-03-01 17:53:10,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:10,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:53:10,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:53:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:53:10,638 INFO L87 Difference]: Start difference. First operand 4628 states and 19847 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:11,735 INFO L93 Difference]: Finished difference Result 5487 states and 23175 transitions. [2022-03-01 17:53:11,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:53:11,735 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:11,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:11,748 INFO L225 Difference]: With dead ends: 5487 [2022-03-01 17:53:11,748 INFO L226 Difference]: Without dead ends: 5441 [2022-03-01 17:53:11,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=260, Invalid=1546, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:53:11,749 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 265 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:11,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 522 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1208 Invalid, 0 Unknown, 307 Unchecked, 0.5s Time] [2022-03-01 17:53:11,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5441 states. [2022-03-01 17:53:11,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5441 to 4616. [2022-03-01 17:53:11,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 4.289274106175514) internal successors, (19795), 4615 states have internal predecessors, (19795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:11,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 19795 transitions. [2022-03-01 17:53:11,824 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 19795 transitions. Word has length 23 [2022-03-01 17:53:11,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:11,824 INFO L470 AbstractCegarLoop]: Abstraction has 4616 states and 19795 transitions. [2022-03-01 17:53:11,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:11,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 19795 transitions. [2022-03-01 17:53:11,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:11,832 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:11,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:11,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-03-01 17:53:12,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:12,035 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:12,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:12,036 INFO L85 PathProgramCache]: Analyzing trace with hash -473529126, now seen corresponding path program 36 times [2022-03-01 17:53:12,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:12,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411592564] [2022-03-01 17:53:12,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:12,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:12,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:12,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411592564] [2022-03-01 17:53:12,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411592564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:12,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990950997] [2022-03-01 17:53:12,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:12,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:12,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:12,201 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:12,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-01 17:53:12,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:53:12,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:12,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:53:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:12,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:12,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-03-01 17:53:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:12,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:12,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:12,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:12,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:12,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:12,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990950997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:12,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:12,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:53:12,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857269443] [2022-03-01 17:53:12,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:12,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:53:12,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:53:12,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:53:12,751 INFO L87 Difference]: Start difference. First operand 4616 states and 19795 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:13,665 INFO L93 Difference]: Finished difference Result 5053 states and 21452 transitions. [2022-03-01 17:53:13,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:53:13,665 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:13,678 INFO L225 Difference]: With dead ends: 5053 [2022-03-01 17:53:13,678 INFO L226 Difference]: Without dead ends: 5044 [2022-03-01 17:53:13,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:53:13,679 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 233 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:13,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 512 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1436 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:53:13,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2022-03-01 17:53:13,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 4672. [2022-03-01 17:53:13,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 4.290730036394776) internal successors, (20042), 4671 states have internal predecessors, (20042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 20042 transitions. [2022-03-01 17:53:13,760 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 20042 transitions. Word has length 23 [2022-03-01 17:53:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:13,760 INFO L470 AbstractCegarLoop]: Abstraction has 4672 states and 20042 transitions. [2022-03-01 17:53:13,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:13,760 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 20042 transitions. [2022-03-01 17:53:13,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:13,768 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:13,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:13,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-03-01 17:53:13,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:13,969 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:13,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:13,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1709009540, now seen corresponding path program 37 times [2022-03-01 17:53:13,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:13,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425768988] [2022-03-01 17:53:13,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:13,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:14,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:14,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425768988] [2022-03-01 17:53:14,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425768988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:14,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839801905] [2022-03-01 17:53:14,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:14,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:14,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:14,101 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:14,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-01 17:53:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:14,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:14,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:14,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:14,292 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 29 treesize of output 41 [2022-03-01 17:53:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:14,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:14,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:14,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:14,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:14,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:14,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839801905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:14,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:14,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:53:14,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86947192] [2022-03-01 17:53:14,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:14,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:53:14,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:14,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:53:14,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:53:14,850 INFO L87 Difference]: Start difference. First operand 4672 states and 20042 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:15,972 INFO L93 Difference]: Finished difference Result 5272 states and 22366 transitions. [2022-03-01 17:53:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:53:15,973 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:15,986 INFO L225 Difference]: With dead ends: 5272 [2022-03-01 17:53:15,987 INFO L226 Difference]: Without dead ends: 5263 [2022-03-01 17:53:15,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:53:15,987 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 204 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:15,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 490 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:53:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5263 states. [2022-03-01 17:53:16,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5263 to 4678. [2022-03-01 17:53:16,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 4.290357066495617) internal successors, (20066), 4677 states have internal predecessors, (20066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 20066 transitions. [2022-03-01 17:53:16,073 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 20066 transitions. Word has length 23 [2022-03-01 17:53:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:16,073 INFO L470 AbstractCegarLoop]: Abstraction has 4678 states and 20066 transitions. [2022-03-01 17:53:16,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 20066 transitions. [2022-03-01 17:53:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:16,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:16,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:16,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:16,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:16,282 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:16,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:16,282 INFO L85 PathProgramCache]: Analyzing trace with hash 380312120, now seen corresponding path program 38 times [2022-03-01 17:53:16,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:16,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330321939] [2022-03-01 17:53:16,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:16,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:16,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:16,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330321939] [2022-03-01 17:53:16,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330321939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:16,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814004257] [2022-03-01 17:53:16,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:16,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:16,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:16,405 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:16,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-01 17:53:16,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:16,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:16,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 17:53:16,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:16,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:16,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:16,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:16,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-03-01 17:53:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:16,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:16,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:16,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:16,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:16,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:53:16,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814004257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:16,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:16,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 20 [2022-03-01 17:53:16,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429381412] [2022-03-01 17:53:16,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:16,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:53:16,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:16,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:53:16,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:53:16,912 INFO L87 Difference]: Start difference. First operand 4678 states and 20066 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:18,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:18,557 INFO L93 Difference]: Finished difference Result 7424 states and 30874 transitions. [2022-03-01 17:53:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:53:18,558 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:18,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:18,576 INFO L225 Difference]: With dead ends: 7424 [2022-03-01 17:53:18,576 INFO L226 Difference]: Without dead ends: 7379 [2022-03-01 17:53:18,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=556, Invalid=2524, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:53:18,577 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 338 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:18,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 500 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:53:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7379 states. [2022-03-01 17:53:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7379 to 5003. [2022-03-01 17:53:18,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5003 states, 5002 states have (on average 4.318872451019592) internal successors, (21603), 5002 states have internal predecessors, (21603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5003 states to 5003 states and 21603 transitions. [2022-03-01 17:53:18,674 INFO L78 Accepts]: Start accepts. Automaton has 5003 states and 21603 transitions. Word has length 23 [2022-03-01 17:53:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:18,674 INFO L470 AbstractCegarLoop]: Abstraction has 5003 states and 21603 transitions. [2022-03-01 17:53:18,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 5003 states and 21603 transitions. [2022-03-01 17:53:18,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:18,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:18,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:18,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-01 17:53:18,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2022-03-01 17:53:18,883 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:18,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash 968057442, now seen corresponding path program 39 times [2022-03-01 17:53:18,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:18,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87773615] [2022-03-01 17:53:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:18,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:19,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:19,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87773615] [2022-03-01 17:53:19,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87773615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:19,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766102803] [2022-03-01 17:53:19,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:19,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:19,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:19,013 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:19,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-01 17:53:19,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:53:19,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:19,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 17:53:19,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:19,184 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 17:53:19,184 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 37 treesize of output 65 [2022-03-01 17:53:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:19,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:19,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766102803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:19,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:19,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:53:19,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996707955] [2022-03-01 17:53:19,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:19,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:53:19,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:19,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:53:19,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:53:19,791 INFO L87 Difference]: Start difference. First operand 5003 states and 21603 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:21,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:21,852 INFO L93 Difference]: Finished difference Result 6788 states and 28598 transitions. [2022-03-01 17:53:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 17:53:21,852 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:21,870 INFO L225 Difference]: With dead ends: 6788 [2022-03-01 17:53:21,871 INFO L226 Difference]: Without dead ends: 6742 [2022-03-01 17:53:21,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=548, Invalid=2874, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 17:53:21,871 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 549 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:21,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 547 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1242 Invalid, 0 Unknown, 260 Unchecked, 0.6s Time] [2022-03-01 17:53:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6742 states. [2022-03-01 17:53:21,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6742 to 5201. [2022-03-01 17:53:21,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5201 states, 5200 states have (on average 4.329807692307693) internal successors, (22515), 5200 states have internal predecessors, (22515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5201 states to 5201 states and 22515 transitions. [2022-03-01 17:53:21,983 INFO L78 Accepts]: Start accepts. Automaton has 5201 states and 22515 transitions. Word has length 23 [2022-03-01 17:53:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:21,983 INFO L470 AbstractCegarLoop]: Abstraction has 5201 states and 22515 transitions. [2022-03-01 17:53:21,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 5201 states and 22515 transitions. [2022-03-01 17:53:21,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:21,992 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:21,992 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:22,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-03-01 17:53:22,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-03-01 17:53:22,192 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:22,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2043768598, now seen corresponding path program 40 times [2022-03-01 17:53:22,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:22,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725376360] [2022-03-01 17:53:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:22,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:22,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:22,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725376360] [2022-03-01 17:53:22,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725376360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:22,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787935257] [2022-03-01 17:53:22,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:22,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:22,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:22,325 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:22,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-01 17:53:22,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:22,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:22,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:22,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:22,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:22,500 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 26 treesize of output 40 [2022-03-01 17:53:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:22,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:23,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:23,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:23,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:23,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:23,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787935257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:23,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:23,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:53:23,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326878107] [2022-03-01 17:53:23,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:23,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:23,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:23,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:23,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:23,150 INFO L87 Difference]: Start difference. First operand 5201 states and 22515 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:24,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:24,716 INFO L93 Difference]: Finished difference Result 5778 states and 24749 transitions. [2022-03-01 17:53:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:53:24,716 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:24,731 INFO L225 Difference]: With dead ends: 5778 [2022-03-01 17:53:24,731 INFO L226 Difference]: Without dead ends: 5767 [2022-03-01 17:53:24,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:53:24,731 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 300 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:24,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 515 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:53:24,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5767 states. [2022-03-01 17:53:24,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5767 to 5213. [2022-03-01 17:53:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5213 states, 5212 states have (on average 4.33096699923254) internal successors, (22573), 5212 states have internal predecessors, (22573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:24,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5213 states to 5213 states and 22573 transitions. [2022-03-01 17:53:24,819 INFO L78 Accepts]: Start accepts. Automaton has 5213 states and 22573 transitions. Word has length 23 [2022-03-01 17:53:24,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:24,819 INFO L470 AbstractCegarLoop]: Abstraction has 5213 states and 22573 transitions. [2022-03-01 17:53:24,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:24,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5213 states and 22573 transitions. [2022-03-01 17:53:24,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:24,828 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:24,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:24,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-03-01 17:53:25,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:25,029 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:25,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:25,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2085772066, now seen corresponding path program 41 times [2022-03-01 17:53:25,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:25,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978098144] [2022-03-01 17:53:25,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:25,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:25,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:25,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978098144] [2022-03-01 17:53:25,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978098144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:25,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436401639] [2022-03-01 17:53:25,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:25,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:25,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:25,149 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:25,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-01 17:53:25,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:53:25,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:25,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:25,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:25,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:25,326 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 22 treesize of output 38 [2022-03-01 17:53:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:25,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:25,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:25,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:25,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:25,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:25,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436401639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:25,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:25,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:53:25,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107958251] [2022-03-01 17:53:25,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:25,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:53:25,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:25,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:53:25,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:53:25,854 INFO L87 Difference]: Start difference. First operand 5213 states and 22573 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:26,938 INFO L93 Difference]: Finished difference Result 6143 states and 26250 transitions. [2022-03-01 17:53:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:53:26,939 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:26,954 INFO L225 Difference]: With dead ends: 6143 [2022-03-01 17:53:26,954 INFO L226 Difference]: Without dead ends: 6119 [2022-03-01 17:53:26,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=293, Invalid=1687, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:53:26,954 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 222 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:26,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 642 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1502 Invalid, 0 Unknown, 128 Unchecked, 0.6s Time] [2022-03-01 17:53:26,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6119 states. [2022-03-01 17:53:27,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6119 to 5225. [2022-03-01 17:53:27,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5225 states, 5224 states have (on average 4.332120980091884) internal successors, (22631), 5224 states have internal predecessors, (22631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5225 states to 5225 states and 22631 transitions. [2022-03-01 17:53:27,046 INFO L78 Accepts]: Start accepts. Automaton has 5225 states and 22631 transitions. Word has length 23 [2022-03-01 17:53:27,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:27,046 INFO L470 AbstractCegarLoop]: Abstraction has 5225 states and 22631 transitions. [2022-03-01 17:53:27,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:27,046 INFO L276 IsEmpty]: Start isEmpty. Operand 5225 states and 22631 transitions. [2022-03-01 17:53:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:27,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:27,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:27,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-03-01 17:53:27,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:27,255 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:27,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:27,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1920563204, now seen corresponding path program 42 times [2022-03-01 17:53:27,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:27,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448674397] [2022-03-01 17:53:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:27,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:27,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:27,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448674397] [2022-03-01 17:53:27,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448674397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:27,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20742619] [2022-03-01 17:53:27,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:27,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:27,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:27,372 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:27,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-01 17:53:27,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:53:27,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:27,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:27,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:27,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:27,546 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 22 treesize of output 38 [2022-03-01 17:53:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:27,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:27,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:27,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:27,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:27,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:28,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20742619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:28,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:28,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:53:28,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577379677] [2022-03-01 17:53:28,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:28,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:53:28,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:28,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:53:28,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:53:28,038 INFO L87 Difference]: Start difference. First operand 5225 states and 22631 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:28,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:28,901 INFO L93 Difference]: Finished difference Result 6039 states and 25795 transitions. [2022-03-01 17:53:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:53:28,901 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:28,915 INFO L225 Difference]: With dead ends: 6039 [2022-03-01 17:53:28,915 INFO L226 Difference]: Without dead ends: 6008 [2022-03-01 17:53:28,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:53:28,916 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 236 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:28,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 512 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1292 Invalid, 0 Unknown, 186 Unchecked, 0.5s Time] [2022-03-01 17:53:28,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6008 states. [2022-03-01 17:53:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6008 to 5231. [2022-03-01 17:53:28,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5231 states, 5230 states have (on average 4.332504780114723) internal successors, (22659), 5230 states have internal predecessors, (22659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 22659 transitions. [2022-03-01 17:53:29,001 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 22659 transitions. Word has length 23 [2022-03-01 17:53:29,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:29,001 INFO L470 AbstractCegarLoop]: Abstraction has 5231 states and 22659 transitions. [2022-03-01 17:53:29,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:29,001 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 22659 transitions. [2022-03-01 17:53:29,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:29,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:29,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:29,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-03-01 17:53:29,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:29,210 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:29,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:29,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1911693410, now seen corresponding path program 43 times [2022-03-01 17:53:29,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:29,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321384664] [2022-03-01 17:53:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:29,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:29,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:29,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321384664] [2022-03-01 17:53:29,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321384664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:29,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188502736] [2022-03-01 17:53:29,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:29,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:29,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:29,335 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:29,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-01 17:53:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:29,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:29,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:29,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:29,518 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 22 treesize of output 38 [2022-03-01 17:53:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:29,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:29,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:29,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:29,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:29,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:30,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188502736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:30,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:30,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:53:30,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952838549] [2022-03-01 17:53:30,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:30,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:30,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:30,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:30,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:30,032 INFO L87 Difference]: Start difference. First operand 5231 states and 22659 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:30,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:30,891 INFO L93 Difference]: Finished difference Result 5767 states and 24727 transitions. [2022-03-01 17:53:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:53:30,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:30,906 INFO L225 Difference]: With dead ends: 5767 [2022-03-01 17:53:30,906 INFO L226 Difference]: Without dead ends: 5733 [2022-03-01 17:53:30,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:53:30,906 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 169 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:30,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 553 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1590 Invalid, 0 Unknown, 155 Unchecked, 0.6s Time] [2022-03-01 17:53:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5733 states. [2022-03-01 17:53:30,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5733 to 5231. [2022-03-01 17:53:30,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5231 states, 5230 states have (on average 4.332504780114723) internal successors, (22659), 5230 states have internal predecessors, (22659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 22659 transitions. [2022-03-01 17:53:31,012 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 22659 transitions. Word has length 23 [2022-03-01 17:53:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:31,012 INFO L470 AbstractCegarLoop]: Abstraction has 5231 states and 22659 transitions. [2022-03-01 17:53:31,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 22659 transitions. [2022-03-01 17:53:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:31,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:31,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:31,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-03-01 17:53:31,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:31,221 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:31,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:31,222 INFO L85 PathProgramCache]: Analyzing trace with hash 582995990, now seen corresponding path program 44 times [2022-03-01 17:53:31,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:31,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998064858] [2022-03-01 17:53:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:31,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:31,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:31,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998064858] [2022-03-01 17:53:31,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998064858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:31,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989047827] [2022-03-01 17:53:31,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:31,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:31,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:31,352 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:31,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-01 17:53:31,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:31,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:31,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:31,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:31,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:31,529 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 22 treesize of output 38 [2022-03-01 17:53:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:31,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:32,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:32,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:32,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:32,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:32,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989047827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:32,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:32,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:53:32,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107847693] [2022-03-01 17:53:32,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:32,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:32,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:32,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:32,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:32,072 INFO L87 Difference]: Start difference. First operand 5231 states and 22659 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:32,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:32,912 INFO L93 Difference]: Finished difference Result 5882 states and 25177 transitions. [2022-03-01 17:53:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:53:32,912 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:32,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:32,927 INFO L225 Difference]: With dead ends: 5882 [2022-03-01 17:53:32,927 INFO L226 Difference]: Without dead ends: 5851 [2022-03-01 17:53:32,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:53:32,927 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 230 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:32,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 452 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1103 Invalid, 0 Unknown, 135 Unchecked, 0.5s Time] [2022-03-01 17:53:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2022-03-01 17:53:32,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 5231. [2022-03-01 17:53:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5231 states, 5230 states have (on average 4.332504780114723) internal successors, (22659), 5230 states have internal predecessors, (22659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 22659 transitions. [2022-03-01 17:53:33,057 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 22659 transitions. Word has length 23 [2022-03-01 17:53:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:33,057 INFO L470 AbstractCegarLoop]: Abstraction has 5231 states and 22659 transitions. [2022-03-01 17:53:33,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 22659 transitions. [2022-03-01 17:53:33,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:33,065 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:33,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:33,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:33,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-01 17:53:33,266 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:33,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:33,266 INFO L85 PathProgramCache]: Analyzing trace with hash 812838358, now seen corresponding path program 45 times [2022-03-01 17:53:33,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:33,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199242194] [2022-03-01 17:53:33,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:33,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:33,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:33,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199242194] [2022-03-01 17:53:33,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199242194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:33,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472980353] [2022-03-01 17:53:33,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:33,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:33,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:33,381 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:33,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-01 17:53:33,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:53:33,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:33,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:33,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:33,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:33,557 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 22 treesize of output 38 [2022-03-01 17:53:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:33,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:33,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:33,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:33,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:33,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:34,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472980353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:34,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:34,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:53:34,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754380121] [2022-03-01 17:53:34,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:34,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:53:34,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:34,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:53:34,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:53:34,014 INFO L87 Difference]: Start difference. First operand 5231 states and 22659 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:34,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:34,994 INFO L93 Difference]: Finished difference Result 6128 states and 26206 transitions. [2022-03-01 17:53:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:53:34,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:34,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:35,010 INFO L225 Difference]: With dead ends: 6128 [2022-03-01 17:53:35,010 INFO L226 Difference]: Without dead ends: 6104 [2022-03-01 17:53:35,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:53:35,010 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 232 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:35,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 609 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1390 Invalid, 0 Unknown, 83 Unchecked, 0.5s Time] [2022-03-01 17:53:35,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6104 states. [2022-03-01 17:53:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6104 to 5243. [2022-03-01 17:53:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 5242 states have (on average 4.333842045020984) internal successors, (22718), 5242 states have internal predecessors, (22718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 22718 transitions. [2022-03-01 17:53:35,102 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 22718 transitions. Word has length 23 [2022-03-01 17:53:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:35,102 INFO L470 AbstractCegarLoop]: Abstraction has 5243 states and 22718 transitions. [2022-03-01 17:53:35,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:35,102 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 22718 transitions. [2022-03-01 17:53:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:35,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:35,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:35,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-03-01 17:53:35,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-01 17:53:35,311 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:35,311 INFO L85 PathProgramCache]: Analyzing trace with hash 647629496, now seen corresponding path program 46 times [2022-03-01 17:53:35,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:35,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865616258] [2022-03-01 17:53:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:35,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:35,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:35,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865616258] [2022-03-01 17:53:35,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865616258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:35,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227730349] [2022-03-01 17:53:35,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:35,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:35,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:35,430 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:35,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-01 17:53:35,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:35,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:35,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:35,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:35,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:35,629 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 22 treesize of output 38 [2022-03-01 17:53:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:35,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:36,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:36,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:36,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:36,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:36,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227730349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:36,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:36,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:53:36,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773560316] [2022-03-01 17:53:36,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:36,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:53:36,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:36,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:53:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:53:36,116 INFO L87 Difference]: Start difference. First operand 5243 states and 22718 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:36,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:36,857 INFO L93 Difference]: Finished difference Result 6153 states and 26267 transitions. [2022-03-01 17:53:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:53:36,858 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:36,872 INFO L225 Difference]: With dead ends: 6153 [2022-03-01 17:53:36,872 INFO L226 Difference]: Without dead ends: 6118 [2022-03-01 17:53:36,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:53:36,872 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 249 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:36,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 437 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1073 Invalid, 0 Unknown, 99 Unchecked, 0.4s Time] [2022-03-01 17:53:36,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6118 states. [2022-03-01 17:53:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6118 to 5249. [2022-03-01 17:53:36,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5249 states, 5248 states have (on average 4.336318597560975) internal successors, (22757), 5248 states have internal predecessors, (22757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5249 states to 5249 states and 22757 transitions. [2022-03-01 17:53:36,964 INFO L78 Accepts]: Start accepts. Automaton has 5249 states and 22757 transitions. Word has length 23 [2022-03-01 17:53:36,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:36,964 INFO L470 AbstractCegarLoop]: Abstraction has 5249 states and 22757 transitions. [2022-03-01 17:53:36,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 5249 states and 22757 transitions. [2022-03-01 17:53:36,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:36,973 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:36,973 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:36,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:37,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-01 17:53:37,173 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:37,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1299590272, now seen corresponding path program 47 times [2022-03-01 17:53:37,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:37,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409395074] [2022-03-01 17:53:37,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:37,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:37,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:37,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:37,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409395074] [2022-03-01 17:53:37,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409395074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:37,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929330904] [2022-03-01 17:53:37,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:37,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:37,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:37,288 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:37,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-01 17:53:37,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:53:37,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:37,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:37,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:37,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:37,475 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 22 treesize of output 38 [2022-03-01 17:53:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:37,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:37,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:37,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:37,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:37,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:37,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929330904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:37,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:37,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:53:37,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808622212] [2022-03-01 17:53:37,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:37,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:53:37,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:37,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:53:37,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:53:37,987 INFO L87 Difference]: Start difference. First operand 5249 states and 22757 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:38,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:38,870 INFO L93 Difference]: Finished difference Result 5968 states and 25580 transitions. [2022-03-01 17:53:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:53:38,870 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:38,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:38,885 INFO L225 Difference]: With dead ends: 5968 [2022-03-01 17:53:38,886 INFO L226 Difference]: Without dead ends: 5944 [2022-03-01 17:53:38,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:53:38,886 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 150 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:38,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 645 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1587 Invalid, 0 Unknown, 91 Unchecked, 0.6s Time] [2022-03-01 17:53:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2022-03-01 17:53:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 5261. [2022-03-01 17:53:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 4.336121673003802) internal successors, (22808), 5260 states have internal predecessors, (22808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 22808 transitions. [2022-03-01 17:53:38,983 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 22808 transitions. Word has length 23 [2022-03-01 17:53:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:38,983 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 22808 transitions. [2022-03-01 17:53:38,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:38,984 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 22808 transitions. [2022-03-01 17:53:38,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:38,993 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:38,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:39,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-03-01 17:53:39,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-01 17:53:39,193 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:39,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:39,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2089216064, now seen corresponding path program 48 times [2022-03-01 17:53:39,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:39,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259639248] [2022-03-01 17:53:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:39,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:39,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:39,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259639248] [2022-03-01 17:53:39,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259639248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:39,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239937651] [2022-03-01 17:53:39,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:39,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:39,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:39,322 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:39,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-01 17:53:39,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:53:39,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:39,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:39,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:39,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:39,516 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:53:39,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 49 [2022-03-01 17:53:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:39,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:39,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239937651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:39,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:39,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-03-01 17:53:39,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077753996] [2022-03-01 17:53:39,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:39,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:53:39,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:39,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:53:39,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:53:39,892 INFO L87 Difference]: Start difference. First operand 5261 states and 22808 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 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) [2022-03-01 17:53:42,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:42,051 INFO L93 Difference]: Finished difference Result 6764 states and 28739 transitions. [2022-03-01 17:53:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 17:53:42,051 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 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 23 [2022-03-01 17:53:42,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:42,069 INFO L225 Difference]: With dead ends: 6764 [2022-03-01 17:53:42,069 INFO L226 Difference]: Without dead ends: 6706 [2022-03-01 17:53:42,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=516, Invalid=3266, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 17:53:42,070 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 456 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:42,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 763 Invalid, 2336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 17:53:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6706 states. [2022-03-01 17:53:42,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6706 to 5377. [2022-03-01 17:53:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5377 states, 5376 states have (on average 4.340773809523809) internal successors, (23336), 5376 states have internal predecessors, (23336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:42,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5377 states to 5377 states and 23336 transitions. [2022-03-01 17:53:42,173 INFO L78 Accepts]: Start accepts. Automaton has 5377 states and 23336 transitions. Word has length 23 [2022-03-01 17:53:42,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:42,174 INFO L470 AbstractCegarLoop]: Abstraction has 5377 states and 23336 transitions. [2022-03-01 17:53:42,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 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) [2022-03-01 17:53:42,174 INFO L276 IsEmpty]: Start isEmpty. Operand 5377 states and 23336 transitions. [2022-03-01 17:53:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:42,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:42,183 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:42,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-03-01 17:53:42,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2022-03-01 17:53:42,384 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:42,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1666679604, now seen corresponding path program 49 times [2022-03-01 17:53:42,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:42,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393051402] [2022-03-01 17:53:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:42,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:42,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:42,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393051402] [2022-03-01 17:53:42,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393051402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:42,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457264798] [2022-03-01 17:53:42,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:42,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:42,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:42,498 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:42,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-01 17:53:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:42,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:42,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:42,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:42,682 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 26 treesize of output 42 [2022-03-01 17:53:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:42,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:43,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:43,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:43,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:43,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:43,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457264798] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:43,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:43,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:53:43,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86009584] [2022-03-01 17:53:43,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:43,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:53:43,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:43,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:53:43,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:53:43,143 INFO L87 Difference]: Start difference. First operand 5377 states and 23336 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:43,932 INFO L93 Difference]: Finished difference Result 5978 states and 25673 transitions. [2022-03-01 17:53:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:53:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:43,947 INFO L225 Difference]: With dead ends: 5978 [2022-03-01 17:53:43,947 INFO L226 Difference]: Without dead ends: 5934 [2022-03-01 17:53:43,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:53:43,947 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 129 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:43,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 517 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1260 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2022-03-01 17:53:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5934 states. [2022-03-01 17:53:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5934 to 5377. [2022-03-01 17:53:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5377 states, 5376 states have (on average 4.340773809523809) internal successors, (23336), 5376 states have internal predecessors, (23336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:44,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5377 states to 5377 states and 23336 transitions. [2022-03-01 17:53:44,038 INFO L78 Accepts]: Start accepts. Automaton has 5377 states and 23336 transitions. Word has length 23 [2022-03-01 17:53:44,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:44,038 INFO L470 AbstractCegarLoop]: Abstraction has 5377 states and 23336 transitions. [2022-03-01 17:53:44,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 5377 states and 23336 transitions. [2022-03-01 17:53:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:44,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:44,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:44,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-03-01 17:53:44,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-03-01 17:53:44,248 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:44,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:44,248 INFO L85 PathProgramCache]: Analyzing trace with hash -281037928, now seen corresponding path program 90 times [2022-03-01 17:53:44,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:44,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697769167] [2022-03-01 17:53:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:44,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:44,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:44,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697769167] [2022-03-01 17:53:44,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697769167] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:44,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243863513] [2022-03-01 17:53:44,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:44,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:44,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:44,369 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:44,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-01 17:53:44,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:53:44,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:44,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:44,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:44,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:44,562 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 29 treesize of output 41 [2022-03-01 17:53:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:44,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:44,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:44,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:44,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:44,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:45,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243863513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:45,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:45,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:53:45,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944628432] [2022-03-01 17:53:45,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:45,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:53:45,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:45,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:53:45,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:53:45,030 INFO L87 Difference]: Start difference. First operand 5377 states and 23336 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:45,736 INFO L93 Difference]: Finished difference Result 5599 states and 24184 transitions. [2022-03-01 17:53:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:53:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:45,750 INFO L225 Difference]: With dead ends: 5599 [2022-03-01 17:53:45,750 INFO L226 Difference]: Without dead ends: 5584 [2022-03-01 17:53:45,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:53:45,751 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 141 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:45,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 391 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:53:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2022-03-01 17:53:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 5383. [2022-03-01 17:53:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5383 states, 5382 states have (on average 4.340951319212189) internal successors, (23363), 5382 states have internal predecessors, (23363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:45,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5383 states to 5383 states and 23363 transitions. [2022-03-01 17:53:45,844 INFO L78 Accepts]: Start accepts. Automaton has 5383 states and 23363 transitions. Word has length 23 [2022-03-01 17:53:45,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:45,844 INFO L470 AbstractCegarLoop]: Abstraction has 5383 states and 23363 transitions. [2022-03-01 17:53:45,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:45,844 INFO L276 IsEmpty]: Start isEmpty. Operand 5383 states and 23363 transitions. [2022-03-01 17:53:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:45,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:45,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:45,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:46,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:46,054 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:46,054 INFO L85 PathProgramCache]: Analyzing trace with hash -415825832, now seen corresponding path program 91 times [2022-03-01 17:53:46,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:46,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566005382] [2022-03-01 17:53:46,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:46,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:46,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:46,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566005382] [2022-03-01 17:53:46,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566005382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:46,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107636076] [2022-03-01 17:53:46,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:46,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:46,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:46,173 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:46,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-01 17:53:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:46,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:46,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:46,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:46,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:46,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:46,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 46 [2022-03-01 17:53:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:46,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:46,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:46,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-01 17:53:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:46,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107636076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:46,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:46,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:53:46,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909723320] [2022-03-01 17:53:46,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:46,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:53:46,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:46,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:53:46,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:53:46,951 INFO L87 Difference]: Start difference. First operand 5383 states and 23363 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:48,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:48,579 INFO L93 Difference]: Finished difference Result 6102 states and 26185 transitions. [2022-03-01 17:53:48,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:53:48,580 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:48,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:48,594 INFO L225 Difference]: With dead ends: 6102 [2022-03-01 17:53:48,594 INFO L226 Difference]: Without dead ends: 6072 [2022-03-01 17:53:48,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=454, Invalid=1996, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:53:48,595 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 258 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:48,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 508 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 757 Invalid, 0 Unknown, 506 Unchecked, 0.4s Time] [2022-03-01 17:53:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6072 states. [2022-03-01 17:53:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6072 to 5419. [2022-03-01 17:53:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5418 states have (on average 4.343484680693983) internal successors, (23533), 5418 states have internal predecessors, (23533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:48,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 23533 transitions. [2022-03-01 17:53:48,685 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 23533 transitions. Word has length 23 [2022-03-01 17:53:48,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:48,685 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 23533 transitions. [2022-03-01 17:53:48,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:48,685 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 23533 transitions. [2022-03-01 17:53:48,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:48,695 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:48,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:48,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:48,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-03-01 17:53:48,895 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:48,895 INFO L85 PathProgramCache]: Analyzing trace with hash 169508120, now seen corresponding path program 92 times [2022-03-01 17:53:48,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:48,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152849434] [2022-03-01 17:53:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:48,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:49,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:49,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152849434] [2022-03-01 17:53:49,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152849434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:49,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460543688] [2022-03-01 17:53:49,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:49,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:49,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:49,016 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:49,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-01 17:53:49,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:49,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:49,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:49,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:49,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:49,177 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 26 treesize of output 40 [2022-03-01 17:53:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:49,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:49,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:49,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:49,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:49,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:49,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460543688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:49,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:49,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-01 17:53:49,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988653968] [2022-03-01 17:53:49,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:49,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:53:49,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:49,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:53:49,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:53:49,729 INFO L87 Difference]: Start difference. First operand 5419 states and 23533 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:50,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:50,703 INFO L93 Difference]: Finished difference Result 5736 states and 24729 transitions. [2022-03-01 17:53:50,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:53:50,704 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:50,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:50,719 INFO L225 Difference]: With dead ends: 5736 [2022-03-01 17:53:50,720 INFO L226 Difference]: Without dead ends: 5714 [2022-03-01 17:53:50,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:53:50,720 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 187 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:50,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 395 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:53:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5714 states. [2022-03-01 17:53:50,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5714 to 5423. [2022-03-01 17:53:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5423 states, 5422 states have (on average 4.343231279970491) internal successors, (23549), 5422 states have internal predecessors, (23549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5423 states to 5423 states and 23549 transitions. [2022-03-01 17:53:50,847 INFO L78 Accepts]: Start accepts. Automaton has 5423 states and 23549 transitions. Word has length 23 [2022-03-01 17:53:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:50,847 INFO L470 AbstractCegarLoop]: Abstraction has 5423 states and 23549 transitions. [2022-03-01 17:53:50,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5423 states and 23549 transitions. [2022-03-01 17:53:50,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:50,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:50,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:50,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:51,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:51,073 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:51,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1783074854, now seen corresponding path program 93 times [2022-03-01 17:53:51,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:51,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711052242] [2022-03-01 17:53:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:51,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:51,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:51,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711052242] [2022-03-01 17:53:51,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711052242] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:51,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994534274] [2022-03-01 17:53:51,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:51,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:51,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:51,203 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:51,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-01 17:53:51,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:53:51,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:51,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:51,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:51,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:51,406 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:53:51,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 58 [2022-03-01 17:53:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:51,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:51,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994534274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:51,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:51,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:53:51,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351316489] [2022-03-01 17:53:51,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:51,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:51,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:51,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:51,727 INFO L87 Difference]: Start difference. First operand 5423 states and 23549 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:53,705 INFO L93 Difference]: Finished difference Result 6769 states and 28860 transitions. [2022-03-01 17:53:53,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 17:53:53,706 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:53,722 INFO L225 Difference]: With dead ends: 6769 [2022-03-01 17:53:53,722 INFO L226 Difference]: Without dead ends: 6733 [2022-03-01 17:53:53,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=571, Invalid=3985, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 17:53:53,722 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 418 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:53,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 674 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1587 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:53:53,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6733 states. [2022-03-01 17:53:53,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6733 to 5511. [2022-03-01 17:53:53,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5511 states, 5510 states have (on average 4.344464609800363) internal successors, (23938), 5510 states have internal predecessors, (23938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 23938 transitions. [2022-03-01 17:53:53,815 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 23938 transitions. Word has length 23 [2022-03-01 17:53:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:53,815 INFO L470 AbstractCegarLoop]: Abstraction has 5511 states and 23938 transitions. [2022-03-01 17:53:53,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:53,815 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 23938 transitions. [2022-03-01 17:53:53,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:53,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:53,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:53,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-03-01 17:53:54,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2022-03-01 17:53:54,024 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:54,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:54,025 INFO L85 PathProgramCache]: Analyzing trace with hash -261388314, now seen corresponding path program 94 times [2022-03-01 17:53:54,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:54,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041242660] [2022-03-01 17:53:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:54,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:54,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:54,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041242660] [2022-03-01 17:53:54,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041242660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:54,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291769573] [2022-03-01 17:53:54,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:54,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:54,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:54,141 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:54,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-01 17:53:54,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:54,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:54,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:54,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:54,329 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 29 treesize of output 41 [2022-03-01 17:53:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:54,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:54,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:54,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:54,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:54,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:54,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291769573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:54,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:54,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-01 17:53:54,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843215463] [2022-03-01 17:53:54,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:54,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:53:54,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:54,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:53:54,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:53:54,800 INFO L87 Difference]: Start difference. First operand 5511 states and 23938 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:55,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:55,561 INFO L93 Difference]: Finished difference Result 5701 states and 24653 transitions. [2022-03-01 17:53:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:53:55,561 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:55,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:55,576 INFO L225 Difference]: With dead ends: 5701 [2022-03-01 17:53:55,576 INFO L226 Difference]: Without dead ends: 5686 [2022-03-01 17:53:55,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:53:55,576 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 130 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:55,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 444 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:53:55,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2022-03-01 17:53:55,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 5511. [2022-03-01 17:53:55,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5511 states, 5510 states have (on average 4.344464609800363) internal successors, (23938), 5510 states have internal predecessors, (23938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 23938 transitions. [2022-03-01 17:53:55,696 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 23938 transitions. Word has length 23 [2022-03-01 17:53:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:55,696 INFO L470 AbstractCegarLoop]: Abstraction has 5511 states and 23938 transitions. [2022-03-01 17:53:55,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 23938 transitions. [2022-03-01 17:53:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:55,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:55,706 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:55,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-03-01 17:53:55,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:55,906 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:55,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:55,907 INFO L85 PathProgramCache]: Analyzing trace with hash 402547988, now seen corresponding path program 95 times [2022-03-01 17:53:55,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:55,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108798832] [2022-03-01 17:53:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:55,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:56,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:56,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108798832] [2022-03-01 17:53:56,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108798832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:56,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376760265] [2022-03-01 17:53:56,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:56,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:56,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:56,028 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:56,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-01 17:53:56,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:53:56,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:56,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:53:56,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:56,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:56,203 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 33 treesize of output 45 [2022-03-01 17:53:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:56,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:56,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:56,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:53:56,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:56,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:53:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:56,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376760265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:56,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:56,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:53:56,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761159002] [2022-03-01 17:53:56,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:56,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:53:56,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:56,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:53:56,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:53:56,700 INFO L87 Difference]: Start difference. First operand 5511 states and 23938 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:57,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:57,511 INFO L93 Difference]: Finished difference Result 5737 states and 24797 transitions. [2022-03-01 17:53:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:53:57,512 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:53:57,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:57,526 INFO L225 Difference]: With dead ends: 5737 [2022-03-01 17:53:57,526 INFO L226 Difference]: Without dead ends: 5722 [2022-03-01 17:53:57,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:53:57,527 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 122 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:57,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 461 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:53:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5722 states. [2022-03-01 17:53:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5722 to 5515. [2022-03-01 17:53:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5515 states, 5514 states have (on average 4.3445774392455565) internal successors, (23956), 5514 states have internal predecessors, (23956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5515 states to 5515 states and 23956 transitions. [2022-03-01 17:53:57,664 INFO L78 Accepts]: Start accepts. Automaton has 5515 states and 23956 transitions. Word has length 23 [2022-03-01 17:53:57,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:57,664 INFO L470 AbstractCegarLoop]: Abstraction has 5515 states and 23956 transitions. [2022-03-01 17:53:57,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:57,664 INFO L276 IsEmpty]: Start isEmpty. Operand 5515 states and 23956 transitions. [2022-03-01 17:53:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:53:57,674 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:57,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:57,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-03-01 17:53:57,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-03-01 17:53:57,874 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:53:57,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash -19386280, now seen corresponding path program 96 times [2022-03-01 17:53:57,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:57,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962807127] [2022-03-01 17:53:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:57,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:57,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:57,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962807127] [2022-03-01 17:53:57,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962807127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:57,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899187874] [2022-03-01 17:53:57,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:57,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:57,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:57,994 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:57,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-01 17:53:58,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:53:58,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:58,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:58,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:58,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:58,216 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:53:58,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2022-03-01 17:53:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:58,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:58,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899187874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:58,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:58,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:53:58,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735497553] [2022-03-01 17:53:58,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:58,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:53:58,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:58,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:53:58,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:53:58,516 INFO L87 Difference]: Start difference. First operand 5515 states and 23956 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:00,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:00,576 INFO L93 Difference]: Finished difference Result 7377 states and 31396 transitions. [2022-03-01 17:54:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:54:00,576 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:00,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:00,596 INFO L225 Difference]: With dead ends: 7377 [2022-03-01 17:54:00,596 INFO L226 Difference]: Without dead ends: 7338 [2022-03-01 17:54:00,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=436, Invalid=3104, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:54:00,596 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 410 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 2730 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 2888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:00,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 1066 Invalid, 2888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2730 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 17:54:00,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7338 states. [2022-03-01 17:54:00,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7338 to 5596. [2022-03-01 17:54:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5596 states, 5595 states have (on average 4.349776586237712) internal successors, (24337), 5595 states have internal predecessors, (24337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5596 states to 5596 states and 24337 transitions. [2022-03-01 17:54:00,720 INFO L78 Accepts]: Start accepts. Automaton has 5596 states and 24337 transitions. Word has length 23 [2022-03-01 17:54:00,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:00,720 INFO L470 AbstractCegarLoop]: Abstraction has 5596 states and 24337 transitions. [2022-03-01 17:54:00,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:00,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5596 states and 24337 transitions. [2022-03-01 17:54:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:00,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:00,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:00,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-03-01 17:54:00,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:00,931 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:00,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:00,931 INFO L85 PathProgramCache]: Analyzing trace with hash -925547240, now seen corresponding path program 97 times [2022-03-01 17:54:00,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:00,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226994423] [2022-03-01 17:54:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:00,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:01,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:01,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226994423] [2022-03-01 17:54:01,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226994423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:01,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892639008] [2022-03-01 17:54:01,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:01,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:01,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:01,064 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:01,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-01 17:54:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:01,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:01,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:01,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:01,231 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 26 treesize of output 40 [2022-03-01 17:54:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:01,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:01,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:01,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:01,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:01,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:01,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892639008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:01,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:01,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:54:01,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539630051] [2022-03-01 17:54:01,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:01,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:54:01,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:01,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:54:01,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:54:01,869 INFO L87 Difference]: Start difference. First operand 5596 states and 24337 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:03,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:03,433 INFO L93 Difference]: Finished difference Result 5843 states and 25272 transitions. [2022-03-01 17:54:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:54:03,434 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:03,448 INFO L225 Difference]: With dead ends: 5843 [2022-03-01 17:54:03,448 INFO L226 Difference]: Without dead ends: 5822 [2022-03-01 17:54:03,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:54:03,448 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 174 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:03,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 416 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:54:03,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2022-03-01 17:54:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 5600. [2022-03-01 17:54:03,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5600 states, 5599 states have (on average 4.349526701196642) internal successors, (24353), 5599 states have internal predecessors, (24353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5600 states to 5600 states and 24353 transitions. [2022-03-01 17:54:03,535 INFO L78 Accepts]: Start accepts. Automaton has 5600 states and 24353 transitions. Word has length 23 [2022-03-01 17:54:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:03,535 INFO L470 AbstractCegarLoop]: Abstraction has 5600 states and 24353 transitions. [2022-03-01 17:54:03,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 5600 states and 24353 transitions. [2022-03-01 17:54:03,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:03,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:03,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:03,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-03-01 17:54:03,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-01 17:54:03,745 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:03,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:03,745 INFO L85 PathProgramCache]: Analyzing trace with hash 150163916, now seen corresponding path program 98 times [2022-03-01 17:54:03,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:03,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201137842] [2022-03-01 17:54:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:03,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:03,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:03,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201137842] [2022-03-01 17:54:03,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201137842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:03,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715950182] [2022-03-01 17:54:03,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:03,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:03,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:03,872 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:03,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-01 17:54:03,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:03,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:03,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:03,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:04,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:04,033 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 26 treesize of output 40 [2022-03-01 17:54:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:04,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:04,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:04,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:04,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:04,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:04,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715950182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:04,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:04,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:54:04,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692777003] [2022-03-01 17:54:04,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:04,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:54:04,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:04,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:54:04,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:54:04,602 INFO L87 Difference]: Start difference. First operand 5600 states and 24353 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:05,782 INFO L93 Difference]: Finished difference Result 5824 states and 25205 transitions. [2022-03-01 17:54:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:54:05,782 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:05,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:05,798 INFO L225 Difference]: With dead ends: 5824 [2022-03-01 17:54:05,798 INFO L226 Difference]: Without dead ends: 5809 [2022-03-01 17:54:05,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:54:05,799 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 137 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:05,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 409 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:54:05,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5809 states. [2022-03-01 17:54:05,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5809 to 5596. [2022-03-01 17:54:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5596 states, 5595 states have (on average 4.349776586237712) internal successors, (24337), 5595 states have internal predecessors, (24337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:05,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5596 states to 5596 states and 24337 transitions. [2022-03-01 17:54:05,897 INFO L78 Accepts]: Start accepts. Automaton has 5596 states and 24337 transitions. Word has length 23 [2022-03-01 17:54:05,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:05,897 INFO L470 AbstractCegarLoop]: Abstraction has 5596 states and 24337 transitions. [2022-03-01 17:54:05,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand 5596 states and 24337 transitions. [2022-03-01 17:54:05,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:05,907 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:05,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:05,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-03-01 17:54:06,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-03-01 17:54:06,108 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:06,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:06,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1348083700, now seen corresponding path program 99 times [2022-03-01 17:54:06,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:06,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355197365] [2022-03-01 17:54:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:06,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:06,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:06,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355197365] [2022-03-01 17:54:06,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355197365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:06,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859659450] [2022-03-01 17:54:06,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:06,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:06,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:06,225 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:06,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-01 17:54:06,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:54:06,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:06,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:06,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:06,413 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 29 treesize of output 41 [2022-03-01 17:54:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:06,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:06,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:06,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:06,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:06,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859659450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:06,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:06,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-01 17:54:06,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225452303] [2022-03-01 17:54:06,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:06,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:54:06,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:06,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:54:06,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:54:06,901 INFO L87 Difference]: Start difference. First operand 5596 states and 24337 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:07,637 INFO L93 Difference]: Finished difference Result 5811 states and 25150 transitions. [2022-03-01 17:54:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:54:07,637 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:07,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:07,652 INFO L225 Difference]: With dead ends: 5811 [2022-03-01 17:54:07,652 INFO L226 Difference]: Without dead ends: 5796 [2022-03-01 17:54:07,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:07,653 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 133 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:07,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 389 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:54:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5796 states. [2022-03-01 17:54:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5796 to 5596. [2022-03-01 17:54:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5596 states, 5595 states have (on average 4.349776586237712) internal successors, (24337), 5595 states have internal predecessors, (24337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:07,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5596 states to 5596 states and 24337 transitions. [2022-03-01 17:54:07,768 INFO L78 Accepts]: Start accepts. Automaton has 5596 states and 24337 transitions. Word has length 23 [2022-03-01 17:54:07,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:07,768 INFO L470 AbstractCegarLoop]: Abstraction has 5596 states and 24337 transitions. [2022-03-01 17:54:07,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 5596 states and 24337 transitions. [2022-03-01 17:54:07,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:07,778 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:07,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:07,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:07,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:07,979 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:07,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:07,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1894009576, now seen corresponding path program 100 times [2022-03-01 17:54:07,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:07,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157225345] [2022-03-01 17:54:07,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:07,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:08,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:08,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157225345] [2022-03-01 17:54:08,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157225345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:08,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132527918] [2022-03-01 17:54:08,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:08,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:08,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:08,096 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:08,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-01 17:54:08,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:08,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:08,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:08,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:08,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:08,274 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 22 treesize of output 38 [2022-03-01 17:54:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:08,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:08,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:08,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:08,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:08,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:08,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132527918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:08,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:08,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:54:08,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421500870] [2022-03-01 17:54:08,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:08,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:54:08,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:08,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:54:08,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:54:08,758 INFO L87 Difference]: Start difference. First operand 5596 states and 24337 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:09,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:09,472 INFO L93 Difference]: Finished difference Result 5844 states and 25284 transitions. [2022-03-01 17:54:09,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:54:09,472 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:09,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:09,487 INFO L225 Difference]: With dead ends: 5844 [2022-03-01 17:54:09,487 INFO L226 Difference]: Without dead ends: 5829 [2022-03-01 17:54:09,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:09,488 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 96 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:09,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 539 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1326 Invalid, 0 Unknown, 35 Unchecked, 0.5s Time] [2022-03-01 17:54:09,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5829 states. [2022-03-01 17:54:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5829 to 5598. [2022-03-01 17:54:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5598 states, 5597 states have (on average 4.349830266214044) internal successors, (24346), 5597 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) [2022-03-01 17:54:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5598 states to 5598 states and 24346 transitions. [2022-03-01 17:54:09,634 INFO L78 Accepts]: Start accepts. Automaton has 5598 states and 24346 transitions. Word has length 23 [2022-03-01 17:54:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:09,634 INFO L470 AbstractCegarLoop]: Abstraction has 5598 states and 24346 transitions. [2022-03-01 17:54:09,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 5598 states and 24346 transitions. [2022-03-01 17:54:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:09,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:09,644 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:09,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:09,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:09,845 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:09,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1308675624, now seen corresponding path program 101 times [2022-03-01 17:54:09,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:09,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289527392] [2022-03-01 17:54:09,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:09,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:09,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:09,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289527392] [2022-03-01 17:54:09,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289527392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:09,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555908638] [2022-03-01 17:54:09,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:09,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:09,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:09,968 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:09,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-01 17:54:09,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:54:09,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:09,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:09,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:10,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:10,135 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 21 treesize of output 37 [2022-03-01 17:54:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:10,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:10,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:10,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:10,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:10,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:10,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555908638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:10,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:10,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:54:10,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233292267] [2022-03-01 17:54:10,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:10,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:54:10,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:10,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:54:10,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:54:10,659 INFO L87 Difference]: Start difference. First operand 5598 states and 24346 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:11,443 INFO L93 Difference]: Finished difference Result 5903 states and 25485 transitions. [2022-03-01 17:54:11,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:54:11,444 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:11,458 INFO L225 Difference]: With dead ends: 5903 [2022-03-01 17:54:11,458 INFO L226 Difference]: Without dead ends: 5855 [2022-03-01 17:54:11,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:54:11,459 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 128 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:11,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 431 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 982 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2022-03-01 17:54:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5855 states. [2022-03-01 17:54:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5855 to 5614. [2022-03-01 17:54:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5614 states, 5613 states have (on average 4.349723855335828) internal successors, (24415), 5613 states have internal predecessors, (24415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:11,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5614 states to 5614 states and 24415 transitions. [2022-03-01 17:54:11,560 INFO L78 Accepts]: Start accepts. Automaton has 5614 states and 24415 transitions. Word has length 23 [2022-03-01 17:54:11,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:11,560 INFO L470 AbstractCegarLoop]: Abstraction has 5614 states and 24415 transitions. [2022-03-01 17:54:11,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:11,561 INFO L276 IsEmpty]: Start isEmpty. Operand 5614 states and 24415 transitions. [2022-03-01 17:54:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:11,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:11,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:11,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:11,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2022-03-01 17:54:11,771 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:11,772 INFO L85 PathProgramCache]: Analyzing trace with hash 304891110, now seen corresponding path program 102 times [2022-03-01 17:54:11,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:11,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124153375] [2022-03-01 17:54:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:11,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:11,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:11,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124153375] [2022-03-01 17:54:11,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124153375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:11,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16235221] [2022-03-01 17:54:11,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:11,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:11,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:11,921 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:11,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-01 17:54:11,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:54:11,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:11,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:12,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:12,084 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 25 treesize of output 41 [2022-03-01 17:54:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:12,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:12,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:12,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:12,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:12,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:12,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16235221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:12,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:12,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:54:12,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590741487] [2022-03-01 17:54:12,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:12,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:54:12,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:12,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:54:12,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:54:12,650 INFO L87 Difference]: Start difference. First operand 5614 states and 24415 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:13,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:13,373 INFO L93 Difference]: Finished difference Result 5874 states and 25378 transitions. [2022-03-01 17:54:13,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:54:13,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:13,388 INFO L225 Difference]: With dead ends: 5874 [2022-03-01 17:54:13,388 INFO L226 Difference]: Without dead ends: 5838 [2022-03-01 17:54:13,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:54:13,388 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 110 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:13,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 418 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1112 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-03-01 17:54:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5838 states. [2022-03-01 17:54:13,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5838 to 5606. [2022-03-01 17:54:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5606 states, 5605 states have (on average 4.349866190900982) internal successors, (24381), 5605 states have internal predecessors, (24381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5606 states to 5606 states and 24381 transitions. [2022-03-01 17:54:13,481 INFO L78 Accepts]: Start accepts. Automaton has 5606 states and 24381 transitions. Word has length 23 [2022-03-01 17:54:13,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:13,481 INFO L470 AbstractCegarLoop]: Abstraction has 5606 states and 24381 transitions. [2022-03-01 17:54:13,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:13,482 INFO L276 IsEmpty]: Start isEmpty. Operand 5606 states and 24381 transitions. [2022-03-01 17:54:13,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:13,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:13,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:13,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-03-01 17:54:13,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-03-01 17:54:13,692 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:13,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:13,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2121230956, now seen corresponding path program 103 times [2022-03-01 17:54:13,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:13,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491374498] [2022-03-01 17:54:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:13,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:13,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:13,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491374498] [2022-03-01 17:54:13,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491374498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:13,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52078821] [2022-03-01 17:54:13,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:13,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:13,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:13,812 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:13,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-01 17:54:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:13,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:13,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:13,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:13,993 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 26 treesize of output 42 [2022-03-01 17:54:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:14,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:14,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:14,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:14,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:14,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:14,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52078821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:14,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:14,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:54:14,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993967129] [2022-03-01 17:54:14,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:14,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:54:14,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:14,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:54:14,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:54:14,515 INFO L87 Difference]: Start difference. First operand 5606 states and 24381 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:15,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:15,174 INFO L93 Difference]: Finished difference Result 5907 states and 25536 transitions. [2022-03-01 17:54:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:54:15,174 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:15,190 INFO L225 Difference]: With dead ends: 5907 [2022-03-01 17:54:15,191 INFO L226 Difference]: Without dead ends: 5892 [2022-03-01 17:54:15,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:15,191 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 136 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:15,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 462 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1130 Invalid, 0 Unknown, 150 Unchecked, 0.4s Time] [2022-03-01 17:54:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2022-03-01 17:54:15,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5610. [2022-03-01 17:54:15,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5610 states, 5609 states have (on average 4.34997325726511) internal successors, (24399), 5609 states have internal predecessors, (24399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5610 states to 5610 states and 24399 transitions. [2022-03-01 17:54:15,298 INFO L78 Accepts]: Start accepts. Automaton has 5610 states and 24399 transitions. Word has length 23 [2022-03-01 17:54:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:15,298 INFO L470 AbstractCegarLoop]: Abstraction has 5610 states and 24399 transitions. [2022-03-01 17:54:15,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:15,298 INFO L276 IsEmpty]: Start isEmpty. Operand 5610 states and 24399 transitions. [2022-03-01 17:54:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:15,309 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:15,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:15,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-03-01 17:54:15,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2022-03-01 17:54:15,509 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:15,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:15,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1607704104, now seen corresponding path program 104 times [2022-03-01 17:54:15,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:15,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475506581] [2022-03-01 17:54:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:15,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:15,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:15,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475506581] [2022-03-01 17:54:15,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475506581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:15,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753289469] [2022-03-01 17:54:15,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:15,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:15,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:15,641 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:15,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-01 17:54:15,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:15,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:15,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:15,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:15,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:15,824 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 25 treesize of output 41 [2022-03-01 17:54:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:16,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:16,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:16,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:16,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:16,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:16,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753289469] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:16,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:16,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:54:16,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733339700] [2022-03-01 17:54:16,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:16,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:54:16,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:16,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:54:16,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:54:16,408 INFO L87 Difference]: Start difference. First operand 5610 states and 24399 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:17,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:17,282 INFO L93 Difference]: Finished difference Result 5937 states and 25657 transitions. [2022-03-01 17:54:17,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:54:17,283 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:17,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:17,298 INFO L225 Difference]: With dead ends: 5937 [2022-03-01 17:54:17,298 INFO L226 Difference]: Without dead ends: 5916 [2022-03-01 17:54:17,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:54:17,298 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 196 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:17,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 336 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 812 Invalid, 0 Unknown, 222 Unchecked, 0.4s Time] [2022-03-01 17:54:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5916 states. [2022-03-01 17:54:17,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5916 to 5614. [2022-03-01 17:54:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5614 states, 5613 states have (on average 4.349723855335828) internal successors, (24415), 5613 states have internal predecessors, (24415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5614 states to 5614 states and 24415 transitions. [2022-03-01 17:54:17,393 INFO L78 Accepts]: Start accepts. Automaton has 5614 states and 24415 transitions. Word has length 23 [2022-03-01 17:54:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:17,393 INFO L470 AbstractCegarLoop]: Abstraction has 5614 states and 24415 transitions. [2022-03-01 17:54:17,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:17,393 INFO L276 IsEmpty]: Start isEmpty. Operand 5614 states and 24415 transitions. [2022-03-01 17:54:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:17,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:17,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:17,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-03-01 17:54:17,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:17,603 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:17,604 INFO L85 PathProgramCache]: Analyzing trace with hash -531992948, now seen corresponding path program 105 times [2022-03-01 17:54:17,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:17,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795430205] [2022-03-01 17:54:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:17,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:17,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:17,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795430205] [2022-03-01 17:54:17,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795430205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:17,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126145840] [2022-03-01 17:54:17,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:17,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:17,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:17,742 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:17,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-01 17:54:17,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:54:17,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:17,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:54:17,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:17,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:17,925 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 36 treesize of output 52 [2022-03-01 17:54:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:18,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:18,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:18,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:18,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:18,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:18,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126145840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:18,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:18,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:54:18,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302901983] [2022-03-01 17:54:18,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:18,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:54:18,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:18,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:54:18,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:54:18,263 INFO L87 Difference]: Start difference. First operand 5614 states and 24415 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:19,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:19,451 INFO L93 Difference]: Finished difference Result 5863 states and 25360 transitions. [2022-03-01 17:54:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:54:19,451 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:19,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:19,495 INFO L225 Difference]: With dead ends: 5863 [2022-03-01 17:54:19,495 INFO L226 Difference]: Without dead ends: 5848 [2022-03-01 17:54:19,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=184, Invalid=936, Unknown=2, NotChecked=0, Total=1122 [2022-03-01 17:54:19,495 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 113 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:19,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 295 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 772 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-03-01 17:54:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5848 states. [2022-03-01 17:54:19,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5848 to 5606. [2022-03-01 17:54:19,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5606 states, 5605 states have (on average 4.349866190900982) internal successors, (24381), 5605 states have internal predecessors, (24381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5606 states to 5606 states and 24381 transitions. [2022-03-01 17:54:19,575 INFO L78 Accepts]: Start accepts. Automaton has 5606 states and 24381 transitions. Word has length 23 [2022-03-01 17:54:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:19,575 INFO L470 AbstractCegarLoop]: Abstraction has 5606 states and 24381 transitions. [2022-03-01 17:54:19,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5606 states and 24381 transitions. [2022-03-01 17:54:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:19,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:19,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:19,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-03-01 17:54:19,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2022-03-01 17:54:19,785 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:19,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash -250997096, now seen corresponding path program 106 times [2022-03-01 17:54:19,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:19,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417320986] [2022-03-01 17:54:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:19,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:19,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:19,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417320986] [2022-03-01 17:54:19,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417320986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:19,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026714474] [2022-03-01 17:54:19,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:19,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:19,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:19,918 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:19,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-01 17:54:19,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:19,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:19,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:19,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:20,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:20,057 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 21 treesize of output 37 [2022-03-01 17:54:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:20,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:20,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:20,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:20,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:20,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:20,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026714474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:20,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:20,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:54:20,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802836559] [2022-03-01 17:54:20,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:20,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:54:20,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:20,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:54:20,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:54:20,660 INFO L87 Difference]: Start difference. First operand 5606 states and 24381 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:21,374 INFO L93 Difference]: Finished difference Result 5950 states and 25713 transitions. [2022-03-01 17:54:21,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:54:21,374 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:21,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:21,389 INFO L225 Difference]: With dead ends: 5950 [2022-03-01 17:54:21,389 INFO L226 Difference]: Without dead ends: 5928 [2022-03-01 17:54:21,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:54:21,390 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:21,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 286 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 779 Invalid, 0 Unknown, 61 Unchecked, 0.4s Time] [2022-03-01 17:54:21,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5928 states. [2022-03-01 17:54:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5928 to 5615. [2022-03-01 17:54:21,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5615 states, 5614 states have (on average 4.348592803705023) internal successors, (24413), 5614 states have internal predecessors, (24413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:21,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5615 states to 5615 states and 24413 transitions. [2022-03-01 17:54:21,508 INFO L78 Accepts]: Start accepts. Automaton has 5615 states and 24413 transitions. Word has length 23 [2022-03-01 17:54:21,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:21,508 INFO L470 AbstractCegarLoop]: Abstraction has 5615 states and 24413 transitions. [2022-03-01 17:54:21,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:21,508 INFO L276 IsEmpty]: Start isEmpty. Operand 5615 states and 24413 transitions. [2022-03-01 17:54:21,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:21,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:21,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:21,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-03-01 17:54:21,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-03-01 17:54:21,719 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:21,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:21,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1292573164, now seen corresponding path program 107 times [2022-03-01 17:54:21,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:21,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262714058] [2022-03-01 17:54:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:21,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:21,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:21,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262714058] [2022-03-01 17:54:21,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262714058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:21,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87973232] [2022-03-01 17:54:21,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:21,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:21,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:21,854 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:21,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-01 17:54:21,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:54:21,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:21,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:21,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:21,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:22,000 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 21 treesize of output 37 [2022-03-01 17:54:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:22,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:22,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:22,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:22,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:22,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:22,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87973232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:22,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:22,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:54:22,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743913951] [2022-03-01 17:54:22,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:22,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:54:22,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:22,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:54:22,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:54:22,665 INFO L87 Difference]: Start difference. First operand 5615 states and 24413 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:23,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:23,416 INFO L93 Difference]: Finished difference Result 5981 states and 25830 transitions. [2022-03-01 17:54:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:54:23,416 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:23,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:23,432 INFO L225 Difference]: With dead ends: 5981 [2022-03-01 17:54:23,432 INFO L226 Difference]: Without dead ends: 5957 [2022-03-01 17:54:23,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:54:23,432 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 168 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:23,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 254 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 696 Invalid, 0 Unknown, 151 Unchecked, 0.3s Time] [2022-03-01 17:54:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5957 states. [2022-03-01 17:54:23,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5957 to 5608. [2022-03-01 17:54:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5608 states, 5607 states have (on average 4.349741394685215) internal successors, (24389), 5607 states have internal predecessors, (24389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5608 states to 5608 states and 24389 transitions. [2022-03-01 17:54:23,562 INFO L78 Accepts]: Start accepts. Automaton has 5608 states and 24389 transitions. Word has length 23 [2022-03-01 17:54:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:23,562 INFO L470 AbstractCegarLoop]: Abstraction has 5608 states and 24389 transitions. [2022-03-01 17:54:23,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 5608 states and 24389 transitions. [2022-03-01 17:54:23,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:23,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:23,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:23,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-03-01 17:54:23,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-03-01 17:54:23,772 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:23,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:23,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1579694516, now seen corresponding path program 108 times [2022-03-01 17:54:23,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:23,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044369765] [2022-03-01 17:54:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:23,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:23,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:23,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044369765] [2022-03-01 17:54:23,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044369765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:23,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948087582] [2022-03-01 17:54:23,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:23,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:23,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:23,905 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:23,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-01 17:54:23,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:54:23,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:23,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:54:23,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:24,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:24,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:24,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:24,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2022-03-01 17:54:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:24,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:24,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:24,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:24,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:24,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:24,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948087582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:24,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:24,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:54:24,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401886612] [2022-03-01 17:54:24,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:24,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:54:24,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:24,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:54:24,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:54:24,545 INFO L87 Difference]: Start difference. First operand 5608 states and 24389 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:25,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:25,317 INFO L93 Difference]: Finished difference Result 6035 states and 26011 transitions. [2022-03-01 17:54:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:54:25,317 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:25,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:25,332 INFO L225 Difference]: With dead ends: 6035 [2022-03-01 17:54:25,332 INFO L226 Difference]: Without dead ends: 5987 [2022-03-01 17:54:25,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:54:25,333 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 126 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:25,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 356 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 883 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2022-03-01 17:54:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5987 states. [2022-03-01 17:54:25,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5987 to 5614. [2022-03-01 17:54:25,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5614 states, 5613 states have (on average 4.349367539640121) internal successors, (24413), 5613 states have internal predecessors, (24413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5614 states to 5614 states and 24413 transitions. [2022-03-01 17:54:25,470 INFO L78 Accepts]: Start accepts. Automaton has 5614 states and 24413 transitions. Word has length 23 [2022-03-01 17:54:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:25,470 INFO L470 AbstractCegarLoop]: Abstraction has 5614 states and 24413 transitions. [2022-03-01 17:54:25,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5614 states and 24413 transitions. [2022-03-01 17:54:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:25,479 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:25,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:25,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-03-01 17:54:25,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-03-01 17:54:25,680 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:25,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:25,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2072911902, now seen corresponding path program 109 times [2022-03-01 17:54:25,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:25,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809065908] [2022-03-01 17:54:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:25,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:25,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:25,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809065908] [2022-03-01 17:54:25,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809065908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:25,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635844519] [2022-03-01 17:54:25,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:25,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:25,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:25,812 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:25,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-01 17:54:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:25,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:25,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:25,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:25,953 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 25 treesize of output 41 [2022-03-01 17:54:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:26,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:26,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:26,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:26,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:26,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:26,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635844519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:26,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:26,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:54:26,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821454866] [2022-03-01 17:54:26,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:26,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:54:26,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:26,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:54:26,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:54:26,601 INFO L87 Difference]: Start difference. First operand 5614 states and 24413 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:27,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:27,329 INFO L93 Difference]: Finished difference Result 5924 states and 25578 transitions. [2022-03-01 17:54:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:54:27,330 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:27,344 INFO L225 Difference]: With dead ends: 5924 [2022-03-01 17:54:27,344 INFO L226 Difference]: Without dead ends: 5888 [2022-03-01 17:54:27,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:54:27,345 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 100 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:27,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 376 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1057 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-03-01 17:54:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5888 states. [2022-03-01 17:54:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5888 to 5610. [2022-03-01 17:54:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5610 states, 5609 states have (on average 4.349616687466572) internal successors, (24397), 5609 states have internal predecessors, (24397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5610 states to 5610 states and 24397 transitions. [2022-03-01 17:54:27,494 INFO L78 Accepts]: Start accepts. Automaton has 5610 states and 24397 transitions. Word has length 23 [2022-03-01 17:54:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:27,494 INFO L470 AbstractCegarLoop]: Abstraction has 5610 states and 24397 transitions. [2022-03-01 17:54:27,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 5610 states and 24397 transitions. [2022-03-01 17:54:27,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:27,507 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:27,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:27,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-03-01 17:54:27,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:27,707 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:27,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:27,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1138135646, now seen corresponding path program 110 times [2022-03-01 17:54:27,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:27,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176748163] [2022-03-01 17:54:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:27,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:27,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:27,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176748163] [2022-03-01 17:54:27,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176748163] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:27,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726706758] [2022-03-01 17:54:27,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:27,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:27,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:27,847 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:27,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-01 17:54:27,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:27,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:27,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:27,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:27,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:27,985 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 21 treesize of output 37 [2022-03-01 17:54:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:28,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:28,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:28,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:28,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:28,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:28,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726706758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:28,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:28,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:54:28,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170594746] [2022-03-01 17:54:28,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:28,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:54:28,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:28,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:54:28,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:54:28,637 INFO L87 Difference]: Start difference. First operand 5610 states and 24397 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:29,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:29,468 INFO L93 Difference]: Finished difference Result 5938 states and 25669 transitions. [2022-03-01 17:54:29,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:54:29,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:29,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:29,483 INFO L225 Difference]: With dead ends: 5938 [2022-03-01 17:54:29,483 INFO L226 Difference]: Without dead ends: 5917 [2022-03-01 17:54:29,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:54:29,483 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 162 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:29,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 331 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 773 Invalid, 0 Unknown, 157 Unchecked, 0.3s Time] [2022-03-01 17:54:29,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5917 states. [2022-03-01 17:54:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5917 to 5614. [2022-03-01 17:54:29,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5614 states, 5613 states have (on average 4.349367539640121) internal successors, (24413), 5613 states have internal predecessors, (24413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5614 states to 5614 states and 24413 transitions. [2022-03-01 17:54:29,633 INFO L78 Accepts]: Start accepts. Automaton has 5614 states and 24413 transitions. Word has length 23 [2022-03-01 17:54:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:29,633 INFO L470 AbstractCegarLoop]: Abstraction has 5614 states and 24413 transitions. [2022-03-01 17:54:29,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 5614 states and 24413 transitions. [2022-03-01 17:54:29,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:29,643 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:29,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:29,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-03-01 17:54:29,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:29,844 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:29,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:29,844 INFO L85 PathProgramCache]: Analyzing trace with hash 2144139118, now seen corresponding path program 111 times [2022-03-01 17:54:29,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:29,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998885346] [2022-03-01 17:54:29,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:29,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:29,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:29,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998885346] [2022-03-01 17:54:29,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998885346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:29,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528571248] [2022-03-01 17:54:29,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:29,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:29,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:29,982 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:29,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-01 17:54:30,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:54:30,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:30,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:30,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:30,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:30,152 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 17:54:30,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 55 [2022-03-01 17:54:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:30,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:30,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528571248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:30,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:30,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:54:30,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206970132] [2022-03-01 17:54:30,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:30,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:30,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:30,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:30,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:30,560 INFO L87 Difference]: Start difference. First operand 5614 states and 24413 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:32,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:32,888 INFO L93 Difference]: Finished difference Result 6529 states and 28016 transitions. [2022-03-01 17:54:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:54:32,889 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:32,907 INFO L225 Difference]: With dead ends: 6529 [2022-03-01 17:54:32,907 INFO L226 Difference]: Without dead ends: 6499 [2022-03-01 17:54:32,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=588, Invalid=3968, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 17:54:32,908 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 381 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:32,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 594 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:54:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6499 states. [2022-03-01 17:54:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6499 to 5626. [2022-03-01 17:54:33,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5626 states, 5625 states have (on average 4.349866666666666) internal successors, (24468), 5625 states have internal predecessors, (24468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:33,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 24468 transitions. [2022-03-01 17:54:33,022 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 24468 transitions. Word has length 23 [2022-03-01 17:54:33,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:33,022 INFO L470 AbstractCegarLoop]: Abstraction has 5626 states and 24468 transitions. [2022-03-01 17:54:33,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 24468 transitions. [2022-03-01 17:54:33,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:33,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:33,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:33,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:33,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2022-03-01 17:54:33,232 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:33,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:33,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1128024012, now seen corresponding path program 112 times [2022-03-01 17:54:33,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:33,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390553181] [2022-03-01 17:54:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:33,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:33,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:33,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390553181] [2022-03-01 17:54:33,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390553181] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:33,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223025273] [2022-03-01 17:54:33,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:33,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:33,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:33,346 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:33,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-01 17:54:33,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:33,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:33,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:33,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:33,616 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-03-01 17:54:33,617 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 76 [2022-03-01 17:54:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:33,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:34,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:34,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-01 17:54:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:34,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223025273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:34,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:34,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:54:34,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572505220] [2022-03-01 17:54:34,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:34,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:34,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:34,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:34,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:34,092 INFO L87 Difference]: Start difference. First operand 5626 states and 24468 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:35,974 INFO L93 Difference]: Finished difference Result 6349 states and 27305 transitions. [2022-03-01 17:54:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:54:35,974 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:35,990 INFO L225 Difference]: With dead ends: 6349 [2022-03-01 17:54:35,990 INFO L226 Difference]: Without dead ends: 6319 [2022-03-01 17:54:35,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=461, Invalid=2089, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:54:35,991 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 218 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 479 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:35,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 557 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1050 Invalid, 0 Unknown, 479 Unchecked, 0.5s Time] [2022-03-01 17:54:35,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6319 states. [2022-03-01 17:54:36,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6319 to 5646. [2022-03-01 17:54:36,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5646 states, 5645 states have (on average 4.352170062001772) internal successors, (24568), 5645 states have internal predecessors, (24568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5646 states to 5646 states and 24568 transitions. [2022-03-01 17:54:36,093 INFO L78 Accepts]: Start accepts. Automaton has 5646 states and 24568 transitions. Word has length 23 [2022-03-01 17:54:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:36,093 INFO L470 AbstractCegarLoop]: Abstraction has 5646 states and 24568 transitions. [2022-03-01 17:54:36,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 5646 states and 24568 transitions. [2022-03-01 17:54:36,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:36,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:36,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:36,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-03-01 17:54:36,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-03-01 17:54:36,304 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:36,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:36,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1713357964, now seen corresponding path program 113 times [2022-03-01 17:54:36,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:36,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119581122] [2022-03-01 17:54:36,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:36,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:36,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:36,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119581122] [2022-03-01 17:54:36,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119581122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:36,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142779333] [2022-03-01 17:54:36,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:36,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:36,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:36,425 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:36,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-01 17:54:36,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:54:36,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:36,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:36,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:36,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:36,581 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 21 treesize of output 37 [2022-03-01 17:54:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:36,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:37,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:37,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:37,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:37,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:37,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142779333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:37,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:37,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:54:37,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072544834] [2022-03-01 17:54:37,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:37,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:54:37,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:37,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:54:37,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:54:37,104 INFO L87 Difference]: Start difference. First operand 5646 states and 24568 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:37,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:37,661 INFO L93 Difference]: Finished difference Result 5818 states and 25211 transitions. [2022-03-01 17:54:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:54:37,661 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:37,676 INFO L225 Difference]: With dead ends: 5818 [2022-03-01 17:54:37,676 INFO L226 Difference]: Without dead ends: 5796 [2022-03-01 17:54:37,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:54:37,677 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 102 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:37,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 333 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 771 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-03-01 17:54:37,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5796 states. [2022-03-01 17:54:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5796 to 5644. [2022-03-01 17:54:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5644 states, 5643 states have (on average 4.352472089314195) internal successors, (24561), 5643 states have internal predecessors, (24561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:37,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5644 states to 5644 states and 24561 transitions. [2022-03-01 17:54:37,818 INFO L78 Accepts]: Start accepts. Automaton has 5644 states and 24561 transitions. Word has length 23 [2022-03-01 17:54:37,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:37,818 INFO L470 AbstractCegarLoop]: Abstraction has 5644 states and 24561 transitions. [2022-03-01 17:54:37,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:37,818 INFO L276 IsEmpty]: Start isEmpty. Operand 5644 states and 24561 transitions. [2022-03-01 17:54:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:37,829 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:37,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:37,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-03-01 17:54:38,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:38,030 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:38,030 INFO L85 PathProgramCache]: Analyzing trace with hash -407481374, now seen corresponding path program 114 times [2022-03-01 17:54:38,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:38,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664664] [2022-03-01 17:54:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:38,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:38,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:38,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664664] [2022-03-01 17:54:38,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:38,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570923800] [2022-03-01 17:54:38,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:38,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:38,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:38,144 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:38,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-01 17:54:38,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:54:38,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:38,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:38,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:38,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:38,349 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 22 treesize of output 38 [2022-03-01 17:54:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:38,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:38,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:38,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:38,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:38,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:38,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570923800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:38,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:38,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:54:38,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720827640] [2022-03-01 17:54:38,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:38,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:54:38,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:38,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:54:38,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:54:38,828 INFO L87 Difference]: Start difference. First operand 5644 states and 24561 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:39,308 INFO L93 Difference]: Finished difference Result 5854 states and 25356 transitions. [2022-03-01 17:54:39,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:54:39,308 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:39,322 INFO L225 Difference]: With dead ends: 5854 [2022-03-01 17:54:39,322 INFO L226 Difference]: Without dead ends: 5839 [2022-03-01 17:54:39,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:54:39,322 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 104 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:39,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 369 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 792 Invalid, 0 Unknown, 38 Unchecked, 0.3s Time] [2022-03-01 17:54:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5839 states. [2022-03-01 17:54:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5839 to 5642. [2022-03-01 17:54:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5642 states, 5641 states have (on average 4.352951604325474) internal successors, (24555), 5641 states have internal predecessors, (24555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5642 states to 5642 states and 24555 transitions. [2022-03-01 17:54:39,417 INFO L78 Accepts]: Start accepts. Automaton has 5642 states and 24555 transitions. Word has length 23 [2022-03-01 17:54:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:39,417 INFO L470 AbstractCegarLoop]: Abstraction has 5642 states and 24555 transitions. [2022-03-01 17:54:39,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 5642 states and 24555 transitions. [2022-03-01 17:54:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:39,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:39,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:39,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-03-01 17:54:39,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:39,628 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:39,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:39,628 INFO L85 PathProgramCache]: Analyzing trace with hash 264335778, now seen corresponding path program 115 times [2022-03-01 17:54:39,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:39,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224960422] [2022-03-01 17:54:39,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:39,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:39,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:39,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224960422] [2022-03-01 17:54:39,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224960422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:39,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749692718] [2022-03-01 17:54:39,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:39,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:39,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:39,746 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:39,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-01 17:54:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:39,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:39,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:39,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:39,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:40,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:40,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 46 [2022-03-01 17:54:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:40,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:40,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:40,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-01 17:54:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:40,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749692718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:40,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:40,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:54:40,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129838167] [2022-03-01 17:54:40,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:40,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:40,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:40,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:40,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:40,501 INFO L87 Difference]: Start difference. First operand 5642 states and 24555 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:42,932 INFO L93 Difference]: Finished difference Result 6588 states and 28278 transitions. [2022-03-01 17:54:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 17:54:42,933 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:42,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:42,950 INFO L225 Difference]: With dead ends: 6588 [2022-03-01 17:54:42,950 INFO L226 Difference]: Without dead ends: 6558 [2022-03-01 17:54:42,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=621, Invalid=2919, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:54:42,951 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 243 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 870 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:42,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 684 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1153 Invalid, 0 Unknown, 870 Unchecked, 0.5s Time] [2022-03-01 17:54:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6558 states. [2022-03-01 17:54:43,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6558 to 5676. [2022-03-01 17:54:43,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5676 states, 5675 states have (on average 4.355066079295154) internal successors, (24715), 5675 states have internal predecessors, (24715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:43,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5676 states to 5676 states and 24715 transitions. [2022-03-01 17:54:43,053 INFO L78 Accepts]: Start accepts. Automaton has 5676 states and 24715 transitions. Word has length 23 [2022-03-01 17:54:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:43,053 INFO L470 AbstractCegarLoop]: Abstraction has 5676 states and 24715 transitions. [2022-03-01 17:54:43,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 5676 states and 24715 transitions. [2022-03-01 17:54:43,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:43,063 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:43,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:43,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-03-01 17:54:43,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:43,263 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:43,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:43,264 INFO L85 PathProgramCache]: Analyzing trace with hash 777862630, now seen corresponding path program 116 times [2022-03-01 17:54:43,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:43,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854753001] [2022-03-01 17:54:43,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:43,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:43,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:43,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854753001] [2022-03-01 17:54:43,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854753001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:43,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419588474] [2022-03-01 17:54:43,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:43,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:43,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:43,388 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:43,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-03-01 17:54:43,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:43,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:43,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:43,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:43,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:43,571 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 25 treesize of output 41 [2022-03-01 17:54:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:43,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:44,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:44,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:44,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:44,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:44,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419588474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:44,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:44,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:54:44,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040804455] [2022-03-01 17:54:44,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:44,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:54:44,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:44,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:54:44,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:54:44,118 INFO L87 Difference]: Start difference. First operand 5676 states and 24715 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:44,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:44,965 INFO L93 Difference]: Finished difference Result 5941 states and 25711 transitions. [2022-03-01 17:54:44,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:54:44,965 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:44,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:44,980 INFO L225 Difference]: With dead ends: 5941 [2022-03-01 17:54:44,981 INFO L226 Difference]: Without dead ends: 5920 [2022-03-01 17:54:44,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=1235, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:54:44,981 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 181 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:44,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 371 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 918 Invalid, 0 Unknown, 139 Unchecked, 0.4s Time] [2022-03-01 17:54:44,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5920 states. [2022-03-01 17:54:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5920 to 5680. [2022-03-01 17:54:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5680 states, 5679 states have (on average 4.35481598873041) internal successors, (24731), 5679 states have internal predecessors, (24731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5680 states to 5680 states and 24731 transitions. [2022-03-01 17:54:45,075 INFO L78 Accepts]: Start accepts. Automaton has 5680 states and 24731 transitions. Word has length 23 [2022-03-01 17:54:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:45,075 INFO L470 AbstractCegarLoop]: Abstraction has 5680 states and 24731 transitions. [2022-03-01 17:54:45,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:45,076 INFO L276 IsEmpty]: Start isEmpty. Operand 5680 states and 24731 transitions. [2022-03-01 17:54:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:45,085 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:45,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:45,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:45,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:45,286 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:45,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1853573786, now seen corresponding path program 117 times [2022-03-01 17:54:45,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:45,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460126715] [2022-03-01 17:54:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:45,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:45,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:45,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460126715] [2022-03-01 17:54:45,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460126715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:45,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310603686] [2022-03-01 17:54:45,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:45,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:45,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:45,411 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:45,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-03-01 17:54:45,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:54:45,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:45,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:54:45,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:45,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:45,577 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 39 treesize of output 55 [2022-03-01 17:54:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:45,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:45,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:45,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:45,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:45,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:45,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310603686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:45,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:45,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:54:45,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974333441] [2022-03-01 17:54:45,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:45,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:54:45,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:45,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:54:45,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:54:45,907 INFO L87 Difference]: Start difference. First operand 5680 states and 24731 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:48,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:48,293 INFO L93 Difference]: Finished difference Result 5892 states and 25528 transitions. [2022-03-01 17:54:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:54:48,293 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:48,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:48,308 INFO L225 Difference]: With dead ends: 5892 [2022-03-01 17:54:48,308 INFO L226 Difference]: Without dead ends: 5877 [2022-03-01 17:54:48,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=191, Invalid=927, Unknown=4, NotChecked=0, Total=1122 [2022-03-01 17:54:48,308 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 124 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:48,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 309 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 679 Invalid, 0 Unknown, 340 Unchecked, 0.3s Time] [2022-03-01 17:54:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5877 states. [2022-03-01 17:54:48,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5877 to 5676. [2022-03-01 17:54:48,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5676 states, 5675 states have (on average 4.355066079295154) internal successors, (24715), 5675 states have internal predecessors, (24715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5676 states to 5676 states and 24715 transitions. [2022-03-01 17:54:48,401 INFO L78 Accepts]: Start accepts. Automaton has 5676 states and 24715 transitions. Word has length 23 [2022-03-01 17:54:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:48,401 INFO L470 AbstractCegarLoop]: Abstraction has 5676 states and 24715 transitions. [2022-03-01 17:54:48,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5676 states and 24715 transitions. [2022-03-01 17:54:48,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:48,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:48,412 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:48,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-03-01 17:54:48,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-03-01 17:54:48,613 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:48,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:48,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2024388718, now seen corresponding path program 118 times [2022-03-01 17:54:48,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:48,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059257213] [2022-03-01 17:54:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:48,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:48,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:48,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059257213] [2022-03-01 17:54:48,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059257213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:48,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540171569] [2022-03-01 17:54:48,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:48,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:48,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:48,728 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:48,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-03-01 17:54:48,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:48,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:48,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:48,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:48,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:48,903 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 22 treesize of output 38 [2022-03-01 17:54:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:49,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:49,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:49,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:49,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:49,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:49,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540171569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:49,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:49,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:54:49,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508166595] [2022-03-01 17:54:49,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:49,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:54:49,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:49,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:54:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:54:49,637 INFO L87 Difference]: Start difference. First operand 5676 states and 24715 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:50,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:50,176 INFO L93 Difference]: Finished difference Result 5885 states and 25502 transitions. [2022-03-01 17:54:50,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:54:50,176 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:50,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:50,191 INFO L225 Difference]: With dead ends: 5885 [2022-03-01 17:54:50,191 INFO L226 Difference]: Without dead ends: 5870 [2022-03-01 17:54:50,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:54:50,192 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 98 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:50,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 430 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 989 Invalid, 0 Unknown, 35 Unchecked, 0.4s Time] [2022-03-01 17:54:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5870 states. [2022-03-01 17:54:50,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5870 to 5676. [2022-03-01 17:54:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5676 states, 5675 states have (on average 4.355066079295154) internal successors, (24715), 5675 states have internal predecessors, (24715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5676 states to 5676 states and 24715 transitions. [2022-03-01 17:54:50,295 INFO L78 Accepts]: Start accepts. Automaton has 5676 states and 24715 transitions. Word has length 23 [2022-03-01 17:54:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:50,295 INFO L470 AbstractCegarLoop]: Abstraction has 5676 states and 24715 transitions. [2022-03-01 17:54:50,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 5676 states and 24715 transitions. [2022-03-01 17:54:50,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:50,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:50,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:50,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:50,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:50,529 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:50,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash 920138636, now seen corresponding path program 119 times [2022-03-01 17:54:50,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:50,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702400723] [2022-03-01 17:54:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:50,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:50,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:50,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702400723] [2022-03-01 17:54:50,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702400723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:50,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53191905] [2022-03-01 17:54:50,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:50,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:50,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:50,663 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:50,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-03-01 17:54:50,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:54:50,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:50,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:50,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:50,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:50,842 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 29 treesize of output 41 [2022-03-01 17:54:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:51,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:51,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:51,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:51,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:51,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:51,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53191905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:51,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:51,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-01 17:54:51,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674023407] [2022-03-01 17:54:51,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:51,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:54:51,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:51,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:54:51,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:54:51,304 INFO L87 Difference]: Start difference. First operand 5676 states and 24715 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:52,106 INFO L93 Difference]: Finished difference Result 5965 states and 25823 transitions. [2022-03-01 17:54:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:54:52,106 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:52,122 INFO L225 Difference]: With dead ends: 5965 [2022-03-01 17:54:52,123 INFO L226 Difference]: Without dead ends: 5950 [2022-03-01 17:54:52,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:52,123 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 149 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:52,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 405 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:54:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5950 states. [2022-03-01 17:54:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5950 to 5680. [2022-03-01 17:54:52,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5680 states, 5679 states have (on average 4.355168163409051) internal successors, (24733), 5679 states have internal predecessors, (24733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5680 states to 5680 states and 24733 transitions. [2022-03-01 17:54:52,225 INFO L78 Accepts]: Start accepts. Automaton has 5680 states and 24733 transitions. Word has length 23 [2022-03-01 17:54:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:52,225 INFO L470 AbstractCegarLoop]: Abstraction has 5680 states and 24733 transitions. [2022-03-01 17:54:52,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 5680 states and 24733 transitions. [2022-03-01 17:54:52,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:52,235 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:52,235 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:52,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:52,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-03-01 17:54:52,436 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash -407956592, now seen corresponding path program 120 times [2022-03-01 17:54:52,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:52,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055339126] [2022-03-01 17:54:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:52,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:52,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:52,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055339126] [2022-03-01 17:54:52,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055339126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:52,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541249354] [2022-03-01 17:54:52,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:52,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:52,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:52,595 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:52,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-03-01 17:54:52,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:54:52,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:52,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:54:52,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:52,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:52,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:52,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:52,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2022-03-01 17:54:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:52,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:53,133 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-01 17:54:53,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2022-03-01 17:54:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:53,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541249354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:53,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:53,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-03-01 17:54:53,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033369971] [2022-03-01 17:54:53,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:53,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:54:53,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:53,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:54:53,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:54:53,162 INFO L87 Difference]: Start difference. First operand 5680 states and 24733 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:55,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:55,194 INFO L93 Difference]: Finished difference Result 6906 states and 29499 transitions. [2022-03-01 17:54:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:54:55,195 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:55,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:55,213 INFO L225 Difference]: With dead ends: 6906 [2022-03-01 17:54:55,214 INFO L226 Difference]: Without dead ends: 6864 [2022-03-01 17:54:55,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=472, Invalid=3068, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:54:55,214 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 441 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 2492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:55,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 953 Invalid, 2492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2266 Invalid, 0 Unknown, 48 Unchecked, 1.0s Time] [2022-03-01 17:54:55,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6864 states. [2022-03-01 17:54:55,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6864 to 5720. [2022-03-01 17:54:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5720 states, 5719 states have (on average 4.356181150550795) internal successors, (24913), 5719 states have internal predecessors, (24913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5720 states to 5720 states and 24913 transitions. [2022-03-01 17:54:55,323 INFO L78 Accepts]: Start accepts. Automaton has 5720 states and 24913 transitions. Word has length 23 [2022-03-01 17:54:55,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:55,323 INFO L470 AbstractCegarLoop]: Abstraction has 5720 states and 24913 transitions. [2022-03-01 17:54:55,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:55,323 INFO L276 IsEmpty]: Start isEmpty. Operand 5720 states and 24913 transitions. [2022-03-01 17:54:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:55,333 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:55,333 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:55,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:55,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-01 17:54:55,533 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:55,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:55,533 INFO L85 PathProgramCache]: Analyzing trace with hash 667754564, now seen corresponding path program 121 times [2022-03-01 17:54:55,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:55,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462142768] [2022-03-01 17:54:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:55,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:55,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:55,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462142768] [2022-03-01 17:54:55,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462142768] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:55,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533440231] [2022-03-01 17:54:55,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:55,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:55,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:55,661 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:55,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-03-01 17:54:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:55,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:55,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:55,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:55,827 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 26 treesize of output 40 [2022-03-01 17:54:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:56,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:56,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:56,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:56,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:56,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:56,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533440231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:56,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:56,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:54:56,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165353738] [2022-03-01 17:54:56,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:56,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:54:56,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:56,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:54:56,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:54:56,415 INFO L87 Difference]: Start difference. First operand 5720 states and 24913 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:58,073 INFO L93 Difference]: Finished difference Result 6088 states and 26311 transitions. [2022-03-01 17:54:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:54:58,074 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:54:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:58,088 INFO L225 Difference]: With dead ends: 6088 [2022-03-01 17:54:58,089 INFO L226 Difference]: Without dead ends: 6073 [2022-03-01 17:54:58,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:54:58,089 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 189 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:58,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 540 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:54:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6073 states. [2022-03-01 17:54:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6073 to 5720. [2022-03-01 17:54:58,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5720 states, 5719 states have (on average 4.356181150550795) internal successors, (24913), 5719 states have internal predecessors, (24913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5720 states to 5720 states and 24913 transitions. [2022-03-01 17:54:58,183 INFO L78 Accepts]: Start accepts. Automaton has 5720 states and 24913 transitions. Word has length 23 [2022-03-01 17:54:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:58,183 INFO L470 AbstractCegarLoop]: Abstraction has 5720 states and 24913 transitions. [2022-03-01 17:54:58,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 5720 states and 24913 transitions. [2022-03-01 17:54:58,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:54:58,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:58,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:58,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:58,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-03-01 17:54:58,393 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:54:58,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:58,394 INFO L85 PathProgramCache]: Analyzing trace with hash -830493052, now seen corresponding path program 122 times [2022-03-01 17:54:58,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:58,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429676716] [2022-03-01 17:54:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:58,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:58,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:58,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429676716] [2022-03-01 17:54:58,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429676716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:58,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623356372] [2022-03-01 17:54:58,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:58,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:58,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:58,514 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:58,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-03-01 17:54:58,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:58,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:58,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:58,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:58,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:58,704 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 33 treesize of output 45 [2022-03-01 17:54:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:58,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:59,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:59,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:54:59,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:59,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:54:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:59,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623356372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:59,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:59,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:54:59,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2716702] [2022-03-01 17:54:59,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:59,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:54:59,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:59,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:54:59,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:54:59,169 INFO L87 Difference]: Start difference. First operand 5720 states and 24913 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:00,171 INFO L93 Difference]: Finished difference Result 5988 states and 25933 transitions. [2022-03-01 17:55:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:55:00,171 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:00,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:00,186 INFO L225 Difference]: With dead ends: 5988 [2022-03-01 17:55:00,186 INFO L226 Difference]: Without dead ends: 5973 [2022-03-01 17:55:00,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:55:00,186 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 126 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:00,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 485 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:55:00,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2022-03-01 17:55:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 5720. [2022-03-01 17:55:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5720 states, 5719 states have (on average 4.356181150550795) internal successors, (24913), 5719 states have internal predecessors, (24913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5720 states to 5720 states and 24913 transitions. [2022-03-01 17:55:00,286 INFO L78 Accepts]: Start accepts. Automaton has 5720 states and 24913 transitions. Word has length 23 [2022-03-01 17:55:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:00,286 INFO L470 AbstractCegarLoop]: Abstraction has 5720 states and 24913 transitions. [2022-03-01 17:55:00,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:00,286 INFO L276 IsEmpty]: Start isEmpty. Operand 5720 states and 24913 transitions. [2022-03-01 17:55:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:00,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:00,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:00,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-03-01 17:55:00,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:00,497 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:00,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:00,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1586307978, now seen corresponding path program 123 times [2022-03-01 17:55:00,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:00,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509228757] [2022-03-01 17:55:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:00,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:00,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:00,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509228757] [2022-03-01 17:55:00,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509228757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:00,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826925378] [2022-03-01 17:55:00,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:00,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:00,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:00,622 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:00,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-03-01 17:55:00,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:55:00,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:00,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:55:00,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:00,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:00,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-03-01 17:55:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:00,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:01,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:01,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:01,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:01,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:01,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826925378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:01,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:01,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:55:01,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882423620] [2022-03-01 17:55:01,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:01,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:55:01,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:01,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:55:01,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:55:01,162 INFO L87 Difference]: Start difference. First operand 5720 states and 24913 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:02,090 INFO L93 Difference]: Finished difference Result 6715 states and 28772 transitions. [2022-03-01 17:55:02,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:55:02,090 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:02,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:02,109 INFO L225 Difference]: With dead ends: 6715 [2022-03-01 17:55:02,109 INFO L226 Difference]: Without dead ends: 6665 [2022-03-01 17:55:02,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:55:02,109 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 253 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:02,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 581 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1107 Invalid, 0 Unknown, 141 Unchecked, 0.5s Time] [2022-03-01 17:55:02,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6665 states. [2022-03-01 17:55:02,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6665 to 5728. [2022-03-01 17:55:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5728 states, 5727 states have (on average 4.355508992491706) internal successors, (24944), 5727 states have internal predecessors, (24944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:02,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5728 states to 5728 states and 24944 transitions. [2022-03-01 17:55:02,243 INFO L78 Accepts]: Start accepts. Automaton has 5728 states and 24944 transitions. Word has length 23 [2022-03-01 17:55:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:02,243 INFO L470 AbstractCegarLoop]: Abstraction has 5728 states and 24944 transitions. [2022-03-01 17:55:02,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:02,243 INFO L276 IsEmpty]: Start isEmpty. Operand 5728 states and 24944 transitions. [2022-03-01 17:55:02,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:02,253 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:02,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:02,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-03-01 17:55:02,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:02,454 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:02,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:02,454 INFO L85 PathProgramCache]: Analyzing trace with hash -510596822, now seen corresponding path program 124 times [2022-03-01 17:55:02,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:02,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060968666] [2022-03-01 17:55:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:02,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:02,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:02,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060968666] [2022-03-01 17:55:02,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060968666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:02,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298328388] [2022-03-01 17:55:02,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:02,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:02,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:02,582 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:02,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-03-01 17:55:02,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:02,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:02,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:02,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:02,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:02,740 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 21 treesize of output 37 [2022-03-01 17:55:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:03,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:03,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:03,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:03,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:03,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:03,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298328388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:03,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:03,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:55:03,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728322701] [2022-03-01 17:55:03,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:03,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:55:03,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:03,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:55:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:55:03,310 INFO L87 Difference]: Start difference. First operand 5728 states and 24944 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:04,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:04,212 INFO L93 Difference]: Finished difference Result 6231 states and 26881 transitions. [2022-03-01 17:55:04,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:55:04,212 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:04,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:04,237 INFO L225 Difference]: With dead ends: 6231 [2022-03-01 17:55:04,237 INFO L226 Difference]: Without dead ends: 6210 [2022-03-01 17:55:04,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:55:04,237 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 209 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:04,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 583 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1267 Invalid, 0 Unknown, 133 Unchecked, 0.5s Time] [2022-03-01 17:55:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6210 states. [2022-03-01 17:55:04,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6210 to 5732. [2022-03-01 17:55:04,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5732 states, 5731 states have (on average 4.355260861978712) internal successors, (24960), 5731 states have internal predecessors, (24960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5732 states to 5732 states and 24960 transitions. [2022-03-01 17:55:04,333 INFO L78 Accepts]: Start accepts. Automaton has 5732 states and 24960 transitions. Word has length 23 [2022-03-01 17:55:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:04,333 INFO L470 AbstractCegarLoop]: Abstraction has 5732 states and 24960 transitions. [2022-03-01 17:55:04,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 5732 states and 24960 transitions. [2022-03-01 17:55:04,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:04,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:04,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:04,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:04,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:04,566 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:04,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:04,567 INFO L85 PathProgramCache]: Analyzing trace with hash -845355880, now seen corresponding path program 125 times [2022-03-01 17:55:04,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:04,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737755639] [2022-03-01 17:55:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:04,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:04,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:04,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737755639] [2022-03-01 17:55:04,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737755639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:04,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9274658] [2022-03-01 17:55:04,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:55:04,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:04,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:04,683 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:04,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-03-01 17:55:04,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:55:04,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:04,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:55:04,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:04,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:04,862 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 56 [2022-03-01 17:55:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:04,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:05,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:05,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:05,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:05,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:05,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9274658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:05,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:05,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-01 17:55:05,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906666937] [2022-03-01 17:55:05,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:05,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:55:05,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:05,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:55:05,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:55:05,090 INFO L87 Difference]: Start difference. First operand 5732 states and 24960 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:05,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:05,716 INFO L93 Difference]: Finished difference Result 6415 states and 27594 transitions. [2022-03-01 17:55:05,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:55:05,717 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:05,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:05,734 INFO L225 Difference]: With dead ends: 6415 [2022-03-01 17:55:05,734 INFO L226 Difference]: Without dead ends: 6392 [2022-03-01 17:55:05,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:55:05,735 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 127 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 526 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:05,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 649 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1175 Invalid, 0 Unknown, 526 Unchecked, 0.5s Time] [2022-03-01 17:55:05,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6392 states. [2022-03-01 17:55:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6392 to 5760. [2022-03-01 17:55:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5760 states, 5759 states have (on average 4.353533599583261) internal successors, (25072), 5759 states have internal predecessors, (25072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5760 states to 5760 states and 25072 transitions. [2022-03-01 17:55:05,837 INFO L78 Accepts]: Start accepts. Automaton has 5760 states and 25072 transitions. Word has length 23 [2022-03-01 17:55:05,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:05,837 INFO L470 AbstractCegarLoop]: Abstraction has 5760 states and 25072 transitions. [2022-03-01 17:55:05,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 5760 states and 25072 transitions. [2022-03-01 17:55:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:05,847 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:05,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:05,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-03-01 17:55:06,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:06,048 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:06,048 INFO L85 PathProgramCache]: Analyzing trace with hash 459224340, now seen corresponding path program 126 times [2022-03-01 17:55:06,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:06,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406673090] [2022-03-01 17:55:06,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:06,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:06,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:06,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406673090] [2022-03-01 17:55:06,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406673090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:06,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948852553] [2022-03-01 17:55:06,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:55:06,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:06,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:06,166 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:06,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-03-01 17:55:06,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:55:06,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:06,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:55:06,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:06,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:06,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-03-01 17:55:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:06,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:06,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:06,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:06,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:06,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:06,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948852553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:06,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:06,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:55:06,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296865653] [2022-03-01 17:55:06,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:06,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:55:06,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:06,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:55:06,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:55:06,659 INFO L87 Difference]: Start difference. First operand 5760 states and 25072 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:07,357 INFO L93 Difference]: Finished difference Result 6374 states and 27438 transitions. [2022-03-01 17:55:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:55:07,357 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:07,373 INFO L225 Difference]: With dead ends: 6374 [2022-03-01 17:55:07,373 INFO L226 Difference]: Without dead ends: 6357 [2022-03-01 17:55:07,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:55:07,373 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 176 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:07,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 587 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1211 Invalid, 0 Unknown, 134 Unchecked, 0.5s Time] [2022-03-01 17:55:07,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6357 states. [2022-03-01 17:55:07,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6357 to 5736. [2022-03-01 17:55:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5736 states, 5735 states have (on average 4.355361813426329) internal successors, (24978), 5735 states have internal predecessors, (24978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5736 states to 5736 states and 24978 transitions. [2022-03-01 17:55:07,470 INFO L78 Accepts]: Start accepts. Automaton has 5736 states and 24978 transitions. Word has length 23 [2022-03-01 17:55:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:07,470 INFO L470 AbstractCegarLoop]: Abstraction has 5736 states and 24978 transitions. [2022-03-01 17:55:07,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5736 states and 24978 transitions. [2022-03-01 17:55:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:07,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:07,480 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:07,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:07,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:07,680 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:07,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:07,681 INFO L85 PathProgramCache]: Analyzing trace with hash -257610558, now seen corresponding path program 127 times [2022-03-01 17:55:07,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:07,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856155894] [2022-03-01 17:55:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:07,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:07,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:07,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856155894] [2022-03-01 17:55:07,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856155894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:07,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984685827] [2022-03-01 17:55:07,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:07,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:07,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:07,806 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:07,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-03-01 17:55:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:07,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:07,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:07,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:07,953 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 21 treesize of output 37 [2022-03-01 17:55:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:08,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:08,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:08,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:08,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:08,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:08,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984685827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:08,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:08,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:55:08,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245763133] [2022-03-01 17:55:08,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:08,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:55:08,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:08,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:55:08,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:55:08,468 INFO L87 Difference]: Start difference. First operand 5736 states and 24978 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:09,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:09,416 INFO L93 Difference]: Finished difference Result 6248 states and 26943 transitions. [2022-03-01 17:55:09,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:55:09,416 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:09,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:09,433 INFO L225 Difference]: With dead ends: 6248 [2022-03-01 17:55:09,434 INFO L226 Difference]: Without dead ends: 6223 [2022-03-01 17:55:09,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:55:09,434 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 220 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:09,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 493 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1105 Invalid, 0 Unknown, 227 Unchecked, 0.5s Time] [2022-03-01 17:55:09,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6223 states. [2022-03-01 17:55:09,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6223 to 5738. [2022-03-01 17:55:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5738 states, 5737 states have (on average 4.355586543489629) internal successors, (24988), 5737 states have internal predecessors, (24988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5738 states to 5738 states and 24988 transitions. [2022-03-01 17:55:09,580 INFO L78 Accepts]: Start accepts. Automaton has 5738 states and 24988 transitions. Word has length 23 [2022-03-01 17:55:09,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:09,580 INFO L470 AbstractCegarLoop]: Abstraction has 5738 states and 24988 transitions. [2022-03-01 17:55:09,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:09,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5738 states and 24988 transitions. [2022-03-01 17:55:09,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:09,590 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:09,590 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:09,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-03-01 17:55:09,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:09,790 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:09,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:09,791 INFO L85 PathProgramCache]: Analyzing trace with hash 818100598, now seen corresponding path program 128 times [2022-03-01 17:55:09,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:09,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108716496] [2022-03-01 17:55:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:09,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:09,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:09,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108716496] [2022-03-01 17:55:09,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108716496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:09,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695248986] [2022-03-01 17:55:09,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:09,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:09,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:09,920 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:09,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-03-01 17:55:09,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:09,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:09,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:10,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:10,077 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 21 treesize of output 37 [2022-03-01 17:55:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:10,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:10,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:10,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:10,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:10,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:10,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695248986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:10,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:10,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:55:10,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553213004] [2022-03-01 17:55:10,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:10,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:55:10,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:10,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:55:10,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:55:10,622 INFO L87 Difference]: Start difference. First operand 5738 states and 24988 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:11,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:11,410 INFO L93 Difference]: Finished difference Result 6259 states and 26992 transitions. [2022-03-01 17:55:11,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:55:11,410 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:11,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:11,426 INFO L225 Difference]: With dead ends: 6259 [2022-03-01 17:55:11,426 INFO L226 Difference]: Without dead ends: 6238 [2022-03-01 17:55:11,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:55:11,426 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 222 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:11,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 466 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 952 Invalid, 0 Unknown, 51 Unchecked, 0.4s Time] [2022-03-01 17:55:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2022-03-01 17:55:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 5732. [2022-03-01 17:55:11,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5732 states, 5731 states have (on average 4.355260861978712) internal successors, (24960), 5731 states have internal predecessors, (24960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5732 states to 5732 states and 24960 transitions. [2022-03-01 17:55:11,522 INFO L78 Accepts]: Start accepts. Automaton has 5732 states and 24960 transitions. Word has length 23 [2022-03-01 17:55:11,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:11,522 INFO L470 AbstractCegarLoop]: Abstraction has 5732 states and 24960 transitions. [2022-03-01 17:55:11,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:11,523 INFO L276 IsEmpty]: Start isEmpty. Operand 5732 states and 24960 transitions. [2022-03-01 17:55:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:11,533 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:11,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:11,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:11,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:11,734 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:11,734 INFO L85 PathProgramCache]: Analyzing trace with hash 596230688, now seen corresponding path program 129 times [2022-03-01 17:55:11,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:11,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397090248] [2022-03-01 17:55:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:11,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:11,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:11,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397090248] [2022-03-01 17:55:11,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397090248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:11,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403671791] [2022-03-01 17:55:11,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:11,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:11,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:11,861 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:11,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-03-01 17:55:11,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:55:11,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:11,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:55:11,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:12,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:12,091 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:55:12,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 55 [2022-03-01 17:55:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:12,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:12,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403671791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:12,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:12,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:55:12,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501953109] [2022-03-01 17:55:12,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:12,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:12,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:12,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:12,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:12,469 INFO L87 Difference]: Start difference. First operand 5732 states and 24960 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2022-03-01 17:55:15,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:15,082 INFO L93 Difference]: Finished difference Result 7402 states and 31628 transitions. [2022-03-01 17:55:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 17:55:15,082 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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 23 [2022-03-01 17:55:15,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:15,104 INFO L225 Difference]: With dead ends: 7402 [2022-03-01 17:55:15,104 INFO L226 Difference]: Without dead ends: 7345 [2022-03-01 17:55:15,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=508, Invalid=3652, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 17:55:15,105 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 498 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 2641 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 2826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:15,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 971 Invalid, 2826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2641 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 17:55:15,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7345 states. [2022-03-01 17:55:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7345 to 5786. [2022-03-01 17:55:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5786 states, 5785 states have (on average 4.3602420051858255) internal successors, (25224), 5785 states have internal predecessors, (25224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5786 states to 5786 states and 25224 transitions. [2022-03-01 17:55:15,232 INFO L78 Accepts]: Start accepts. Automaton has 5786 states and 25224 transitions. Word has length 23 [2022-03-01 17:55:15,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:15,233 INFO L470 AbstractCegarLoop]: Abstraction has 5786 states and 25224 transitions. [2022-03-01 17:55:15,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2022-03-01 17:55:15,233 INFO L276 IsEmpty]: Start isEmpty. Operand 5786 states and 25224 transitions. [2022-03-01 17:55:15,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:15,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:15,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:15,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-03-01 17:55:15,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-03-01 17:55:15,469 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:15,469 INFO L85 PathProgramCache]: Analyzing trace with hash 173694228, now seen corresponding path program 130 times [2022-03-01 17:55:15,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:15,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405552324] [2022-03-01 17:55:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:15,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:15,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:15,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405552324] [2022-03-01 17:55:15,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405552324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:15,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503036684] [2022-03-01 17:55:15,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:15,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:15,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:15,593 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:15,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-03-01 17:55:15,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:15,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:15,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:15,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:15,797 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 22 treesize of output 38 [2022-03-01 17:55:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:18,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:18,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:18,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:18,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:18,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:18,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503036684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:18,275 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:18,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:55:18,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575190781] [2022-03-01 17:55:18,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:18,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:55:18,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:18,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:55:18,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=429, Unknown=1, NotChecked=0, Total=506 [2022-03-01 17:55:18,276 INFO L87 Difference]: Start difference. First operand 5786 states and 25224 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:18,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:18,868 INFO L93 Difference]: Finished difference Result 6079 states and 26343 transitions. [2022-03-01 17:55:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:55:18,868 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:18,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:18,883 INFO L225 Difference]: With dead ends: 6079 [2022-03-01 17:55:18,883 INFO L226 Difference]: Without dead ends: 6056 [2022-03-01 17:55:18,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=119, Invalid=692, Unknown=1, NotChecked=0, Total=812 [2022-03-01 17:55:18,883 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 103 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:18,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 539 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1129 Invalid, 0 Unknown, 92 Unchecked, 0.4s Time] [2022-03-01 17:55:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6056 states. [2022-03-01 17:55:18,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6056 to 5786. [2022-03-01 17:55:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5786 states, 5785 states have (on average 4.3602420051858255) internal successors, (25224), 5785 states have internal predecessors, (25224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5786 states to 5786 states and 25224 transitions. [2022-03-01 17:55:18,978 INFO L78 Accepts]: Start accepts. Automaton has 5786 states and 25224 transitions. Word has length 23 [2022-03-01 17:55:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:18,978 INFO L470 AbstractCegarLoop]: Abstraction has 5786 states and 25224 transitions. [2022-03-01 17:55:18,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 5786 states and 25224 transitions. [2022-03-01 17:55:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:18,988 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:18,988 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:19,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-03-01 17:55:19,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-03-01 17:55:19,191 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:19,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:19,191 INFO L85 PathProgramCache]: Analyzing trace with hash 148954170, now seen corresponding path program 131 times [2022-03-01 17:55:19,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:19,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167703402] [2022-03-01 17:55:19,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:19,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:19,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:19,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167703402] [2022-03-01 17:55:19,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167703402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:19,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890741432] [2022-03-01 17:55:19,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:55:19,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:19,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:19,314 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:19,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-03-01 17:55:19,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:55:19,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:19,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:19,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:19,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:19,496 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 22 treesize of output 38 [2022-03-01 17:55:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:19,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:19,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:19,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:19,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:19,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:19,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890741432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:19,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:19,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:55:19,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100804929] [2022-03-01 17:55:19,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:19,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:55:19,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:19,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:55:19,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:55:19,986 INFO L87 Difference]: Start difference. First operand 5786 states and 25224 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:20,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:20,756 INFO L93 Difference]: Finished difference Result 6086 states and 26371 transitions. [2022-03-01 17:55:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:55:20,756 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:20,771 INFO L225 Difference]: With dead ends: 6086 [2022-03-01 17:55:20,771 INFO L226 Difference]: Without dead ends: 6064 [2022-03-01 17:55:20,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:55:20,772 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 127 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:20,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 527 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1199 Invalid, 0 Unknown, 68 Unchecked, 0.5s Time] [2022-03-01 17:55:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6064 states. [2022-03-01 17:55:20,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6064 to 5792. [2022-03-01 17:55:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5791 states have (on average 4.360386807114488) internal successors, (25251), 5791 states have internal predecessors, (25251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 25251 transitions. [2022-03-01 17:55:20,864 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 25251 transitions. Word has length 23 [2022-03-01 17:55:20,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:20,864 INFO L470 AbstractCegarLoop]: Abstraction has 5792 states and 25251 transitions. [2022-03-01 17:55:20,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:20,864 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 25251 transitions. [2022-03-01 17:55:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:20,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:20,874 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:20,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:21,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-03-01 17:55:21,074 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:21,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:21,075 INFO L85 PathProgramCache]: Analyzing trace with hash 734288122, now seen corresponding path program 132 times [2022-03-01 17:55:21,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:21,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525773393] [2022-03-01 17:55:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:21,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:21,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:21,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525773393] [2022-03-01 17:55:21,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525773393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:21,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785840459] [2022-03-01 17:55:21,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:55:21,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:21,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:21,196 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:21,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-01 17:55:21,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:55:21,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:21,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:21,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:21,378 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-03-01 17:55:21,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 51 [2022-03-01 17:55:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:21,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:21,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785840459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:21,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:21,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-03-01 17:55:21,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101788148] [2022-03-01 17:55:21,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:21,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:55:21,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:21,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:55:21,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:55:21,664 INFO L87 Difference]: Start difference. First operand 5792 states and 25251 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) [2022-03-01 17:55:22,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:22,779 INFO L93 Difference]: Finished difference Result 6914 states and 29620 transitions. [2022-03-01 17:55:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 17:55:22,780 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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 23 [2022-03-01 17:55:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:22,797 INFO L225 Difference]: With dead ends: 6914 [2022-03-01 17:55:22,797 INFO L226 Difference]: Without dead ends: 6862 [2022-03-01 17:55:22,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:55:22,798 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 296 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:22,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 492 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:55:22,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6862 states. [2022-03-01 17:55:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6862 to 5818. [2022-03-01 17:55:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5818 states, 5817 states have (on average 4.3625580195977305) internal successors, (25377), 5817 states have internal predecessors, (25377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5818 states to 5818 states and 25377 transitions. [2022-03-01 17:55:22,928 INFO L78 Accepts]: Start accepts. Automaton has 5818 states and 25377 transitions. Word has length 23 [2022-03-01 17:55:22,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:22,928 INFO L470 AbstractCegarLoop]: Abstraction has 5818 states and 25377 transitions. [2022-03-01 17:55:22,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) [2022-03-01 17:55:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 5818 states and 25377 transitions. [2022-03-01 17:55:22,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:22,938 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:22,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:22,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-03-01 17:55:23,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:23,138 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:23,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:23,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1947112440, now seen corresponding path program 133 times [2022-03-01 17:55:23,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:23,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234996717] [2022-03-01 17:55:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:23,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:23,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:23,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234996717] [2022-03-01 17:55:23,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234996717] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:23,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767107895] [2022-03-01 17:55:23,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:23,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:23,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:23,261 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:23,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-01 17:55:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:23,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:23,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:23,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:23,494 INFO L353 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2022-03-01 17:55:23,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 76 [2022-03-01 17:55:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:23,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:23,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:23,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-01 17:55:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:24,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767107895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:24,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:24,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:55:24,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102460086] [2022-03-01 17:55:24,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:24,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:55:24,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:24,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:55:24,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:55:24,087 INFO L87 Difference]: Start difference. First operand 5818 states and 25377 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:26,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:26,769 INFO L93 Difference]: Finished difference Result 7788 states and 33033 transitions. [2022-03-01 17:55:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 17:55:26,770 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:26,789 INFO L225 Difference]: With dead ends: 7788 [2022-03-01 17:55:26,789 INFO L226 Difference]: Without dead ends: 7739 [2022-03-01 17:55:26,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=871, Invalid=4099, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 17:55:26,790 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 411 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:26,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 749 Invalid, 2507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1881 Invalid, 0 Unknown, 328 Unchecked, 1.0s Time] [2022-03-01 17:55:26,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7739 states. [2022-03-01 17:55:26,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7739 to 5866. [2022-03-01 17:55:26,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5866 states, 5865 states have (on average 4.365728900255754) internal successors, (25605), 5865 states have internal predecessors, (25605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5866 states to 5866 states and 25605 transitions. [2022-03-01 17:55:26,906 INFO L78 Accepts]: Start accepts. Automaton has 5866 states and 25605 transitions. Word has length 23 [2022-03-01 17:55:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:26,906 INFO L470 AbstractCegarLoop]: Abstraction has 5866 states and 25605 transitions. [2022-03-01 17:55:26,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 5866 states and 25605 transitions. [2022-03-01 17:55:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:26,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:26,917 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:26,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-03-01 17:55:27,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2022-03-01 17:55:27,117 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:27,117 INFO L85 PathProgramCache]: Analyzing trace with hash -78267210, now seen corresponding path program 134 times [2022-03-01 17:55:27,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:27,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037126215] [2022-03-01 17:55:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:27,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:27,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:27,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037126215] [2022-03-01 17:55:27,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037126215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:27,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478192887] [2022-03-01 17:55:27,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:27,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:27,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:27,282 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:27,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-01 17:55:27,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:27,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:27,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:27,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:27,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:27,460 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 22 treesize of output 38 [2022-03-01 17:55:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:27,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:27,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:27,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:27,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:27,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:27,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478192887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:27,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:27,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:55:27,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721511701] [2022-03-01 17:55:27,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:27,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:55:27,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:27,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:55:27,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:55:27,950 INFO L87 Difference]: Start difference. First operand 5866 states and 25605 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:28,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:28,472 INFO L93 Difference]: Finished difference Result 6113 states and 26542 transitions. [2022-03-01 17:55:28,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:55:28,473 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:28,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:28,489 INFO L225 Difference]: With dead ends: 6113 [2022-03-01 17:55:28,489 INFO L226 Difference]: Without dead ends: 6091 [2022-03-01 17:55:28,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:55:28,502 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 95 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:28,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 512 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1033 Invalid, 0 Unknown, 104 Unchecked, 0.4s Time] [2022-03-01 17:55:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6091 states. [2022-03-01 17:55:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6091 to 5870. [2022-03-01 17:55:28,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5870 states, 5869 states have (on average 4.365820412336003) internal successors, (25623), 5869 states have internal predecessors, (25623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:28,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5870 states to 5870 states and 25623 transitions. [2022-03-01 17:55:28,602 INFO L78 Accepts]: Start accepts. Automaton has 5870 states and 25623 transitions. Word has length 23 [2022-03-01 17:55:28,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:28,603 INFO L470 AbstractCegarLoop]: Abstraction has 5870 states and 25623 transitions. [2022-03-01 17:55:28,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:28,603 INFO L276 IsEmpty]: Start isEmpty. Operand 5870 states and 25623 transitions. [2022-03-01 17:55:28,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:28,613 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:28,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:28,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:28,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-03-01 17:55:28,813 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:28,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:28,814 INFO L85 PathProgramCache]: Analyzing trace with hash 435259642, now seen corresponding path program 135 times [2022-03-01 17:55:28,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:28,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020918988] [2022-03-01 17:55:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:28,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:28,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:28,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020918988] [2022-03-01 17:55:28,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020918988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:28,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246192365] [2022-03-01 17:55:28,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:28,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:28,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:28,943 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:28,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-01 17:55:28,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:55:28,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:28,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:28,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:29,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:29,103 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 21 treesize of output 37 [2022-03-01 17:55:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:29,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:29,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:29,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:29,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:29,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:29,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246192365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:29,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:29,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:55:29,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552135475] [2022-03-01 17:55:29,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:29,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:55:29,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:55:29,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:55:29,662 INFO L87 Difference]: Start difference. First operand 5870 states and 25623 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:30,662 INFO L93 Difference]: Finished difference Result 6325 states and 27365 transitions. [2022-03-01 17:55:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:55:30,663 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:55:30,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:30,678 INFO L225 Difference]: With dead ends: 6325 [2022-03-01 17:55:30,678 INFO L226 Difference]: Without dead ends: 6300 [2022-03-01 17:55:30,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=1671, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:55:30,679 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 196 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:30,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 454 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1014 Invalid, 0 Unknown, 80 Unchecked, 0.4s Time] [2022-03-01 17:55:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2022-03-01 17:55:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 5872. [2022-03-01 17:55:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5872 states, 5871 states have (on average 4.366036450349174) internal successors, (25633), 5871 states have internal predecessors, (25633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5872 states to 5872 states and 25633 transitions. [2022-03-01 17:55:30,808 INFO L78 Accepts]: Start accepts. Automaton has 5872 states and 25633 transitions. Word has length 23 [2022-03-01 17:55:30,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:30,808 INFO L470 AbstractCegarLoop]: Abstraction has 5872 states and 25633 transitions. [2022-03-01 17:55:30,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 5872 states and 25633 transitions. [2022-03-01 17:55:30,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:30,819 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:30,819 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:30,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:31,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:31,019 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:31,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1510970798, now seen corresponding path program 136 times [2022-03-01 17:55:31,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:31,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840336149] [2022-03-01 17:55:31,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:31,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:31,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:31,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840336149] [2022-03-01 17:55:31,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840336149] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:31,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963348292] [2022-03-01 17:55:31,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:31,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:31,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:31,155 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:31,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-01 17:55:31,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:31,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:31,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:31,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:31,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:31,393 INFO L353 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2022-03-01 17:55:31,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 76 [2022-03-01 17:55:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:32,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:32,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:32,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-01 17:55:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:32,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963348292] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:32,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:32,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:55:32,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996498454] [2022-03-01 17:55:32,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:32,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:32,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:32,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:32,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:32,858 INFO L87 Difference]: Start difference. First operand 5872 states and 25633 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2022-03-01 17:55:45,147 WARN L228 SmtUtils]: Spent 5.96s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-01 17:55:45,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:45,216 INFO L93 Difference]: Finished difference Result 8673 states and 36629 transitions. [2022-03-01 17:55:45,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-01 17:55:45,216 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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 23 [2022-03-01 17:55:45,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:45,238 INFO L225 Difference]: With dead ends: 8673 [2022-03-01 17:55:45,238 INFO L226 Difference]: Without dead ends: 8624 [2022-03-01 17:55:45,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=931, Invalid=4921, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 17:55:45,239 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 351 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 2800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:45,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 891 Invalid, 2800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 2189 Invalid, 0 Unknown, 334 Unchecked, 1.0s Time] [2022-03-01 17:55:45,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8624 states. [2022-03-01 17:55:45,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8624 to 5900. [2022-03-01 17:55:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5900 states, 5899 states have (on average 4.367011357857264) internal successors, (25761), 5899 states have internal predecessors, (25761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5900 states to 5900 states and 25761 transitions. [2022-03-01 17:55:45,356 INFO L78 Accepts]: Start accepts. Automaton has 5900 states and 25761 transitions. Word has length 23 [2022-03-01 17:55:45,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:45,356 INFO L470 AbstractCegarLoop]: Abstraction has 5900 states and 25761 transitions. [2022-03-01 17:55:45,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2022-03-01 17:55:45,356 INFO L276 IsEmpty]: Start isEmpty. Operand 5900 states and 25761 transitions. [2022-03-01 17:55:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:45,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:45,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:45,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-03-01 17:55:45,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:45,566 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:45,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:45,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1791966650, now seen corresponding path program 137 times [2022-03-01 17:55:45,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:45,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554907388] [2022-03-01 17:55:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:45,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:45,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:45,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554907388] [2022-03-01 17:55:45,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554907388] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:45,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854655366] [2022-03-01 17:55:45,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:55:45,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:45,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:45,709 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:45,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-01 17:55:45,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:55:45,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:45,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:45,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:45,861 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 21 treesize of output 37 [2022-03-01 17:55:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:46,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:46,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:46,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:46,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:46,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:46,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854655366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:46,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:46,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:55:46,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501208334] [2022-03-01 17:55:46,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:46,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:55:46,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:46,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:55:46,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:55:46,477 INFO L87 Difference]: Start difference. First operand 5900 states and 25761 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:47,338 INFO L93 Difference]: Finished difference Result 6310 states and 27327 transitions. [2022-03-01 17:55:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:55:47,339 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:47,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:47,355 INFO L225 Difference]: With dead ends: 6310 [2022-03-01 17:55:47,355 INFO L226 Difference]: Without dead ends: 6284 [2022-03-01 17:55:47,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:55:47,355 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 159 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:47,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 340 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 895 Invalid, 0 Unknown, 66 Unchecked, 0.4s Time] [2022-03-01 17:55:47,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6284 states. [2022-03-01 17:55:47,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6284 to 5909. [2022-03-01 17:55:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5909 states, 5908 states have (on average 4.365775220040623) internal successors, (25793), 5908 states have internal predecessors, (25793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5909 states to 5909 states and 25793 transitions. [2022-03-01 17:55:47,461 INFO L78 Accepts]: Start accepts. Automaton has 5909 states and 25793 transitions. Word has length 23 [2022-03-01 17:55:47,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:47,461 INFO L470 AbstractCegarLoop]: Abstraction has 5909 states and 25793 transitions. [2022-03-01 17:55:47,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5909 states and 25793 transitions. [2022-03-01 17:55:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:47,472 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:47,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:47,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-03-01 17:55:47,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:47,673 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:47,673 INFO L85 PathProgramCache]: Analyzing trace with hash 750390582, now seen corresponding path program 138 times [2022-03-01 17:55:47,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:47,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779200561] [2022-03-01 17:55:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:47,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:47,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:47,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779200561] [2022-03-01 17:55:47,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779200561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:47,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487692579] [2022-03-01 17:55:47,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:55:47,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:47,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:47,827 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:47,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-01 17:55:47,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:55:47,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:47,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:47,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:47,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:47,982 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 25 treesize of output 41 [2022-03-01 17:55:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:48,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:48,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:48,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:48,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:48,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:49,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487692579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:49,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:49,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:55:49,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511408812] [2022-03-01 17:55:49,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:49,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:55:49,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:49,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:55:49,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:55:49,041 INFO L87 Difference]: Start difference. First operand 5909 states and 25793 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:50,091 INFO L93 Difference]: Finished difference Result 6319 states and 27365 transitions. [2022-03-01 17:55:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:55:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:50,108 INFO L225 Difference]: With dead ends: 6319 [2022-03-01 17:55:50,108 INFO L226 Difference]: Without dead ends: 6291 [2022-03-01 17:55:50,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:55:50,109 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 149 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:50,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 485 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1286 Invalid, 0 Unknown, 88 Unchecked, 0.5s Time] [2022-03-01 17:55:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6291 states. [2022-03-01 17:55:50,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6291 to 5902. [2022-03-01 17:55:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5902 states, 5901 states have (on average 4.366886968310456) internal successors, (25769), 5901 states have internal predecessors, (25769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 25769 transitions. [2022-03-01 17:55:50,209 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 25769 transitions. Word has length 23 [2022-03-01 17:55:50,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:50,210 INFO L470 AbstractCegarLoop]: Abstraction has 5902 states and 25769 transitions. [2022-03-01 17:55:50,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 25769 transitions. [2022-03-01 17:55:50,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:50,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:50,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:50,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:50,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:50,421 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:50,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:50,421 INFO L85 PathProgramCache]: Analyzing trace with hash 463269230, now seen corresponding path program 139 times [2022-03-01 17:55:50,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:50,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145351057] [2022-03-01 17:55:50,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:50,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:50,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:50,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145351057] [2022-03-01 17:55:50,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145351057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:50,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128361468] [2022-03-01 17:55:50,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:50,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:50,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:50,570 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:50,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-01 17:55:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:50,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:50,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:50,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:50,733 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 25 treesize of output 41 [2022-03-01 17:55:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:51,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:51,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:51,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:51,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:51,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:51,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128361468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:51,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:51,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:55:51,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317669705] [2022-03-01 17:55:51,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:51,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:55:51,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:51,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:55:51,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:55:51,314 INFO L87 Difference]: Start difference. First operand 5902 states and 25769 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:51,930 INFO L93 Difference]: Finished difference Result 6202 states and 26904 transitions. [2022-03-01 17:55:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:55:51,931 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:51,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:51,947 INFO L225 Difference]: With dead ends: 6202 [2022-03-01 17:55:51,948 INFO L226 Difference]: Without dead ends: 6176 [2022-03-01 17:55:51,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:55:51,948 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 108 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:51,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 411 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 883 Invalid, 0 Unknown, 128 Unchecked, 0.4s Time] [2022-03-01 17:55:51,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2022-03-01 17:55:52,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 5902. [2022-03-01 17:55:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5902 states, 5901 states have (on average 4.366886968310456) internal successors, (25769), 5901 states have internal predecessors, (25769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 25769 transitions. [2022-03-01 17:55:52,088 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 25769 transitions. Word has length 23 [2022-03-01 17:55:52,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:52,088 INFO L470 AbstractCegarLoop]: Abstraction has 5902 states and 25769 transitions. [2022-03-01 17:55:52,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 25769 transitions. [2022-03-01 17:55:52,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:52,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:52,099 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:52,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:52,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-03-01 17:55:52,300 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:52,301 INFO L85 PathProgramCache]: Analyzing trace with hash -29948156, now seen corresponding path program 140 times [2022-03-01 17:55:52,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:52,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694136783] [2022-03-01 17:55:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:52,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:52,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:52,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694136783] [2022-03-01 17:55:52,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694136783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:52,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664820800] [2022-03-01 17:55:52,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:52,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:52,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:52,438 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:52,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-01 17:55:52,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:52,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:52,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:52,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:52,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:52,579 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 21 treesize of output 37 [2022-03-01 17:55:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:53,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:53,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:53,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:53,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:53,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:53,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664820800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:53,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:53,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:55:53,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941989880] [2022-03-01 17:55:53,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:53,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:55:53,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:53,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:55:53,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:55:53,213 INFO L87 Difference]: Start difference. First operand 5902 states and 25769 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:53,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:53,685 INFO L93 Difference]: Finished difference Result 6124 states and 26595 transitions. [2022-03-01 17:55:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:55:53,686 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:53,701 INFO L225 Difference]: With dead ends: 6124 [2022-03-01 17:55:53,701 INFO L226 Difference]: Without dead ends: 6103 [2022-03-01 17:55:53,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:55:53,701 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 127 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:53,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 285 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 697 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-03-01 17:55:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6103 states. [2022-03-01 17:55:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6103 to 5902. [2022-03-01 17:55:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5902 states, 5901 states have (on average 4.366886968310456) internal successors, (25769), 5901 states have internal predecessors, (25769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 25769 transitions. [2022-03-01 17:55:53,806 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 25769 transitions. Word has length 23 [2022-03-01 17:55:53,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:53,806 INFO L470 AbstractCegarLoop]: Abstraction has 5902 states and 25769 transitions. [2022-03-01 17:55:53,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:53,806 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 25769 transitions. [2022-03-01 17:55:53,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:53,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:53,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:53,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:54,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-03-01 17:55:54,020 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash 904828100, now seen corresponding path program 141 times [2022-03-01 17:55:54,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:54,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589302879] [2022-03-01 17:55:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:54,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:54,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:54,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589302879] [2022-03-01 17:55:54,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589302879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:54,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564223735] [2022-03-01 17:55:54,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:54,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:54,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:54,173 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:54,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-01 17:55:54,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:55:54,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:54,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:54,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:54,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:54,330 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 21 treesize of output 37 [2022-03-01 17:55:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:54,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:54,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:54,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:55:54,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:54,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:55:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:55,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564223735] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:55,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:55,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:55:55,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905370463] [2022-03-01 17:55:55,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:55,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:55:55,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:55,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:55:55,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:55:55,017 INFO L87 Difference]: Start difference. First operand 5902 states and 25769 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:55,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:55,825 INFO L93 Difference]: Finished difference Result 6259 states and 27132 transitions. [2022-03-01 17:55:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:55:55,826 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:55:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:55,841 INFO L225 Difference]: With dead ends: 6259 [2022-03-01 17:55:55,841 INFO L226 Difference]: Without dead ends: 6234 [2022-03-01 17:55:55,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:55:55,842 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 166 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:55,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 417 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1119 Invalid, 0 Unknown, 173 Unchecked, 0.5s Time] [2022-03-01 17:55:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6234 states. [2022-03-01 17:55:55,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6234 to 5904. [2022-03-01 17:55:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5904 states, 5903 states have (on average 4.367101473826867) internal successors, (25779), 5903 states have internal predecessors, (25779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5904 states to 5904 states and 25779 transitions. [2022-03-01 17:55:55,940 INFO L78 Accepts]: Start accepts. Automaton has 5904 states and 25779 transitions. Word has length 23 [2022-03-01 17:55:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:55,940 INFO L470 AbstractCegarLoop]: Abstraction has 5904 states and 25779 transitions. [2022-03-01 17:55:55,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 5904 states and 25779 transitions. [2022-03-01 17:55:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:55:55,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:55,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:55,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:56,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:56,154 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:55:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash -107864432, now seen corresponding path program 142 times [2022-03-01 17:55:56,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:56,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289870430] [2022-03-01 17:55:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:56,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:56,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:56,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289870430] [2022-03-01 17:55:56,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289870430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:56,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275851262] [2022-03-01 17:55:56,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:56,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:56,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:56,303 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:56,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-01 17:55:56,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:56,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:56,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:55:56,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:56,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:56,507 INFO L353 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2022-03-01 17:55:56,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 78 [2022-03-01 17:55:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:59,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:59,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:59,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-01 17:55:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:59,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275851262] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:59,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:59,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:55:59,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986545767] [2022-03-01 17:55:59,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:59,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:59,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:59,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:59,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:59,879 INFO L87 Difference]: Start difference. First operand 5904 states and 25779 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:05,136 INFO L93 Difference]: Finished difference Result 6681 states and 28756 transitions. [2022-03-01 17:56:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 17:56:05,136 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:05,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:05,154 INFO L225 Difference]: With dead ends: 6681 [2022-03-01 17:56:05,154 INFO L226 Difference]: Without dead ends: 6632 [2022-03-01 17:56:05,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=523, Invalid=3017, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:56:05,155 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 328 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:05,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 566 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1053 Invalid, 0 Unknown, 187 Unchecked, 0.6s Time] [2022-03-01 17:56:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6632 states. [2022-03-01 17:56:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6632 to 5918. [2022-03-01 17:56:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5918 states, 5917 states have (on average 4.369274970424201) internal successors, (25853), 5917 states have internal predecessors, (25853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:05,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5918 states to 5918 states and 25853 transitions. [2022-03-01 17:56:05,268 INFO L78 Accepts]: Start accepts. Automaton has 5918 states and 25853 transitions. Word has length 23 [2022-03-01 17:56:05,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:05,268 INFO L470 AbstractCegarLoop]: Abstraction has 5918 states and 25853 transitions. [2022-03-01 17:56:05,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand 5918 states and 25853 transitions. [2022-03-01 17:56:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:05,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:05,279 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:05,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-03-01 17:56:05,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-03-01 17:56:05,479 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:05,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:05,480 INFO L85 PathProgramCache]: Analyzing trace with hash -926889682, now seen corresponding path program 143 times [2022-03-01 17:56:05,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:05,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721741853] [2022-03-01 17:56:05,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:05,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:05,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:05,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721741853] [2022-03-01 17:56:05,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721741853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:05,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308384790] [2022-03-01 17:56:05,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:05,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:05,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:05,629 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:05,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-01 17:56:05,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:56:05,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:05,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:05,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:05,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:05,854 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 22 treesize of output 38 [2022-03-01 17:56:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:06,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:06,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:06,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:06,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:06,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:06,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308384790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:06,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:06,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:56:06,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585332179] [2022-03-01 17:56:06,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:06,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:56:06,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:06,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:56:06,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:56:06,343 INFO L87 Difference]: Start difference. First operand 5918 states and 25853 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:07,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:07,239 INFO L93 Difference]: Finished difference Result 6567 states and 28365 transitions. [2022-03-01 17:56:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:56:07,239 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:07,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:07,256 INFO L225 Difference]: With dead ends: 6567 [2022-03-01 17:56:07,256 INFO L226 Difference]: Without dead ends: 6545 [2022-03-01 17:56:07,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:56:07,256 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 201 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:07,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 576 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1430 Invalid, 0 Unknown, 184 Unchecked, 0.6s Time] [2022-03-01 17:56:07,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6545 states. [2022-03-01 17:56:07,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6545 to 5924. [2022-03-01 17:56:07,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5924 states, 5923 states have (on average 4.369069728178288) internal successors, (25878), 5923 states have internal predecessors, (25878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5924 states to 5924 states and 25878 transitions. [2022-03-01 17:56:07,363 INFO L78 Accepts]: Start accepts. Automaton has 5924 states and 25878 transitions. Word has length 23 [2022-03-01 17:56:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:07,363 INFO L470 AbstractCegarLoop]: Abstraction has 5924 states and 25878 transitions. [2022-03-01 17:56:07,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:07,364 INFO L276 IsEmpty]: Start isEmpty. Operand 5924 states and 25878 transitions. [2022-03-01 17:56:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:07,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:07,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:07,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-03-01 17:56:07,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2022-03-01 17:56:07,575 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:07,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:07,575 INFO L85 PathProgramCache]: Analyzing trace with hash -413362830, now seen corresponding path program 144 times [2022-03-01 17:56:07,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:07,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818700274] [2022-03-01 17:56:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:07,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:07,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:07,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818700274] [2022-03-01 17:56:07,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818700274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:07,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764525776] [2022-03-01 17:56:07,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:07,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:07,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:07,707 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:07,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-01 17:56:07,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:56:07,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:07,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:07,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:07,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:07,860 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 21 treesize of output 37 [2022-03-01 17:56:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:08,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:08,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:08,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:08,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:08,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:08,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764525776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:08,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:08,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:56:08,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065560467] [2022-03-01 17:56:08,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:08,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:56:08,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:08,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:56:08,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:56:08,435 INFO L87 Difference]: Start difference. First operand 5924 states and 25878 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:09,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:09,490 INFO L93 Difference]: Finished difference Result 6508 states and 28128 transitions. [2022-03-01 17:56:09,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:56:09,491 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:09,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:09,509 INFO L225 Difference]: With dead ends: 6508 [2022-03-01 17:56:09,509 INFO L226 Difference]: Without dead ends: 6483 [2022-03-01 17:56:09,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:56:09,510 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 260 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:09,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 452 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1107 Invalid, 0 Unknown, 181 Unchecked, 0.5s Time] [2022-03-01 17:56:09,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6483 states. [2022-03-01 17:56:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6483 to 5920. [2022-03-01 17:56:09,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5920 states, 5919 states have (on average 4.368981246832235) internal successors, (25860), 5919 states have internal predecessors, (25860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5920 states to 5920 states and 25860 transitions. [2022-03-01 17:56:09,623 INFO L78 Accepts]: Start accepts. Automaton has 5920 states and 25860 transitions. Word has length 23 [2022-03-01 17:56:09,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:09,624 INFO L470 AbstractCegarLoop]: Abstraction has 5920 states and 25860 transitions. [2022-03-01 17:56:09,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:09,624 INFO L276 IsEmpty]: Start isEmpty. Operand 5920 states and 25860 transitions. [2022-03-01 17:56:09,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:09,635 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:09,635 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:09,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:09,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-03-01 17:56:09,835 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:09,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:09,835 INFO L85 PathProgramCache]: Analyzing trace with hash -517382184, now seen corresponding path program 145 times [2022-03-01 17:56:09,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:09,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976814245] [2022-03-01 17:56:09,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:09,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:09,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:09,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976814245] [2022-03-01 17:56:09,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976814245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:09,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076598620] [2022-03-01 17:56:09,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:09,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:09,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:09,957 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:09,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-01 17:56:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:09,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:09,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:10,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:10,134 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 22 treesize of output 38 [2022-03-01 17:56:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:10,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:10,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:10,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:10,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:10,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:10,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076598620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:10,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:10,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:56:10,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790533065] [2022-03-01 17:56:10,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:10,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:56:10,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:10,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:56:10,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:56:10,635 INFO L87 Difference]: Start difference. First operand 5920 states and 25860 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:11,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:11,670 INFO L93 Difference]: Finished difference Result 6584 states and 28412 transitions. [2022-03-01 17:56:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:56:11,671 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:11,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:11,689 INFO L225 Difference]: With dead ends: 6584 [2022-03-01 17:56:11,689 INFO L226 Difference]: Without dead ends: 6553 [2022-03-01 17:56:11,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=1317, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:56:11,689 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 176 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:11,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 679 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1624 Invalid, 0 Unknown, 166 Unchecked, 0.7s Time] [2022-03-01 17:56:11,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6553 states. [2022-03-01 17:56:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6553 to 5926. [2022-03-01 17:56:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 4.369789029535865) internal successors, (25891), 5925 states have internal predecessors, (25891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:11,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 25891 transitions. [2022-03-01 17:56:11,796 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 25891 transitions. Word has length 23 [2022-03-01 17:56:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:11,797 INFO L470 AbstractCegarLoop]: Abstraction has 5926 states and 25891 transitions. [2022-03-01 17:56:11,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:11,797 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 25891 transitions. [2022-03-01 17:56:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:11,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:11,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:11,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-03-01 17:56:12,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-03-01 17:56:12,007 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:12,008 INFO L85 PathProgramCache]: Analyzing trace with hash 70363138, now seen corresponding path program 146 times [2022-03-01 17:56:12,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:12,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655178420] [2022-03-01 17:56:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:12,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:12,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:12,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655178420] [2022-03-01 17:56:12,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655178420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:12,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142926447] [2022-03-01 17:56:12,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:12,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:12,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:12,139 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:12,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-01 17:56:12,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:12,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:12,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:12,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:12,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:12,292 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 21 treesize of output 37 [2022-03-01 17:56:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:12,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:12,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:12,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:12,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:12,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:12,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142926447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:12,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:12,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:56:12,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851391313] [2022-03-01 17:56:12,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:12,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:56:12,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:12,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:56:12,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:56:12,841 INFO L87 Difference]: Start difference. First operand 5926 states and 25891 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:13,937 INFO L93 Difference]: Finished difference Result 6494 states and 28069 transitions. [2022-03-01 17:56:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:56:13,937 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:13,954 INFO L225 Difference]: With dead ends: 6494 [2022-03-01 17:56:13,954 INFO L226 Difference]: Without dead ends: 6469 [2022-03-01 17:56:13,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:56:13,954 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 232 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:13,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 471 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1240 Invalid, 0 Unknown, 205 Unchecked, 0.5s Time] [2022-03-01 17:56:13,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2022-03-01 17:56:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 5928. [2022-03-01 17:56:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5928 states, 5927 states have (on average 4.370001687194196) internal successors, (25901), 5927 states have internal predecessors, (25901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:14,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5928 states to 5928 states and 25901 transitions. [2022-03-01 17:56:14,080 INFO L78 Accepts]: Start accepts. Automaton has 5928 states and 25901 transitions. Word has length 23 [2022-03-01 17:56:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:14,080 INFO L470 AbstractCegarLoop]: Abstraction has 5928 states and 25901 transitions. [2022-03-01 17:56:14,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states and 25901 transitions. [2022-03-01 17:56:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:14,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:14,091 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:14,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-03-01 17:56:14,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:14,291 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:14,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:14,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1146074294, now seen corresponding path program 147 times [2022-03-01 17:56:14,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:14,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620436218] [2022-03-01 17:56:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:14,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:14,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:14,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620436218] [2022-03-01 17:56:14,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620436218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:14,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578579294] [2022-03-01 17:56:14,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:14,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:14,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:14,422 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:14,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-01 17:56:14,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:56:14,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:14,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:56:14,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:14,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:14,622 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:56:14,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2022-03-01 17:56:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:14,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:56:14,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578579294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:14,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:14,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-03-01 17:56:14,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207079928] [2022-03-01 17:56:14,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:14,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:56:14,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:14,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:56:14,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:56:14,959 INFO L87 Difference]: Start difference. First operand 5928 states and 25901 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-03-01 17:56:16,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:16,560 INFO L93 Difference]: Finished difference Result 7452 states and 31951 transitions. [2022-03-01 17:56:16,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 17:56:16,560 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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 23 [2022-03-01 17:56:16,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:16,579 INFO L225 Difference]: With dead ends: 7452 [2022-03-01 17:56:16,580 INFO L226 Difference]: Without dead ends: 7403 [2022-03-01 17:56:16,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=390, Invalid=2366, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:56:16,580 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 344 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:16,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 671 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:56:16,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7403 states. [2022-03-01 17:56:16,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7403 to 6008. [2022-03-01 17:56:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6008 states, 6007 states have (on average 4.379224238388547) internal successors, (26306), 6007 states have internal predecessors, (26306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:16,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6008 states to 6008 states and 26306 transitions. [2022-03-01 17:56:16,726 INFO L78 Accepts]: Start accepts. Automaton has 6008 states and 26306 transitions. Word has length 23 [2022-03-01 17:56:16,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:16,726 INFO L470 AbstractCegarLoop]: Abstraction has 6008 states and 26306 transitions. [2022-03-01 17:56:16,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-03-01 17:56:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 6008 states and 26306 transitions. [2022-03-01 17:56:16,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:16,737 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:16,737 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:16,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:16,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:16,938 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:16,938 INFO L85 PathProgramCache]: Analyzing trace with hash 882361692, now seen corresponding path program 148 times [2022-03-01 17:56:16,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:16,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52001056] [2022-03-01 17:56:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:16,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:17,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:17,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52001056] [2022-03-01 17:56:17,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52001056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:17,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493163908] [2022-03-01 17:56:17,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:17,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:17,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:17,078 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:17,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-03-01 17:56:17,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:17,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:17,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:17,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:17,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:17,240 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 22 treesize of output 38 [2022-03-01 17:56:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:17,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:17,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:17,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:17,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:17,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:17,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493163908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:17,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:17,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:56:17,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209080213] [2022-03-01 17:56:17,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:17,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:56:17,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:17,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:56:17,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:56:17,813 INFO L87 Difference]: Start difference. First operand 6008 states and 26306 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:18,657 INFO L93 Difference]: Finished difference Result 6469 states and 28066 transitions. [2022-03-01 17:56:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:56:18,657 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:18,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:18,673 INFO L225 Difference]: With dead ends: 6469 [2022-03-01 17:56:18,674 INFO L226 Difference]: Without dead ends: 6443 [2022-03-01 17:56:18,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:56:18,674 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 118 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:18,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 500 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1259 Invalid, 0 Unknown, 89 Unchecked, 0.5s Time] [2022-03-01 17:56:18,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6443 states. [2022-03-01 17:56:18,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6443 to 6018. [2022-03-01 17:56:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6018 states, 6017 states have (on average 4.377264417483796) internal successors, (26338), 6017 states have internal predecessors, (26338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6018 states to 6018 states and 26338 transitions. [2022-03-01 17:56:18,828 INFO L78 Accepts]: Start accepts. Automaton has 6018 states and 26338 transitions. Word has length 23 [2022-03-01 17:56:18,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:18,829 INFO L470 AbstractCegarLoop]: Abstraction has 6018 states and 26338 transitions. [2022-03-01 17:56:18,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:18,829 INFO L276 IsEmpty]: Start isEmpty. Operand 6018 states and 26338 transitions. [2022-03-01 17:56:18,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:18,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:18,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:18,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:19,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:19,040 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:19,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:19,041 INFO L85 PathProgramCache]: Analyzing trace with hash -159214376, now seen corresponding path program 149 times [2022-03-01 17:56:19,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:19,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607690133] [2022-03-01 17:56:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:19,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:19,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:19,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607690133] [2022-03-01 17:56:19,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607690133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:19,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700983839] [2022-03-01 17:56:19,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:19,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:19,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:19,169 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:19,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-03-01 17:56:19,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:56:19,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:19,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:19,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:19,326 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 22 treesize of output 38 [2022-03-01 17:56:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:21,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:21,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:21,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:21,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:21,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:21,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700983839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:21,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:21,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:56:21,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763911762] [2022-03-01 17:56:21,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:21,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:56:21,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:21,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:56:21,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=560, Unknown=1, NotChecked=0, Total=650 [2022-03-01 17:56:21,930 INFO L87 Difference]: Start difference. First operand 6018 states and 26338 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:22,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:22,696 INFO L93 Difference]: Finished difference Result 6423 states and 27888 transitions. [2022-03-01 17:56:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:56:22,696 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:22,712 INFO L225 Difference]: With dead ends: 6423 [2022-03-01 17:56:22,712 INFO L226 Difference]: Without dead ends: 6395 [2022-03-01 17:56:22,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=193, Invalid=1066, Unknown=1, NotChecked=0, Total=1260 [2022-03-01 17:56:22,712 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 146 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:22,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 415 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1028 Invalid, 0 Unknown, 118 Unchecked, 0.4s Time] [2022-03-01 17:56:22,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6395 states. [2022-03-01 17:56:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6395 to 6011. [2022-03-01 17:56:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6011 states, 6010 states have (on average 4.377870216306157) internal successors, (26311), 6010 states have internal predecessors, (26311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6011 states to 6011 states and 26311 transitions. [2022-03-01 17:56:22,811 INFO L78 Accepts]: Start accepts. Automaton has 6011 states and 26311 transitions. Word has length 23 [2022-03-01 17:56:22,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:22,811 INFO L470 AbstractCegarLoop]: Abstraction has 6011 states and 26311 transitions. [2022-03-01 17:56:22,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:22,811 INFO L276 IsEmpty]: Start isEmpty. Operand 6011 states and 26311 transitions. [2022-03-01 17:56:22,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:22,822 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:22,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:22,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:23,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:23,022 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:23,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:23,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1045012656, now seen corresponding path program 150 times [2022-03-01 17:56:23,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:23,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567874726] [2022-03-01 17:56:23,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:23,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:23,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:23,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567874726] [2022-03-01 17:56:23,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567874726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:23,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682623639] [2022-03-01 17:56:23,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:23,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:23,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:23,173 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:23,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-03-01 17:56:23,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:56:23,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:23,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:23,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:23,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:23,344 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 22 treesize of output 38 [2022-03-01 17:56:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:23,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:23,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:23,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:23,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:23,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:23,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682623639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:23,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:23,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:56:23,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715752653] [2022-03-01 17:56:23,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:23,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:56:23,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:23,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:56:23,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:56:23,886 INFO L87 Difference]: Start difference. First operand 6011 states and 26311 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:24,602 INFO L93 Difference]: Finished difference Result 6373 states and 27687 transitions. [2022-03-01 17:56:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:56:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:24,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:24,618 INFO L225 Difference]: With dead ends: 6373 [2022-03-01 17:56:24,619 INFO L226 Difference]: Without dead ends: 6339 [2022-03-01 17:56:24,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:56:24,619 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 91 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:24,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 485 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1225 Invalid, 0 Unknown, 160 Unchecked, 0.5s Time] [2022-03-01 17:56:24,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6339 states. [2022-03-01 17:56:24,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6339 to 6008. [2022-03-01 17:56:24,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6008 states, 6007 states have (on average 4.378724821042118) internal successors, (26303), 6007 states have internal predecessors, (26303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6008 states to 6008 states and 26303 transitions. [2022-03-01 17:56:24,722 INFO L78 Accepts]: Start accepts. Automaton has 6008 states and 26303 transitions. Word has length 23 [2022-03-01 17:56:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:24,722 INFO L470 AbstractCegarLoop]: Abstraction has 6008 states and 26303 transitions. [2022-03-01 17:56:24,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 6008 states and 26303 transitions. [2022-03-01 17:56:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:24,733 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:24,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:24,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-03-01 17:56:24,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-03-01 17:56:24,933 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:24,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:24,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1230066938, now seen corresponding path program 151 times [2022-03-01 17:56:24,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:24,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219160489] [2022-03-01 17:56:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:24,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:25,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:25,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219160489] [2022-03-01 17:56:25,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219160489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:25,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978442657] [2022-03-01 17:56:25,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:25,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:25,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:25,095 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:25,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-03-01 17:56:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:25,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:25,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:25,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:25,241 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 25 treesize of output 41 [2022-03-01 17:56:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:25,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:25,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:25,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:25,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:25,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:25,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978442657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:25,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:25,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:56:25,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899728506] [2022-03-01 17:56:25,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:25,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:56:25,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:25,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:56:25,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:56:25,890 INFO L87 Difference]: Start difference. First operand 6008 states and 26303 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:26,679 INFO L93 Difference]: Finished difference Result 6419 states and 27871 transitions. [2022-03-01 17:56:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:56:26,679 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:26,697 INFO L225 Difference]: With dead ends: 6419 [2022-03-01 17:56:26,697 INFO L226 Difference]: Without dead ends: 6393 [2022-03-01 17:56:26,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:56:26,697 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 141 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:26,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 393 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 974 Invalid, 0 Unknown, 166 Unchecked, 0.4s Time] [2022-03-01 17:56:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6393 states. [2022-03-01 17:56:26,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6393 to 6017. [2022-03-01 17:56:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6017 states, 6016 states have (on average 4.37749335106383) internal successors, (26335), 6016 states have internal predecessors, (26335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6017 states to 6017 states and 26335 transitions. [2022-03-01 17:56:26,812 INFO L78 Accepts]: Start accepts. Automaton has 6017 states and 26335 transitions. Word has length 23 [2022-03-01 17:56:26,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:26,812 INFO L470 AbstractCegarLoop]: Abstraction has 6017 states and 26335 transitions. [2022-03-01 17:56:26,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:26,812 INFO L276 IsEmpty]: Start isEmpty. Operand 6017 states and 26335 transitions. [2022-03-01 17:56:26,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:26,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:26,823 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:26,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-03-01 17:56:27,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:27,024 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:27,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:27,024 INFO L85 PathProgramCache]: Analyzing trace with hash 2023324290, now seen corresponding path program 152 times [2022-03-01 17:56:27,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:27,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604583218] [2022-03-01 17:56:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:27,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:27,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:27,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604583218] [2022-03-01 17:56:27,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604583218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:27,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950733578] [2022-03-01 17:56:27,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:27,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:27,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:27,184 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:27,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-03-01 17:56:27,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:27,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:27,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:27,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:27,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:27,329 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 21 treesize of output 37 [2022-03-01 17:56:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:29,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:29,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:29,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:29,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:29,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:29,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950733578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:29,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:29,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:56:29,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862128646] [2022-03-01 17:56:29,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:29,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:56:29,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:29,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:56:29,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:56:29,616 INFO L87 Difference]: Start difference. First operand 6017 states and 26335 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:30,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:30,186 INFO L93 Difference]: Finished difference Result 6263 states and 27263 transitions. [2022-03-01 17:56:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:56:30,186 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:30,204 INFO L225 Difference]: With dead ends: 6263 [2022-03-01 17:56:30,204 INFO L226 Difference]: Without dead ends: 6235 [2022-03-01 17:56:30,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:56:30,205 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 131 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:30,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 332 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 852 Invalid, 0 Unknown, 100 Unchecked, 0.4s Time] [2022-03-01 17:56:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6235 states. [2022-03-01 17:56:30,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6235 to 6010. [2022-03-01 17:56:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 6009 states have (on average 4.378598768513895) internal successors, (26311), 6009 states have internal predecessors, (26311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:30,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 26311 transitions. [2022-03-01 17:56:30,311 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 26311 transitions. Word has length 23 [2022-03-01 17:56:30,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:30,311 INFO L470 AbstractCegarLoop]: Abstraction has 6010 states and 26311 transitions. [2022-03-01 17:56:30,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:30,311 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 26311 transitions. [2022-03-01 17:56:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:30,322 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:30,322 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:30,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:30,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-03-01 17:56:30,522 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:30,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:30,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1736202938, now seen corresponding path program 153 times [2022-03-01 17:56:30,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:30,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181165118] [2022-03-01 17:56:30,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:30,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:30,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:30,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181165118] [2022-03-01 17:56:30,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181165118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:30,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50407985] [2022-03-01 17:56:30,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:30,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:30,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:30,659 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:30,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-03-01 17:56:30,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:56:30,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:30,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:30,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:30,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:30,802 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 25 treesize of output 41 [2022-03-01 17:56:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:31,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:31,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:31,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:31,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:31,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:31,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50407985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:31,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:31,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:56:31,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938879440] [2022-03-01 17:56:31,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:31,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:56:31,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:31,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:56:31,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:56:31,411 INFO L87 Difference]: Start difference. First operand 6010 states and 26311 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:31,946 INFO L93 Difference]: Finished difference Result 6260 states and 27238 transitions. [2022-03-01 17:56:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:56:31,946 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:31,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:31,963 INFO L225 Difference]: With dead ends: 6260 [2022-03-01 17:56:31,963 INFO L226 Difference]: Without dead ends: 6234 [2022-03-01 17:56:31,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:56:31,963 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 119 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:31,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 339 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 804 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-03-01 17:56:31,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6234 states. [2022-03-01 17:56:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6234 to 6010. [2022-03-01 17:56:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 6009 states have (on average 4.378598768513895) internal successors, (26311), 6009 states have internal predecessors, (26311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:32,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 26311 transitions. [2022-03-01 17:56:32,103 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 26311 transitions. Word has length 23 [2022-03-01 17:56:32,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:32,103 INFO L470 AbstractCegarLoop]: Abstraction has 6010 states and 26311 transitions. [2022-03-01 17:56:32,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:32,103 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 26311 transitions. [2022-03-01 17:56:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:32,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:32,115 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:32,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-03-01 17:56:32,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-03-01 17:56:32,315 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:32,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:32,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1242985552, now seen corresponding path program 154 times [2022-03-01 17:56:32,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:32,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452045908] [2022-03-01 17:56:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:32,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:32,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:32,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452045908] [2022-03-01 17:56:32,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452045908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:32,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927446314] [2022-03-01 17:56:32,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:32,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:32,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:32,455 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:32,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-03-01 17:56:32,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:32,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:32,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:32,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:32,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:32,597 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 21 treesize of output 37 [2022-03-01 17:56:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:33,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:33,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:33,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:33,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:33,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:33,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927446314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:33,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:33,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:56:33,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535385119] [2022-03-01 17:56:33,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:33,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:56:33,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:33,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:56:33,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:56:33,250 INFO L87 Difference]: Start difference. First operand 6010 states and 26311 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:33,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:33,920 INFO L93 Difference]: Finished difference Result 6336 states and 27551 transitions. [2022-03-01 17:56:33,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:56:33,920 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:33,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:33,937 INFO L225 Difference]: With dead ends: 6336 [2022-03-01 17:56:33,937 INFO L226 Difference]: Without dead ends: 6315 [2022-03-01 17:56:33,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:56:33,937 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 116 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:33,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 370 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1005 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-03-01 17:56:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6315 states. [2022-03-01 17:56:34,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6315 to 6010. [2022-03-01 17:56:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 6009 states have (on average 4.378598768513895) internal successors, (26311), 6009 states have internal predecessors, (26311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:34,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 26311 transitions. [2022-03-01 17:56:34,084 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 26311 transitions. Word has length 23 [2022-03-01 17:56:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:34,084 INFO L470 AbstractCegarLoop]: Abstraction has 6010 states and 26311 transitions. [2022-03-01 17:56:34,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 26311 transitions. [2022-03-01 17:56:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:34,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:34,094 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:34,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:34,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-03-01 17:56:34,295 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:34,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:34,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2117205488, now seen corresponding path program 155 times [2022-03-01 17:56:34,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:34,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314980265] [2022-03-01 17:56:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:34,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:34,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:34,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314980265] [2022-03-01 17:56:34,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314980265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:34,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761916662] [2022-03-01 17:56:34,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:34,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:34,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:34,440 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:34,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-03-01 17:56:34,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:56:34,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:34,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:34,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:34,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:34,594 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 21 treesize of output 37 [2022-03-01 17:56:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:35,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:35,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:35,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:35,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:35,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:35,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761916662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:35,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:35,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:56:35,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271632156] [2022-03-01 17:56:35,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:35,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:56:35,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:35,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:56:35,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:56:35,250 INFO L87 Difference]: Start difference. First operand 6010 states and 26311 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:36,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:36,089 INFO L93 Difference]: Finished difference Result 6368 states and 27676 transitions. [2022-03-01 17:56:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:56:36,089 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:36,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:36,104 INFO L225 Difference]: With dead ends: 6368 [2022-03-01 17:56:36,105 INFO L226 Difference]: Without dead ends: 6343 [2022-03-01 17:56:36,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:56:36,105 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 167 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:36,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 414 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1091 Invalid, 0 Unknown, 103 Unchecked, 0.5s Time] [2022-03-01 17:56:36,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6343 states. [2022-03-01 17:56:36,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6343 to 6012. [2022-03-01 17:56:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 4.378805523207453) internal successors, (26321), 6011 states have internal predecessors, (26321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 26321 transitions. [2022-03-01 17:56:36,245 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 26321 transitions. Word has length 23 [2022-03-01 17:56:36,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:36,245 INFO L470 AbstractCegarLoop]: Abstraction has 6012 states and 26321 transitions. [2022-03-01 17:56:36,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:36,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 26321 transitions. [2022-03-01 17:56:36,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:36,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:36,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:36,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:36,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:36,456 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:36,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1165069276, now seen corresponding path program 156 times [2022-03-01 17:56:36,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:36,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765609290] [2022-03-01 17:56:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:36,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:36,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:36,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765609290] [2022-03-01 17:56:36,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765609290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:36,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053324673] [2022-03-01 17:56:36,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:36,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:36,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:36,601 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:36,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-03-01 17:56:36,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:56:36,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:36,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:36,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:36,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:36,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-03-01 17:56:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:37,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:37,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:37,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:37,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:37,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:37,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053324673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:37,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:37,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:56:37,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635876289] [2022-03-01 17:56:37,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:37,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:56:37,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:56:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:56:37,417 INFO L87 Difference]: Start difference. First operand 6012 states and 26321 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:38,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:38,334 INFO L93 Difference]: Finished difference Result 6386 states and 27747 transitions. [2022-03-01 17:56:38,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:56:38,335 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:38,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:38,352 INFO L225 Difference]: With dead ends: 6386 [2022-03-01 17:56:38,352 INFO L226 Difference]: Without dead ends: 6365 [2022-03-01 17:56:38,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:56:38,352 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 149 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:38,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 470 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1238 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2022-03-01 17:56:38,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6365 states. [2022-03-01 17:56:38,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6365 to 6008. [2022-03-01 17:56:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6008 states, 6007 states have (on average 4.378724821042118) internal successors, (26303), 6007 states have internal predecessors, (26303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6008 states to 6008 states and 26303 transitions. [2022-03-01 17:56:38,509 INFO L78 Accepts]: Start accepts. Automaton has 6008 states and 26303 transitions. Word has length 23 [2022-03-01 17:56:38,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:38,509 INFO L470 AbstractCegarLoop]: Abstraction has 6008 states and 26303 transitions. [2022-03-01 17:56:38,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand 6008 states and 26303 transitions. [2022-03-01 17:56:38,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:38,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:38,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:38,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:38,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:38,720 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:38,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:38,721 INFO L85 PathProgramCache]: Analyzing trace with hash -552416894, now seen corresponding path program 157 times [2022-03-01 17:56:38,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:38,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513881655] [2022-03-01 17:56:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:38,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:38,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:38,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513881655] [2022-03-01 17:56:38,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513881655] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:38,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227181197] [2022-03-01 17:56:38,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:38,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:38,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:38,854 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:38,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-03-01 17:56:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:38,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:38,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:39,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:39,037 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 22 treesize of output 38 [2022-03-01 17:56:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:39,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:39,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:39,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:39,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:39,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:39,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227181197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:39,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:39,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:56:39,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381123627] [2022-03-01 17:56:39,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:39,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:56:39,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:56:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:56:39,602 INFO L87 Difference]: Start difference. First operand 6008 states and 26303 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:40,563 INFO L93 Difference]: Finished difference Result 6548 states and 28371 transitions. [2022-03-01 17:56:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:56:40,563 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:40,580 INFO L225 Difference]: With dead ends: 6548 [2022-03-01 17:56:40,580 INFO L226 Difference]: Without dead ends: 6517 [2022-03-01 17:56:40,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:56:40,581 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 190 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:40,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 563 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1404 Invalid, 0 Unknown, 129 Unchecked, 0.6s Time] [2022-03-01 17:56:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6517 states. [2022-03-01 17:56:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6517 to 6010. [2022-03-01 17:56:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 6009 states have (on average 4.378265934431686) internal successors, (26309), 6009 states have internal predecessors, (26309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:40,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 26309 transitions. [2022-03-01 17:56:40,739 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 26309 transitions. Word has length 23 [2022-03-01 17:56:40,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:40,739 INFO L470 AbstractCegarLoop]: Abstraction has 6010 states and 26309 transitions. [2022-03-01 17:56:40,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 26309 transitions. [2022-03-01 17:56:40,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:40,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:40,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:40,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-03-01 17:56:40,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:40,950 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:40,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:40,951 INFO L85 PathProgramCache]: Analyzing trace with hash 487818904, now seen corresponding path program 158 times [2022-03-01 17:56:40,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:40,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404324723] [2022-03-01 17:56:40,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:40,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:41,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:41,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404324723] [2022-03-01 17:56:41,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404324723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:41,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677411338] [2022-03-01 17:56:41,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:41,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:41,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:41,082 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:41,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-03-01 17:56:41,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:41,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:41,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:41,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:41,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:41,238 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 21 treesize of output 37 [2022-03-01 17:56:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:41,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:41,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:41,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:41,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:41,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:41,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677411338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:41,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:41,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:56:41,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561077686] [2022-03-01 17:56:41,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:41,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:56:41,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:41,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:56:41,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:56:41,824 INFO L87 Difference]: Start difference. First operand 6010 states and 26309 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:42,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:42,701 INFO L93 Difference]: Finished difference Result 6401 states and 27794 transitions. [2022-03-01 17:56:42,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:56:42,702 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:42,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:42,719 INFO L225 Difference]: With dead ends: 6401 [2022-03-01 17:56:42,719 INFO L226 Difference]: Without dead ends: 6376 [2022-03-01 17:56:42,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:56:42,720 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 180 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:42,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 447 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1020 Invalid, 0 Unknown, 102 Unchecked, 0.4s Time] [2022-03-01 17:56:42,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6376 states. [2022-03-01 17:56:42,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6376 to 6012. [2022-03-01 17:56:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 4.378472799866911) internal successors, (26319), 6011 states have internal predecessors, (26319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 26319 transitions. [2022-03-01 17:56:42,866 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 26319 transitions. Word has length 23 [2022-03-01 17:56:42,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:42,866 INFO L470 AbstractCegarLoop]: Abstraction has 6012 states and 26319 transitions. [2022-03-01 17:56:42,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 26319 transitions. [2022-03-01 17:56:42,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:42,877 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:42,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:42,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:43,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:43,091 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:43,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:43,092 INFO L85 PathProgramCache]: Analyzing trace with hash -524873628, now seen corresponding path program 159 times [2022-03-01 17:56:43,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:43,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376134164] [2022-03-01 17:56:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:43,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:43,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:43,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376134164] [2022-03-01 17:56:43,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376134164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:43,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344884613] [2022-03-01 17:56:43,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:43,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:43,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:43,233 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:43,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-03-01 17:56:43,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:56:43,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:43,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:43,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:43,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:43,394 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 21 treesize of output 37 [2022-03-01 17:56:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:43,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:44,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:44,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:44,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:44,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:44,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344884613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:44,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:44,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:56:44,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224492039] [2022-03-01 17:56:44,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:44,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:56:44,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:44,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:56:44,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:56:44,071 INFO L87 Difference]: Start difference. First operand 6012 states and 26319 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:45,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:45,188 INFO L93 Difference]: Finished difference Result 6499 states and 28182 transitions. [2022-03-01 17:56:45,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:56:45,189 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:45,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:45,205 INFO L225 Difference]: With dead ends: 6499 [2022-03-01 17:56:45,205 INFO L226 Difference]: Without dead ends: 6478 [2022-03-01 17:56:45,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=1385, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:56:45,206 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 188 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:45,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 604 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1583 Invalid, 0 Unknown, 67 Unchecked, 0.6s Time] [2022-03-01 17:56:45,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6478 states. [2022-03-01 17:56:45,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6478 to 6006. [2022-03-01 17:56:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6006 states, 6005 states have (on average 4.378184845961699) internal successors, (26291), 6005 states have internal predecessors, (26291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6006 states to 6006 states and 26291 transitions. [2022-03-01 17:56:45,306 INFO L78 Accepts]: Start accepts. Automaton has 6006 states and 26291 transitions. Word has length 23 [2022-03-01 17:56:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:45,306 INFO L470 AbstractCegarLoop]: Abstraction has 6006 states and 26291 transitions. [2022-03-01 17:56:45,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:45,306 INFO L276 IsEmpty]: Start isEmpty. Operand 6006 states and 26291 transitions. [2022-03-01 17:56:45,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:45,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:45,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:45,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-03-01 17:56:45,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:45,517 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:45,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1624571748, now seen corresponding path program 160 times [2022-03-01 17:56:45,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:45,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437890560] [2022-03-01 17:56:45,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:45,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:45,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:45,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437890560] [2022-03-01 17:56:45,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437890560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:45,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245690016] [2022-03-01 17:56:45,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:45,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:45,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:45,654 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:45,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-03-01 17:56:45,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:45,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:45,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:45,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:45,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:45,842 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 22 treesize of output 38 [2022-03-01 17:56:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:46,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:46,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:46,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:46,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:46,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:46,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245690016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:46,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:46,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:56:46,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382598063] [2022-03-01 17:56:46,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:46,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:56:46,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:46,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:56:46,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:56:46,374 INFO L87 Difference]: Start difference. First operand 6006 states and 26291 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:47,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:47,231 INFO L93 Difference]: Finished difference Result 6239 states and 27173 transitions. [2022-03-01 17:56:47,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:56:47,232 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:47,248 INFO L225 Difference]: With dead ends: 6239 [2022-03-01 17:56:47,248 INFO L226 Difference]: Without dead ends: 6217 [2022-03-01 17:56:47,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:56:47,248 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 117 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:47,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 525 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1304 Invalid, 0 Unknown, 135 Unchecked, 0.5s Time] [2022-03-01 17:56:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6217 states. [2022-03-01 17:56:47,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6217 to 6004. [2022-03-01 17:56:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6004 states, 6003 states have (on average 4.377811094452774) internal successors, (26280), 6003 states have internal predecessors, (26280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:47,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6004 states to 6004 states and 26280 transitions. [2022-03-01 17:56:47,344 INFO L78 Accepts]: Start accepts. Automaton has 6004 states and 26280 transitions. Word has length 23 [2022-03-01 17:56:47,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:47,344 INFO L470 AbstractCegarLoop]: Abstraction has 6004 states and 26280 transitions. [2022-03-01 17:56:47,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:47,345 INFO L276 IsEmpty]: Start isEmpty. Operand 6004 states and 26280 transitions. [2022-03-01 17:56:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:47,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:47,355 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:47,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-03-01 17:56:47,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2022-03-01 17:56:47,555 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1027383068, now seen corresponding path program 161 times [2022-03-01 17:56:47,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:47,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718166017] [2022-03-01 17:56:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:47,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:47,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:47,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718166017] [2022-03-01 17:56:47,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718166017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:47,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096100295] [2022-03-01 17:56:47,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:47,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:47,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:47,721 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:47,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-03-01 17:56:47,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:56:47,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:47,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:56:47,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:47,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:47,871 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 29 treesize of output 45 [2022-03-01 17:56:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:48,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:48,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:48,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:48,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:48,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:48,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096100295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:48,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:48,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:56:48,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602288028] [2022-03-01 17:56:48,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:48,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:56:48,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:48,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:56:48,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:56:48,252 INFO L87 Difference]: Start difference. First operand 6004 states and 26280 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:49,153 INFO L93 Difference]: Finished difference Result 6290 states and 27371 transitions. [2022-03-01 17:56:49,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:56:49,153 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:49,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:49,168 INFO L225 Difference]: With dead ends: 6290 [2022-03-01 17:56:49,168 INFO L226 Difference]: Without dead ends: 6264 [2022-03-01 17:56:49,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:56:49,169 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 122 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:49,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 293 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:56:49,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6264 states. [2022-03-01 17:56:49,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6264 to 6011. [2022-03-01 17:56:49,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6011 states, 6010 states have (on average 4.376705490848586) internal successors, (26304), 6010 states have internal predecessors, (26304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6011 states to 6011 states and 26304 transitions. [2022-03-01 17:56:49,262 INFO L78 Accepts]: Start accepts. Automaton has 6011 states and 26304 transitions. Word has length 23 [2022-03-01 17:56:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:49,263 INFO L470 AbstractCegarLoop]: Abstraction has 6011 states and 26304 transitions. [2022-03-01 17:56:49,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 6011 states and 26304 transitions. [2022-03-01 17:56:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:49,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:49,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:49,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:49,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-03-01 17:56:49,473 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:49,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:49,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2068959136, now seen corresponding path program 162 times [2022-03-01 17:56:49,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:49,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168023125] [2022-03-01 17:56:49,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:49,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:49,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:49,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168023125] [2022-03-01 17:56:49,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168023125] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:49,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601318327] [2022-03-01 17:56:49,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:49,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:49,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:49,609 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:49,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-03-01 17:56:49,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:56:49,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:49,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:49,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:49,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:49,754 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 21 treesize of output 37 [2022-03-01 17:56:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:50,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:50,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:50,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:50,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:50,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:50,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601318327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:50,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:50,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:56:50,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880304435] [2022-03-01 17:56:50,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:50,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:56:50,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:50,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:56:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:56:50,651 INFO L87 Difference]: Start difference. First operand 6011 states and 26304 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:51,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:51,656 INFO L93 Difference]: Finished difference Result 6356 states and 27635 transitions. [2022-03-01 17:56:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:56:51,657 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:51,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:51,674 INFO L225 Difference]: With dead ends: 6356 [2022-03-01 17:56:51,675 INFO L226 Difference]: Without dead ends: 6328 [2022-03-01 17:56:51,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=280, Invalid=1360, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:56:51,675 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:51,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 344 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 900 Invalid, 0 Unknown, 122 Unchecked, 0.4s Time] [2022-03-01 17:56:51,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6328 states. [2022-03-01 17:56:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6328 to 6004. [2022-03-01 17:56:51,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6004 states, 6003 states have (on average 4.377811094452774) internal successors, (26280), 6003 states have internal predecessors, (26280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6004 states to 6004 states and 26280 transitions. [2022-03-01 17:56:51,823 INFO L78 Accepts]: Start accepts. Automaton has 6004 states and 26280 transitions. Word has length 23 [2022-03-01 17:56:51,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:51,823 INFO L470 AbstractCegarLoop]: Abstraction has 6004 states and 26280 transitions. [2022-03-01 17:56:51,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:51,823 INFO L276 IsEmpty]: Start isEmpty. Operand 6004 states and 26280 transitions. [2022-03-01 17:56:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:51,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:51,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:51,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-03-01 17:56:52,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-03-01 17:56:52,034 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:52,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:52,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1914521618, now seen corresponding path program 163 times [2022-03-01 17:56:52,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:52,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100024062] [2022-03-01 17:56:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:52,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:52,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:52,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100024062] [2022-03-01 17:56:52,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100024062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:52,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302320694] [2022-03-01 17:56:52,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:52,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:52,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:52,179 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:52,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-03-01 17:56:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:52,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:52,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:52,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:52,327 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 21 treesize of output 37 [2022-03-01 17:56:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:52,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:52,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:52,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:52,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:52,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302320694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:52,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:52,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:56:52,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332442397] [2022-03-01 17:56:52,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:52,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:56:52,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:52,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:56:52,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:56:52,993 INFO L87 Difference]: Start difference. First operand 6004 states and 26280 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:54,026 INFO L93 Difference]: Finished difference Result 6338 states and 27561 transitions. [2022-03-01 17:56:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:56:54,026 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:54,044 INFO L225 Difference]: With dead ends: 6338 [2022-03-01 17:56:54,044 INFO L226 Difference]: Without dead ends: 6313 [2022-03-01 17:56:54,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:56:54,045 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 196 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:54,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 380 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1025 Invalid, 0 Unknown, 96 Unchecked, 0.5s Time] [2022-03-01 17:56:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2022-03-01 17:56:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 6006. [2022-03-01 17:56:54,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6006 states, 6005 states have (on average 4.378018318068277) internal successors, (26290), 6005 states have internal predecessors, (26290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:54,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6006 states to 6006 states and 26290 transitions. [2022-03-01 17:56:54,159 INFO L78 Accepts]: Start accepts. Automaton has 6006 states and 26290 transitions. Word has length 23 [2022-03-01 17:56:54,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:54,159 INFO L470 AbstractCegarLoop]: Abstraction has 6006 states and 26290 transitions. [2022-03-01 17:56:54,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 6006 states and 26290 transitions. [2022-03-01 17:56:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:54,171 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:54,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:54,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:54,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-03-01 17:56:54,372 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:54,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:54,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1367753146, now seen corresponding path program 164 times [2022-03-01 17:56:54,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:54,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569222300] [2022-03-01 17:56:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:54,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:54,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:54,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569222300] [2022-03-01 17:56:54,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569222300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:54,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424330576] [2022-03-01 17:56:54,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:54,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:54,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:54,526 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:54,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-03-01 17:56:54,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:54,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:54,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:54,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:54,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:54,698 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 25 treesize of output 41 [2022-03-01 17:56:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:55,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:55,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:55,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:56:55,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:55,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:56:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:55,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424330576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:55,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:55,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:56:55,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243504019] [2022-03-01 17:56:55,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:55,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:56:55,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:55,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:56:55,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:56:55,381 INFO L87 Difference]: Start difference. First operand 6006 states and 26290 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:55,919 INFO L93 Difference]: Finished difference Result 6181 states and 26933 transitions. [2022-03-01 17:56:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:56:55,919 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:55,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:55,936 INFO L225 Difference]: With dead ends: 6181 [2022-03-01 17:56:55,936 INFO L226 Difference]: Without dead ends: 6160 [2022-03-01 17:56:55,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:56:55,937 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 125 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:55,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 315 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 719 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2022-03-01 17:56:55,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2022-03-01 17:56:56,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 6000. [2022-03-01 17:56:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6000 states, 5999 states have (on average 4.377896316052675) internal successors, (26263), 5999 states have internal predecessors, (26263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:56,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6000 states to 6000 states and 26263 transitions. [2022-03-01 17:56:56,046 INFO L78 Accepts]: Start accepts. Automaton has 6000 states and 26263 transitions. Word has length 23 [2022-03-01 17:56:56,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:56,046 INFO L470 AbstractCegarLoop]: Abstraction has 6000 states and 26263 transitions. [2022-03-01 17:56:56,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 6000 states and 26263 transitions. [2022-03-01 17:56:56,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:56,057 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:56,057 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:56,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-03-01 17:56:56,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-03-01 17:56:56,258 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:56,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:56,258 INFO L85 PathProgramCache]: Analyzing trace with hash 351638040, now seen corresponding path program 165 times [2022-03-01 17:56:56,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:56,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884528545] [2022-03-01 17:56:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:56,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:56,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:56,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884528545] [2022-03-01 17:56:56,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884528545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:56,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709065511] [2022-03-01 17:56:56,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:56,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:56,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:56,378 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:56,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-03-01 17:56:56,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:56:56,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:56,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:56:56,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:56,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:56,604 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:56:56,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2022-03-01 17:56:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:56,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:56,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709065511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:56,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:56,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:56:56,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012388996] [2022-03-01 17:56:56,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:56,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:56:56,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:56:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:56:56,904 INFO L87 Difference]: Start difference. First operand 6000 states and 26263 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:58,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:58,964 INFO L93 Difference]: Finished difference Result 7821 states and 33463 transitions. [2022-03-01 17:56:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-01 17:56:58,964 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:56:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:58,985 INFO L225 Difference]: With dead ends: 7821 [2022-03-01 17:56:58,986 INFO L226 Difference]: Without dead ends: 7775 [2022-03-01 17:56:58,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=588, Invalid=3968, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 17:56:58,986 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 467 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:58,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 675 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:56:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7775 states. [2022-03-01 17:56:59,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7775 to 6046. [2022-03-01 17:56:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6046 states, 6045 states have (on average 4.379321753515302) internal successors, (26473), 6045 states have internal predecessors, (26473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6046 states to 6046 states and 26473 transitions. [2022-03-01 17:56:59,109 INFO L78 Accepts]: Start accepts. Automaton has 6046 states and 26473 transitions. Word has length 23 [2022-03-01 17:56:59,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:59,109 INFO L470 AbstractCegarLoop]: Abstraction has 6046 states and 26473 transitions. [2022-03-01 17:56:59,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:59,110 INFO L276 IsEmpty]: Start isEmpty. Operand 6046 states and 26473 transitions. [2022-03-01 17:56:59,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:56:59,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:59,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:59,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-03-01 17:56:59,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:59,321 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:56:59,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:59,322 INFO L85 PathProgramCache]: Analyzing trace with hash 936971992, now seen corresponding path program 166 times [2022-03-01 17:56:59,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:59,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359369885] [2022-03-01 17:56:59,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:59,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:59,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:59,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359369885] [2022-03-01 17:56:59,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359369885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:59,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974424405] [2022-03-01 17:56:59,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:59,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:59,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:59,445 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:59,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-03-01 17:56:59,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:59,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:59,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:56:59,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:59,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:59,612 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 21 treesize of output 37 [2022-03-01 17:56:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:59,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:00,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:00,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:00,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:00,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:00,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974424405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:00,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:00,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:57:00,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689317341] [2022-03-01 17:57:00,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:00,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:57:00,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:00,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:57:00,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:57:00,151 INFO L87 Difference]: Start difference. First operand 6046 states and 26473 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:01,031 INFO L93 Difference]: Finished difference Result 6320 states and 27498 transitions. [2022-03-01 17:57:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:57:01,031 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:01,049 INFO L225 Difference]: With dead ends: 6320 [2022-03-01 17:57:01,049 INFO L226 Difference]: Without dead ends: 6294 [2022-03-01 17:57:01,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=1180, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:57:01,049 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 131 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:01,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 444 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 979 Invalid, 0 Unknown, 64 Unchecked, 0.4s Time] [2022-03-01 17:57:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2022-03-01 17:57:01,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 6050. [2022-03-01 17:57:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6050 states, 6049 states have (on average 4.379070920813358) internal successors, (26489), 6049 states have internal predecessors, (26489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6050 states to 6050 states and 26489 transitions. [2022-03-01 17:57:01,160 INFO L78 Accepts]: Start accepts. Automaton has 6050 states and 26489 transitions. Word has length 23 [2022-03-01 17:57:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:01,161 INFO L470 AbstractCegarLoop]: Abstraction has 6050 states and 26489 transitions. [2022-03-01 17:57:01,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:01,161 INFO L276 IsEmpty]: Start isEmpty. Operand 6050 states and 26489 transitions. [2022-03-01 17:57:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:01,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:01,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:01,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-03-01 17:57:01,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2022-03-01 17:57:01,372 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:01,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:01,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1183867346, now seen corresponding path program 167 times [2022-03-01 17:57:01,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:01,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293995219] [2022-03-01 17:57:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:01,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:01,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:01,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293995219] [2022-03-01 17:57:01,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293995219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:01,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532576014] [2022-03-01 17:57:01,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:57:01,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:01,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:01,493 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:01,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-03-01 17:57:01,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:57:01,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:01,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:01,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:01,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:01,686 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 22 treesize of output 38 [2022-03-01 17:57:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:02,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:02,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:02,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:02,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:02,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:02,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532576014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:02,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:02,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:57:02,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038488745] [2022-03-01 17:57:02,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:02,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:57:02,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:02,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:57:02,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:57:02,200 INFO L87 Difference]: Start difference. First operand 6050 states and 26489 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:02,864 INFO L93 Difference]: Finished difference Result 6274 states and 27336 transitions. [2022-03-01 17:57:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:57:02,865 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:02,882 INFO L225 Difference]: With dead ends: 6274 [2022-03-01 17:57:02,882 INFO L226 Difference]: Without dead ends: 6251 [2022-03-01 17:57:02,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:57:02,883 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 101 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:02,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 406 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 952 Invalid, 0 Unknown, 106 Unchecked, 0.4s Time] [2022-03-01 17:57:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2022-03-01 17:57:02,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 6050. [2022-03-01 17:57:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6050 states, 6049 states have (on average 4.379070920813358) internal successors, (26489), 6049 states have internal predecessors, (26489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6050 states to 6050 states and 26489 transitions. [2022-03-01 17:57:02,994 INFO L78 Accepts]: Start accepts. Automaton has 6050 states and 26489 transitions. Word has length 23 [2022-03-01 17:57:02,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:02,994 INFO L470 AbstractCegarLoop]: Abstraction has 6050 states and 26489 transitions. [2022-03-01 17:57:02,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:02,995 INFO L276 IsEmpty]: Start isEmpty. Operand 6050 states and 26489 transitions. [2022-03-01 17:57:03,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:03,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:03,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:03,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:03,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-03-01 17:57:03,231 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:03,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:03,232 INFO L85 PathProgramCache]: Analyzing trace with hash -512050194, now seen corresponding path program 168 times [2022-03-01 17:57:03,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:03,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565494220] [2022-03-01 17:57:03,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:03,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:03,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:03,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565494220] [2022-03-01 17:57:03,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565494220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:03,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839782786] [2022-03-01 17:57:03,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:57:03,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:03,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:03,353 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:03,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-03-01 17:57:03,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:57:03,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:03,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 17:57:03,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:03,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:03,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:03,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:03,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 17:57:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:03,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:03,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839782786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:03,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:03,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-03-01 17:57:03,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177795105] [2022-03-01 17:57:03,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:03,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:57:03,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:03,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:57:03,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:57:03,901 INFO L87 Difference]: Start difference. First operand 6050 states and 26489 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:05,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:05,848 INFO L93 Difference]: Finished difference Result 8855 states and 37636 transitions. [2022-03-01 17:57:05,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 17:57:05,848 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 [2022-03-01 17:57:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:05,874 INFO L225 Difference]: With dead ends: 8855 [2022-03-01 17:57:05,875 INFO L226 Difference]: Without dead ends: 8807 [2022-03-01 17:57:05,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:57:05,875 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 302 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:05,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 637 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 17:57:05,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8807 states. [2022-03-01 17:57:05,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8807 to 6108. [2022-03-01 17:57:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6108 states, 6107 states have (on average 4.37874570165384) internal successors, (26741), 6107 states have internal predecessors, (26741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6108 states to 6108 states and 26741 transitions. [2022-03-01 17:57:06,015 INFO L78 Accepts]: Start accepts. Automaton has 6108 states and 26741 transitions. Word has length 23 [2022-03-01 17:57:06,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:06,015 INFO L470 AbstractCegarLoop]: Abstraction has 6108 states and 26741 transitions. [2022-03-01 17:57:06,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 6108 states and 26741 transitions. [2022-03-01 17:57:06,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:06,026 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:06,026 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:06,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:06,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:06,227 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:06,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:06,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1476658, now seen corresponding path program 169 times [2022-03-01 17:57:06,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:06,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145531137] [2022-03-01 17:57:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:06,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:06,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:06,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145531137] [2022-03-01 17:57:06,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145531137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:06,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730731062] [2022-03-01 17:57:06,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:57:06,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:06,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:06,374 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:06,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-03-01 17:57:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:06,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:06,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:06,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:06,558 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 25 treesize of output 41 [2022-03-01 17:57:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:06,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:07,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:07,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:07,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:07,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:07,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730731062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:07,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:07,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:57:07,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406389622] [2022-03-01 17:57:07,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:07,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:57:07,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:07,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:57:07,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:57:07,116 INFO L87 Difference]: Start difference. First operand 6108 states and 26741 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:08,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:08,127 INFO L93 Difference]: Finished difference Result 6485 states and 28188 transitions. [2022-03-01 17:57:08,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:57:08,128 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:57:08,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:08,145 INFO L225 Difference]: With dead ends: 6485 [2022-03-01 17:57:08,145 INFO L226 Difference]: Without dead ends: 6460 [2022-03-01 17:57:08,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:57:08,146 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:08,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 436 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1136 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2022-03-01 17:57:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6460 states. [2022-03-01 17:57:08,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6460 to 6118. [2022-03-01 17:57:08,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6118 states, 6117 states have (on average 4.378780447931993) internal successors, (26785), 6117 states have internal predecessors, (26785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6118 states to 6118 states and 26785 transitions. [2022-03-01 17:57:08,256 INFO L78 Accepts]: Start accepts. Automaton has 6118 states and 26785 transitions. Word has length 23 [2022-03-01 17:57:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:08,256 INFO L470 AbstractCegarLoop]: Abstraction has 6118 states and 26785 transitions. [2022-03-01 17:57:08,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 6118 states and 26785 transitions. [2022-03-01 17:57:08,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:08,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:08,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:08,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:08,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:08,469 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:08,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:08,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1077187814, now seen corresponding path program 170 times [2022-03-01 17:57:08,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:08,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651418023] [2022-03-01 17:57:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:08,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:08,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:08,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651418023] [2022-03-01 17:57:08,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651418023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:08,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764583066] [2022-03-01 17:57:08,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:57:08,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:08,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:08,607 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:08,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-03-01 17:57:08,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:08,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:08,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:08,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:08,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:08,780 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 25 treesize of output 41 [2022-03-01 17:57:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:09,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:09,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:09,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:09,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:09,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:09,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764583066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:09,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:09,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:57:09,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410499188] [2022-03-01 17:57:09,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:09,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:57:09,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:09,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:57:09,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:57:09,389 INFO L87 Difference]: Start difference. First operand 6118 states and 26785 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:10,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:10,279 INFO L93 Difference]: Finished difference Result 6478 states and 28159 transitions. [2022-03-01 17:57:10,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:57:10,280 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:57:10,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:10,298 INFO L225 Difference]: With dead ends: 6478 [2022-03-01 17:57:10,298 INFO L226 Difference]: Without dead ends: 6457 [2022-03-01 17:57:10,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:57:10,299 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 134 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:10,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 348 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 945 Invalid, 0 Unknown, 97 Unchecked, 0.4s Time] [2022-03-01 17:57:10,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6457 states. [2022-03-01 17:57:10,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6457 to 6116. [2022-03-01 17:57:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 6115 states have (on average 4.37857726901063) internal successors, (26775), 6115 states have internal predecessors, (26775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 26775 transitions. [2022-03-01 17:57:10,414 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 26775 transitions. Word has length 23 [2022-03-01 17:57:10,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:10,414 INFO L470 AbstractCegarLoop]: Abstraction has 6116 states and 26775 transitions. [2022-03-01 17:57:10,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 26775 transitions. [2022-03-01 17:57:10,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:10,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:10,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:10,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-03-01 17:57:10,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:10,626 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:10,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:10,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1248002746, now seen corresponding path program 171 times [2022-03-01 17:57:10,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:10,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534613864] [2022-03-01 17:57:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:10,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:10,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:10,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534613864] [2022-03-01 17:57:10,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534613864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:10,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731925103] [2022-03-01 17:57:10,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:10,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:10,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:10,749 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:10,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-03-01 17:57:10,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:57:10,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:10,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:57:10,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:10,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:10,982 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:57:10,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 57 [2022-03-01 17:57:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:11,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:11,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731925103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:11,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:11,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:57:11,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507896523] [2022-03-01 17:57:11,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:11,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:57:11,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:11,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:57:11,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:57:11,311 INFO L87 Difference]: Start difference. First operand 6116 states and 26775 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:13,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:13,545 INFO L93 Difference]: Finished difference Result 7383 states and 31695 transitions. [2022-03-01 17:57:13,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 17:57:13,545 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:13,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:13,566 INFO L225 Difference]: With dead ends: 7383 [2022-03-01 17:57:13,566 INFO L226 Difference]: Without dead ends: 7337 [2022-03-01 17:57:13,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=537, Invalid=4155, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 17:57:13,567 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 419 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:13,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 747 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1972 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 17:57:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7337 states. [2022-03-01 17:57:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7337 to 6136. [2022-03-01 17:57:13,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6136 states, 6135 states have (on average 4.378973105134475) internal successors, (26865), 6135 states have internal predecessors, (26865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:13,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 26865 transitions. [2022-03-01 17:57:13,689 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 26865 transitions. Word has length 23 [2022-03-01 17:57:13,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:13,690 INFO L470 AbstractCegarLoop]: Abstraction has 6136 states and 26865 transitions. [2022-03-01 17:57:13,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:13,690 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 26865 transitions. [2022-03-01 17:57:13,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:13,701 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:13,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:13,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:13,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:13,902 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:13,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:13,902 INFO L85 PathProgramCache]: Analyzing trace with hash 524761892, now seen corresponding path program 172 times [2022-03-01 17:57:13,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:13,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117763812] [2022-03-01 17:57:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:13,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:14,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:14,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117763812] [2022-03-01 17:57:14,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117763812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:14,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490219129] [2022-03-01 17:57:14,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:57:14,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:14,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:14,030 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:14,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-03-01 17:57:14,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:57:14,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:14,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:14,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:14,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:14,184 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 21 treesize of output 37 [2022-03-01 17:57:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:14,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:14,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:14,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:14,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:14,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:14,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490219129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:14,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:14,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:57:14,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075829561] [2022-03-01 17:57:14,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:14,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:57:14,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:14,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:57:14,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:57:14,722 INFO L87 Difference]: Start difference. First operand 6136 states and 26865 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:15,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:15,744 INFO L93 Difference]: Finished difference Result 6674 states and 28949 transitions. [2022-03-01 17:57:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:57:15,744 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:15,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:15,762 INFO L225 Difference]: With dead ends: 6674 [2022-03-01 17:57:15,762 INFO L226 Difference]: Without dead ends: 6649 [2022-03-01 17:57:15,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:57:15,763 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 244 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:15,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 476 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1021 Invalid, 0 Unknown, 225 Unchecked, 0.4s Time] [2022-03-01 17:57:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6649 states. [2022-03-01 17:57:15,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6649 to 6142. [2022-03-01 17:57:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6142 states, 6141 states have (on average 4.379254193128155) internal successors, (26893), 6141 states have internal predecessors, (26893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:15,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6142 states to 6142 states and 26893 transitions. [2022-03-01 17:57:15,917 INFO L78 Accepts]: Start accepts. Automaton has 6142 states and 26893 transitions. Word has length 23 [2022-03-01 17:57:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:15,917 INFO L470 AbstractCegarLoop]: Abstraction has 6142 states and 26893 transitions. [2022-03-01 17:57:15,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 6142 states and 26893 transitions. [2022-03-01 17:57:15,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:15,929 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:15,929 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:15,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-03-01 17:57:16,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-03-01 17:57:16,129 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:16,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:16,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1600473048, now seen corresponding path program 173 times [2022-03-01 17:57:16,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:16,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270202522] [2022-03-01 17:57:16,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:16,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:16,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:16,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270202522] [2022-03-01 17:57:16,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270202522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:16,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818157807] [2022-03-01 17:57:16,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:57:16,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:16,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:16,277 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:16,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-03-01 17:57:16,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:16,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:16,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:16,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:16,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:16,444 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 21 treesize of output 37 [2022-03-01 17:57:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:16,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:17,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:17,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:17,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:17,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:17,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818157807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:17,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:17,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:57:17,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071976869] [2022-03-01 17:57:17,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:17,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:57:17,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:17,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:57:17,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:57:17,079 INFO L87 Difference]: Start difference. First operand 6142 states and 26893 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:18,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:18,121 INFO L93 Difference]: Finished difference Result 6640 states and 28822 transitions. [2022-03-01 17:57:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:57:18,121 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:18,142 INFO L225 Difference]: With dead ends: 6640 [2022-03-01 17:57:18,142 INFO L226 Difference]: Without dead ends: 6619 [2022-03-01 17:57:18,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:57:18,142 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 196 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:18,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 492 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1163 Invalid, 0 Unknown, 183 Unchecked, 0.5s Time] [2022-03-01 17:57:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6619 states. [2022-03-01 17:57:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6619 to 6136. [2022-03-01 17:57:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6136 states, 6135 states have (on average 4.378973105134475) internal successors, (26865), 6135 states have internal predecessors, (26865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 26865 transitions. [2022-03-01 17:57:18,270 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 26865 transitions. Word has length 23 [2022-03-01 17:57:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:18,270 INFO L470 AbstractCegarLoop]: Abstraction has 6136 states and 26865 transitions. [2022-03-01 17:57:18,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:18,270 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 26865 transitions. [2022-03-01 17:57:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:18,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:18,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:18,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-03-01 17:57:18,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:18,483 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:18,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:18,483 INFO L85 PathProgramCache]: Analyzing trace with hash 420742538, now seen corresponding path program 174 times [2022-03-01 17:57:18,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:18,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772553051] [2022-03-01 17:57:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:18,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:18,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:18,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772553051] [2022-03-01 17:57:18,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772553051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:18,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911447240] [2022-03-01 17:57:18,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:57:18,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:18,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:18,619 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:18,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-03-01 17:57:18,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:57:18,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:18,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:18,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:18,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:18,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-03-01 17:57:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:19,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:19,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:19,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:19,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:19,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:19,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911447240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:19,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:19,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:57:19,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139574791] [2022-03-01 17:57:19,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:19,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:57:19,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:19,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:57:19,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:57:19,345 INFO L87 Difference]: Start difference. First operand 6136 states and 26865 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:20,177 INFO L93 Difference]: Finished difference Result 6904 states and 29850 transitions. [2022-03-01 17:57:20,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:57:20,177 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:20,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:20,196 INFO L225 Difference]: With dead ends: 6904 [2022-03-01 17:57:20,197 INFO L226 Difference]: Without dead ends: 6873 [2022-03-01 17:57:20,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:57:20,197 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 199 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:20,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 544 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1298 Invalid, 0 Unknown, 115 Unchecked, 0.5s Time] [2022-03-01 17:57:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6873 states. [2022-03-01 17:57:20,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6873 to 6136. [2022-03-01 17:57:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6136 states, 6135 states have (on average 4.377669111654442) internal successors, (26857), 6135 states have internal predecessors, (26857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 26857 transitions. [2022-03-01 17:57:20,312 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 26857 transitions. Word has length 23 [2022-03-01 17:57:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:20,312 INFO L470 AbstractCegarLoop]: Abstraction has 6136 states and 26857 transitions. [2022-03-01 17:57:20,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 26857 transitions. [2022-03-01 17:57:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:20,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:20,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:20,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:20,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-03-01 17:57:20,525 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:20,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:20,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1008487860, now seen corresponding path program 175 times [2022-03-01 17:57:20,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:20,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879580715] [2022-03-01 17:57:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:20,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:20,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:20,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879580715] [2022-03-01 17:57:20,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879580715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:20,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329654281] [2022-03-01 17:57:20,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:57:20,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:20,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:20,664 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:20,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-03-01 17:57:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:20,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:20,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:20,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:20,819 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 21 treesize of output 37 [2022-03-01 17:57:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:21,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:21,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:21,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:21,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:21,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:21,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329654281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:21,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:21,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:57:21,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137787658] [2022-03-01 17:57:21,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:21,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:57:21,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:21,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:57:21,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:57:21,354 INFO L87 Difference]: Start difference. First operand 6136 states and 26857 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:22,577 INFO L93 Difference]: Finished difference Result 6672 states and 28934 transitions. [2022-03-01 17:57:22,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:57:22,578 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:22,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:22,595 INFO L225 Difference]: With dead ends: 6672 [2022-03-01 17:57:22,595 INFO L226 Difference]: Without dead ends: 6647 [2022-03-01 17:57:22,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:57:22,595 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 193 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:22,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 641 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1555 Invalid, 0 Unknown, 224 Unchecked, 0.6s Time] [2022-03-01 17:57:22,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6647 states. [2022-03-01 17:57:22,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6647 to 6134. [2022-03-01 17:57:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6134 states, 6133 states have (on average 4.378118375998696) internal successors, (26851), 6133 states have internal predecessors, (26851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6134 states to 6134 states and 26851 transitions. [2022-03-01 17:57:22,700 INFO L78 Accepts]: Start accepts. Automaton has 6134 states and 26851 transitions. Word has length 23 [2022-03-01 17:57:22,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:22,700 INFO L470 AbstractCegarLoop]: Abstraction has 6134 states and 26851 transitions. [2022-03-01 17:57:22,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:22,700 INFO L276 IsEmpty]: Start isEmpty. Operand 6134 states and 26851 transitions. [2022-03-01 17:57:22,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:22,711 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:22,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:22,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-03-01 17:57:22,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:22,911 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:22,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:22,912 INFO L85 PathProgramCache]: Analyzing trace with hash -536016198, now seen corresponding path program 176 times [2022-03-01 17:57:22,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:22,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533113216] [2022-03-01 17:57:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:22,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:23,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:23,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533113216] [2022-03-01 17:57:23,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533113216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:23,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984289361] [2022-03-01 17:57:23,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:57:23,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:23,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:23,041 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:23,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-03-01 17:57:23,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:23,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:23,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:23,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:23,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:23,208 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 25 treesize of output 41 [2022-03-01 17:57:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:23,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:23,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:23,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:23,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:23,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:23,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984289361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:23,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:23,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:57:23,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197565448] [2022-03-01 17:57:23,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:23,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:57:23,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:23,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:57:23,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:57:23,760 INFO L87 Difference]: Start difference. First operand 6134 states and 26851 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:24,864 INFO L93 Difference]: Finished difference Result 6602 states and 28663 transitions. [2022-03-01 17:57:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:57:24,864 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:24,881 INFO L225 Difference]: With dead ends: 6602 [2022-03-01 17:57:24,881 INFO L226 Difference]: Without dead ends: 6577 [2022-03-01 17:57:24,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=1589, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:57:24,882 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 166 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:24,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 437 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1121 Invalid, 0 Unknown, 207 Unchecked, 0.5s Time] [2022-03-01 17:57:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6577 states. [2022-03-01 17:57:25,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6577 to 6140. [2022-03-01 17:57:25,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6140 states, 6139 states have (on average 4.37840039094315) internal successors, (26879), 6139 states have internal predecessors, (26879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6140 states to 6140 states and 26879 transitions. [2022-03-01 17:57:25,030 INFO L78 Accepts]: Start accepts. Automaton has 6140 states and 26879 transitions. Word has length 23 [2022-03-01 17:57:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:25,030 INFO L470 AbstractCegarLoop]: Abstraction has 6140 states and 26879 transitions. [2022-03-01 17:57:25,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand 6140 states and 26879 transitions. [2022-03-01 17:57:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:25,042 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:25,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:25,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-03-01 17:57:25,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:25,243 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:25,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:25,243 INFO L85 PathProgramCache]: Analyzing trace with hash 539694958, now seen corresponding path program 177 times [2022-03-01 17:57:25,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:25,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638017891] [2022-03-01 17:57:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:25,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:25,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:25,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638017891] [2022-03-01 17:57:25,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638017891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:25,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592705289] [2022-03-01 17:57:25,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:25,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:25,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:25,373 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:25,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-03-01 17:57:25,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:57:25,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:25,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:25,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:25,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:25,530 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 25 treesize of output 41 [2022-03-01 17:57:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:25,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:26,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:26,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:26,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:26,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:26,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592705289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:26,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:26,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:57:26,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847803037] [2022-03-01 17:57:26,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:26,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:57:26,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:26,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:57:26,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:57:26,087 INFO L87 Difference]: Start difference. First operand 6140 states and 26879 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:27,239 INFO L93 Difference]: Finished difference Result 6588 states and 28604 transitions. [2022-03-01 17:57:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:57:27,239 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:27,255 INFO L225 Difference]: With dead ends: 6588 [2022-03-01 17:57:27,255 INFO L226 Difference]: Without dead ends: 6567 [2022-03-01 17:57:27,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=257, Invalid=1302, Unknown=1, NotChecked=0, Total=1560 [2022-03-01 17:57:27,255 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 162 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:27,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 415 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1024 Invalid, 0 Unknown, 154 Unchecked, 0.4s Time] [2022-03-01 17:57:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6567 states. [2022-03-01 17:57:27,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6567 to 6130. [2022-03-01 17:57:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6130 states, 6129 states have (on average 4.37836514929026) internal successors, (26835), 6129 states have internal predecessors, (26835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:27,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6130 states to 6130 states and 26835 transitions. [2022-03-01 17:57:27,352 INFO L78 Accepts]: Start accepts. Automaton has 6130 states and 26835 transitions. Word has length 23 [2022-03-01 17:57:27,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:27,352 INFO L470 AbstractCegarLoop]: Abstraction has 6130 states and 26835 transitions. [2022-03-01 17:57:27,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:27,353 INFO L276 IsEmpty]: Start isEmpty. Operand 6130 states and 26835 transitions. [2022-03-01 17:57:27,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:27,387 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:27,387 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:27,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:27,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-03-01 17:57:27,587 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:27,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:27,588 INFO L85 PathProgramCache]: Analyzing trace with hash -111062674, now seen corresponding path program 178 times [2022-03-01 17:57:27,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:27,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915938245] [2022-03-01 17:57:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:27,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:27,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:27,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915938245] [2022-03-01 17:57:27,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915938245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:27,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046983215] [2022-03-01 17:57:27,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:57:27,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:27,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:27,708 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:27,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-03-01 17:57:27,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:57:27,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:27,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:27,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:27,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:27,874 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 20 treesize of output 36 [2022-03-01 17:57:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:28,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:28,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:28,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:28,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:28,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:28,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046983215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:28,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:28,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-03-01 17:57:28,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652810630] [2022-03-01 17:57:28,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:28,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:57:28,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:28,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:57:28,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:57:28,366 INFO L87 Difference]: Start difference. First operand 6130 states and 26835 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:30,105 INFO L93 Difference]: Finished difference Result 7800 states and 33395 transitions. [2022-03-01 17:57:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 17:57:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:30,124 INFO L225 Difference]: With dead ends: 7800 [2022-03-01 17:57:30,124 INFO L226 Difference]: Without dead ends: 7756 [2022-03-01 17:57:30,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=386, Invalid=2476, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:57:30,125 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 394 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:30,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 844 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1874 Invalid, 0 Unknown, 246 Unchecked, 0.8s Time] [2022-03-01 17:57:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7756 states. [2022-03-01 17:57:30,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7756 to 6150. [2022-03-01 17:57:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6150 states, 6149 states have (on average 4.3789234021792165) internal successors, (26926), 6149 states have internal predecessors, (26926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6150 states to 6150 states and 26926 transitions. [2022-03-01 17:57:30,236 INFO L78 Accepts]: Start accepts. Automaton has 6150 states and 26926 transitions. Word has length 23 [2022-03-01 17:57:30,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:30,236 INFO L470 AbstractCegarLoop]: Abstraction has 6150 states and 26926 transitions. [2022-03-01 17:57:30,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:30,236 INFO L276 IsEmpty]: Start isEmpty. Operand 6150 states and 26926 transitions. [2022-03-01 17:57:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:30,247 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:30,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:30,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-03-01 17:57:30,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:30,447 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:30,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:30,448 INFO L85 PathProgramCache]: Analyzing trace with hash 474271278, now seen corresponding path program 179 times [2022-03-01 17:57:30,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:30,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617200037] [2022-03-01 17:57:30,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:30,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:30,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:30,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617200037] [2022-03-01 17:57:30,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617200037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:30,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512436863] [2022-03-01 17:57:30,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:57:30,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:30,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:30,575 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:30,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-03-01 17:57:30,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:57:30,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:30,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:30,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:30,749 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 21 treesize of output 37 [2022-03-01 17:57:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:31,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:31,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:31,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:31,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:31,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:31,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512436863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:31,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:31,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-03-01 17:57:31,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729592655] [2022-03-01 17:57:31,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:31,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:57:31,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:31,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:57:31,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:57:31,277 INFO L87 Difference]: Start difference. First operand 6150 states and 26926 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:32,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:32,892 INFO L93 Difference]: Finished difference Result 7427 states and 31856 transitions. [2022-03-01 17:57:32,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:57:32,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:32,912 INFO L225 Difference]: With dead ends: 7427 [2022-03-01 17:57:32,912 INFO L226 Difference]: Without dead ends: 7375 [2022-03-01 17:57:32,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=309, Invalid=1853, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 17:57:32,912 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 342 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1773 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:32,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 660 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1773 Invalid, 0 Unknown, 236 Unchecked, 0.8s Time] [2022-03-01 17:57:32,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7375 states. [2022-03-01 17:57:33,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7375 to 6162. [2022-03-01 17:57:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6162 states, 6161 states have (on average 4.380620029216036) internal successors, (26989), 6161 states have internal predecessors, (26989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6162 states to 6162 states and 26989 transitions. [2022-03-01 17:57:33,031 INFO L78 Accepts]: Start accepts. Automaton has 6162 states and 26989 transitions. Word has length 23 [2022-03-01 17:57:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:33,031 INFO L470 AbstractCegarLoop]: Abstraction has 6162 states and 26989 transitions. [2022-03-01 17:57:33,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 6162 states and 26989 transitions. [2022-03-01 17:57:33,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:33,042 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:33,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:33,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:33,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:33,243 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:33,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:33,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2087838012, now seen corresponding path program 180 times [2022-03-01 17:57:33,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:33,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184313259] [2022-03-01 17:57:33,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:33,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:33,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:33,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184313259] [2022-03-01 17:57:33,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184313259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:33,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488244252] [2022-03-01 17:57:33,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:57:33,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:33,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:33,375 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:33,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-03-01 17:57:33,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:57:33,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:33,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:57:33,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:33,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:33,539 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 36 treesize of output 52 [2022-03-01 17:57:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:33,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:33,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:33,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:33,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:33,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:33,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488244252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:33,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:33,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:57:33,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492911967] [2022-03-01 17:57:33,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:33,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:57:33,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:57:33,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:57:33,869 INFO L87 Difference]: Start difference. First operand 6162 states and 26989 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:37,090 INFO L93 Difference]: Finished difference Result 7186 states and 30996 transitions. [2022-03-01 17:57:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:57:37,090 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:37,110 INFO L225 Difference]: With dead ends: 7186 [2022-03-01 17:57:37,110 INFO L226 Difference]: Without dead ends: 7165 [2022-03-01 17:57:37,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=220, Invalid=1108, Unknown=4, NotChecked=0, Total=1332 [2022-03-01 17:57:37,110 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 222 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:37,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 474 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 984 Invalid, 0 Unknown, 196 Unchecked, 0.4s Time] [2022-03-01 17:57:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2022-03-01 17:57:37,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 6182. [2022-03-01 17:57:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6182 states, 6181 states have (on average 4.38068273742113) internal successors, (27077), 6181 states have internal predecessors, (27077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6182 states to 6182 states and 27077 transitions. [2022-03-01 17:57:37,229 INFO L78 Accepts]: Start accepts. Automaton has 6182 states and 27077 transitions. Word has length 23 [2022-03-01 17:57:37,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:37,229 INFO L470 AbstractCegarLoop]: Abstraction has 6182 states and 27077 transitions. [2022-03-01 17:57:37,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:37,229 INFO L276 IsEmpty]: Start isEmpty. Operand 6182 states and 27077 transitions. [2022-03-01 17:57:37,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:37,241 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:37,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:37,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-03-01 17:57:37,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:37,442 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:37,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:37,442 INFO L85 PathProgramCache]: Analyzing trace with hash 238434704, now seen corresponding path program 181 times [2022-03-01 17:57:37,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:37,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442565858] [2022-03-01 17:57:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:37,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:37,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:37,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442565858] [2022-03-01 17:57:37,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442565858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:37,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771534924] [2022-03-01 17:57:37,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:57:37,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:37,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:37,559 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:37,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-03-01 17:57:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:37,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:37,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:37,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:37,719 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 22 treesize of output 38 [2022-03-01 17:57:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:38,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:38,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:38,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:38,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:38,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:38,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771534924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:38,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:38,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-03-01 17:57:38,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124819741] [2022-03-01 17:57:38,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:38,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:57:38,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:38,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:57:38,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:57:38,200 INFO L87 Difference]: Start difference. First operand 6182 states and 27077 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:39,767 INFO L93 Difference]: Finished difference Result 7904 states and 33751 transitions. [2022-03-01 17:57:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 17:57:39,768 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:39,791 INFO L225 Difference]: With dead ends: 7904 [2022-03-01 17:57:39,791 INFO L226 Difference]: Without dead ends: 7839 [2022-03-01 17:57:39,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:57:39,791 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 426 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:39,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 713 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1776 Invalid, 0 Unknown, 125 Unchecked, 0.8s Time] [2022-03-01 17:57:39,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7839 states. [2022-03-01 17:57:39,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7839 to 6200. [2022-03-01 17:57:39,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6200 states, 6199 states have (on average 4.384416841426036) internal successors, (27179), 6199 states have internal predecessors, (27179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6200 states to 6200 states and 27179 transitions. [2022-03-01 17:57:39,913 INFO L78 Accepts]: Start accepts. Automaton has 6200 states and 27179 transitions. Word has length 23 [2022-03-01 17:57:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:39,913 INFO L470 AbstractCegarLoop]: Abstraction has 6200 states and 27179 transitions. [2022-03-01 17:57:39,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 6200 states and 27179 transitions. [2022-03-01 17:57:39,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:39,925 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:39,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:39,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-03-01 17:57:40,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:40,126 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:40,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:40,126 INFO L85 PathProgramCache]: Analyzing trace with hash 319833760, now seen corresponding path program 182 times [2022-03-01 17:57:40,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:40,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804965422] [2022-03-01 17:57:40,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:40,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:40,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:40,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804965422] [2022-03-01 17:57:40,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804965422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:40,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938846914] [2022-03-01 17:57:40,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:57:40,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:40,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:40,254 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:40,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-03-01 17:57:40,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:40,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:40,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:40,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:40,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:40,404 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 21 treesize of output 37 [2022-03-01 17:57:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:40,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:40,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:40,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:40,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:40,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:40,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938846914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:40,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:40,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-03-01 17:57:40,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092402198] [2022-03-01 17:57:40,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:40,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:57:40,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:40,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:57:40,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:57:40,939 INFO L87 Difference]: Start difference. First operand 6200 states and 27179 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:42,799 INFO L93 Difference]: Finished difference Result 7367 states and 31706 transitions. [2022-03-01 17:57:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:57:42,799 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:42,818 INFO L225 Difference]: With dead ends: 7367 [2022-03-01 17:57:42,818 INFO L226 Difference]: Without dead ends: 7315 [2022-03-01 17:57:42,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=409, Invalid=2243, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:57:42,818 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 329 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 2200 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:42,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 790 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2200 Invalid, 0 Unknown, 254 Unchecked, 0.9s Time] [2022-03-01 17:57:42,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7315 states. [2022-03-01 17:57:42,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7315 to 6218. [2022-03-01 17:57:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6218 states, 6217 states have (on average 4.384268940003217) internal successors, (27257), 6217 states have internal predecessors, (27257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6218 states to 6218 states and 27257 transitions. [2022-03-01 17:57:42,932 INFO L78 Accepts]: Start accepts. Automaton has 6218 states and 27257 transitions. Word has length 23 [2022-03-01 17:57:42,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:42,932 INFO L470 AbstractCegarLoop]: Abstraction has 6218 states and 27257 transitions. [2022-03-01 17:57:42,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:42,933 INFO L276 IsEmpty]: Start isEmpty. Operand 6218 states and 27257 transitions. [2022-03-01 17:57:42,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:42,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:42,946 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:42,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-03-01 17:57:43,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:43,147 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:43,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:43,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1933400494, now seen corresponding path program 183 times [2022-03-01 17:57:43,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:43,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886421272] [2022-03-01 17:57:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:43,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:43,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:43,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886421272] [2022-03-01 17:57:43,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886421272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:43,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589274324] [2022-03-01 17:57:43,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:43,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:43,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:43,273 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:43,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-03-01 17:57:43,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:57:43,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:43,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:43,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:43,456 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:57:43,456 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 51 treesize of output 67 [2022-03-01 17:57:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:43,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:43,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589274324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:43,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:43,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 24 [2022-03-01 17:57:43,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892752200] [2022-03-01 17:57:43,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:43,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:57:43,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:43,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:57:43,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:57:43,781 INFO L87 Difference]: Start difference. First operand 6218 states and 27257 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:45,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:45,043 INFO L93 Difference]: Finished difference Result 6885 states and 29779 transitions. [2022-03-01 17:57:45,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:57:45,044 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:45,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:45,064 INFO L225 Difference]: With dead ends: 6885 [2022-03-01 17:57:45,064 INFO L226 Difference]: Without dead ends: 6843 [2022-03-01 17:57:45,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:57:45,064 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 341 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:45,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 572 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:57:45,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6843 states. [2022-03-01 17:57:45,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6843 to 6230. [2022-03-01 17:57:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6230 states, 6229 states have (on average 4.385936747471504) internal successors, (27320), 6229 states have internal predecessors, (27320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6230 states to 6230 states and 27320 transitions. [2022-03-01 17:57:45,241 INFO L78 Accepts]: Start accepts. Automaton has 6230 states and 27320 transitions. Word has length 23 [2022-03-01 17:57:45,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:45,241 INFO L470 AbstractCegarLoop]: Abstraction has 6230 states and 27320 transitions. [2022-03-01 17:57:45,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:45,241 INFO L276 IsEmpty]: Start isEmpty. Operand 6230 states and 27320 transitions. [2022-03-01 17:57:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:45,253 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:45,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:45,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-03-01 17:57:45,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:45,453 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:45,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:45,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2069650482, now seen corresponding path program 184 times [2022-03-01 17:57:45,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:45,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074873596] [2022-03-01 17:57:45,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:45,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:45,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:45,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074873596] [2022-03-01 17:57:45,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074873596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:45,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493476852] [2022-03-01 17:57:45,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:57:45,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:45,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:45,586 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:45,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-03-01 17:57:45,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:57:45,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:45,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:45,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:45,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:45,767 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 20 treesize of output 36 [2022-03-01 17:57:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:46,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:46,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:46,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:46,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:46,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:46,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493476852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:46,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:46,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:57:46,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812870276] [2022-03-01 17:57:46,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:46,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:57:46,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:46,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:57:46,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:57:46,305 INFO L87 Difference]: Start difference. First operand 6230 states and 27320 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:48,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:48,225 INFO L93 Difference]: Finished difference Result 7674 states and 32970 transitions. [2022-03-01 17:57:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:57:48,226 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:48,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:48,244 INFO L225 Difference]: With dead ends: 7674 [2022-03-01 17:57:48,245 INFO L226 Difference]: Without dead ends: 7630 [2022-03-01 17:57:48,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=347, Invalid=2409, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:57:48,245 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 324 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 2017 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:48,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 908 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2017 Invalid, 0 Unknown, 353 Unchecked, 0.9s Time] [2022-03-01 17:57:48,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7630 states. [2022-03-01 17:57:48,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7630 to 6232. [2022-03-01 17:57:48,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6232 states, 6231 states have (on average 4.385973359011395) internal successors, (27329), 6231 states have internal predecessors, (27329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:48,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6232 states to 6232 states and 27329 transitions. [2022-03-01 17:57:48,393 INFO L78 Accepts]: Start accepts. Automaton has 6232 states and 27329 transitions. Word has length 23 [2022-03-01 17:57:48,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:48,393 INFO L470 AbstractCegarLoop]: Abstraction has 6232 states and 27329 transitions. [2022-03-01 17:57:48,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:48,393 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states and 27329 transitions. [2022-03-01 17:57:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:48,405 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:48,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:48,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-03-01 17:57:48,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:48,606 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:48,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:48,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1639982862, now seen corresponding path program 185 times [2022-03-01 17:57:48,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:48,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067474222] [2022-03-01 17:57:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:48,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:48,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:48,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067474222] [2022-03-01 17:57:48,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067474222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:48,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911431072] [2022-03-01 17:57:48,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:57:48,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:48,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:48,747 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:48,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-03-01 17:57:48,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:57:48,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:48,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:48,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:48,910 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 21 treesize of output 37 [2022-03-01 17:57:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:49,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:49,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:49,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:49,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:49,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:49,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911431072] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:49,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:49,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:57:49,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616487107] [2022-03-01 17:57:49,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:49,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:57:49,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:57:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:57:49,508 INFO L87 Difference]: Start difference. First operand 6232 states and 27329 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:51,314 INFO L93 Difference]: Finished difference Result 7247 states and 31238 transitions. [2022-03-01 17:57:51,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:57:51,314 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:57:51,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:51,333 INFO L225 Difference]: With dead ends: 7247 [2022-03-01 17:57:51,333 INFO L226 Difference]: Without dead ends: 7195 [2022-03-01 17:57:51,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:57:51,334 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 290 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 2295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:51,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 753 Invalid, 2295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2065 Invalid, 0 Unknown, 91 Unchecked, 0.9s Time] [2022-03-01 17:57:51,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7195 states. [2022-03-01 17:57:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7195 to 6236. [2022-03-01 17:57:51,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6236 states, 6235 states have (on average 4.386046511627907) internal successors, (27347), 6235 states have internal predecessors, (27347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 27347 transitions. [2022-03-01 17:57:51,482 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 27347 transitions. Word has length 23 [2022-03-01 17:57:51,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:51,482 INFO L470 AbstractCegarLoop]: Abstraction has 6236 states and 27347 transitions. [2022-03-01 17:57:51,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 27347 transitions. [2022-03-01 17:57:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:51,494 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:51,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:51,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-03-01 17:57:51,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-03-01 17:57:51,694 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:51,695 INFO L85 PathProgramCache]: Analyzing trace with hash -26416128, now seen corresponding path program 186 times [2022-03-01 17:57:51,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:51,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232577482] [2022-03-01 17:57:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:51,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:51,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:51,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232577482] [2022-03-01 17:57:51,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232577482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:51,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616363097] [2022-03-01 17:57:51,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:57:51,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:51,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:51,881 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:51,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-03-01 17:57:51,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:57:51,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:51,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:57:51,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:52,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:52,070 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:57:52,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 49 [2022-03-01 17:57:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:52,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:52,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616363097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:52,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:52,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:57:52,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51201139] [2022-03-01 17:57:52,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:52,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:57:52,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:52,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:57:52,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:57:52,428 INFO L87 Difference]: Start difference. First operand 6236 states and 27347 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2022-03-01 17:57:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:55,287 INFO L93 Difference]: Finished difference Result 8461 states and 36100 transitions. [2022-03-01 17:57:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-01 17:57:55,288 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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 23 [2022-03-01 17:57:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:55,312 INFO L225 Difference]: With dead ends: 8461 [2022-03-01 17:57:55,312 INFO L226 Difference]: Without dead ends: 8407 [2022-03-01 17:57:55,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=837, Invalid=5015, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 17:57:55,313 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 560 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 2152 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 2152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:55,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 755 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 2152 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 17:57:55,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8407 states. [2022-03-01 17:57:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8407 to 6356. [2022-03-01 17:57:55,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6356 states, 6355 states have (on average 4.392604248623131) internal successors, (27915), 6355 states have internal predecessors, (27915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:55,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6356 states to 6356 states and 27915 transitions. [2022-03-01 17:57:55,453 INFO L78 Accepts]: Start accepts. Automaton has 6356 states and 27915 transitions. Word has length 23 [2022-03-01 17:57:55,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:55,453 INFO L470 AbstractCegarLoop]: Abstraction has 6356 states and 27915 transitions. [2022-03-01 17:57:55,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2022-03-01 17:57:55,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6356 states and 27915 transitions. [2022-03-01 17:57:55,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:55,466 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:55,466 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:55,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:55,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-03-01 17:57:55,667 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:55,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:55,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1842429102, now seen corresponding path program 187 times [2022-03-01 17:57:55,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:55,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602491699] [2022-03-01 17:57:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:55,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:55,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:55,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602491699] [2022-03-01 17:57:55,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602491699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:55,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057050340] [2022-03-01 17:57:55,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:57:55,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:55,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:55,799 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:55,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-03-01 17:57:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:55,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:55,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:55,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:55,985 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 26 treesize of output 42 [2022-03-01 17:57:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:56,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:56,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:56,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:56,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:56,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:56,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057050340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:56,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:56,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:57:56,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267555343] [2022-03-01 17:57:56,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:56,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:57:56,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:56,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:57:56,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:57:56,493 INFO L87 Difference]: Start difference. First operand 6356 states and 27915 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:58,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:58,572 INFO L93 Difference]: Finished difference Result 8396 states and 35978 transitions. [2022-03-01 17:57:58,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:57:58,573 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:57:58,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:58,598 INFO L225 Difference]: With dead ends: 8396 [2022-03-01 17:57:58,598 INFO L226 Difference]: Without dead ends: 8350 [2022-03-01 17:57:58,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=484, Invalid=3298, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 17:57:58,598 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 399 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 2036 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 2573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 371 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:58,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 934 Invalid, 2573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2036 Invalid, 0 Unknown, 371 Unchecked, 0.9s Time] [2022-03-01 17:57:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8350 states. [2022-03-01 17:57:58,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8350 to 6376. [2022-03-01 17:57:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6376 states, 6375 states have (on average 4.395764705882353) internal successors, (28023), 6375 states have internal predecessors, (28023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6376 states to 6376 states and 28023 transitions. [2022-03-01 17:57:58,734 INFO L78 Accepts]: Start accepts. Automaton has 6376 states and 28023 transitions. Word has length 23 [2022-03-01 17:57:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:58,734 INFO L470 AbstractCegarLoop]: Abstraction has 6376 states and 28023 transitions. [2022-03-01 17:57:58,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 6376 states and 28023 transitions. [2022-03-01 17:57:58,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:57:58,746 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:58,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:58,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-03-01 17:57:58,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-03-01 17:57:58,946 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:57:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:58,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1939011342, now seen corresponding path program 188 times [2022-03-01 17:57:58,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:58,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710154793] [2022-03-01 17:57:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:58,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:59,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:59,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710154793] [2022-03-01 17:57:59,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710154793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:59,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167822959] [2022-03-01 17:57:59,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:57:59,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:59,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:59,075 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:59,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-03-01 17:57:59,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:59,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:59,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:57:59,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:59,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:59,245 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 21 treesize of output 37 [2022-03-01 17:57:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:59,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:59,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:59,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:57:59,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:59,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:57:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:59,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167822959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:59,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:59,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:57:59,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713281815] [2022-03-01 17:57:59,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:59,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:57:59,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:57:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:57:59,831 INFO L87 Difference]: Start difference. First operand 6376 states and 28023 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:01,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:01,346 INFO L93 Difference]: Finished difference Result 8102 states and 34797 transitions. [2022-03-01 17:58:01,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:58:01,346 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:58:01,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:01,369 INFO L225 Difference]: With dead ends: 8102 [2022-03-01 17:58:01,369 INFO L226 Difference]: Without dead ends: 8049 [2022-03-01 17:58:01,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:58:01,369 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 307 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 2153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:01,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 715 Invalid, 2153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1951 Invalid, 0 Unknown, 79 Unchecked, 0.9s Time] [2022-03-01 17:58:01,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8049 states. [2022-03-01 17:58:01,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8049 to 6412. [2022-03-01 17:58:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6412 states, 6411 states have (on average 4.396038059585088) internal successors, (28183), 6411 states have internal predecessors, (28183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6412 states to 6412 states and 28183 transitions. [2022-03-01 17:58:01,505 INFO L78 Accepts]: Start accepts. Automaton has 6412 states and 28183 transitions. Word has length 23 [2022-03-01 17:58:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:01,505 INFO L470 AbstractCegarLoop]: Abstraction has 6412 states and 28183 transitions. [2022-03-01 17:58:01,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 6412 states and 28183 transitions. [2022-03-01 17:58:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:01,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:01,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:01,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-03-01 17:58:01,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:01,719 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:01,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:01,719 INFO L85 PathProgramCache]: Analyzing trace with hash -863300186, now seen corresponding path program 189 times [2022-03-01 17:58:01,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:01,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638705301] [2022-03-01 17:58:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:01,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:01,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:01,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638705301] [2022-03-01 17:58:01,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638705301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:01,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805994841] [2022-03-01 17:58:01,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:58:01,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:01,858 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:01,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-03-01 17:58:01,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:58:01,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:01,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:01,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:02,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:02,025 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 21 treesize of output 37 [2022-03-01 17:58:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:02,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:02,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:02,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:02,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:02,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:02,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805994841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:02,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:02,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:58:02,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853728789] [2022-03-01 17:58:02,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:02,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:58:02,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:02,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:58:02,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:58:02,644 INFO L87 Difference]: Start difference. First operand 6412 states and 28183 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:03,918 INFO L93 Difference]: Finished difference Result 7165 states and 31102 transitions. [2022-03-01 17:58:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:58:03,918 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:58:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:03,936 INFO L225 Difference]: With dead ends: 7165 [2022-03-01 17:58:03,936 INFO L226 Difference]: Without dead ends: 7144 [2022-03-01 17:58:03,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=1472, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:58:03,936 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 252 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:03,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 633 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1310 Invalid, 0 Unknown, 231 Unchecked, 0.6s Time] [2022-03-01 17:58:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2022-03-01 17:58:04,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 6408. [2022-03-01 17:58:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6408 states, 6407 states have (on average 4.395973154362416) internal successors, (28165), 6407 states have internal predecessors, (28165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6408 states to 6408 states and 28165 transitions. [2022-03-01 17:58:04,052 INFO L78 Accepts]: Start accepts. Automaton has 6408 states and 28165 transitions. Word has length 23 [2022-03-01 17:58:04,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:04,052 INFO L470 AbstractCegarLoop]: Abstraction has 6408 states and 28165 transitions. [2022-03-01 17:58:04,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 6408 states and 28165 transitions. [2022-03-01 17:58:04,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:04,065 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:04,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:04,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-03-01 17:58:04,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-03-01 17:58:04,265 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:04,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:04,265 INFO L85 PathProgramCache]: Analyzing trace with hash -582304334, now seen corresponding path program 190 times [2022-03-01 17:58:04,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:04,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516463226] [2022-03-01 17:58:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:04,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:04,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:04,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516463226] [2022-03-01 17:58:04,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516463226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:04,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746169528] [2022-03-01 17:58:04,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:58:04,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:04,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:04,406 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:04,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-03-01 17:58:04,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:58:04,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:04,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:04,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:04,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:04,546 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 21 treesize of output 37 [2022-03-01 17:58:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:06,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:07,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:07,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:07,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:07,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:07,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746169528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:07,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:07,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:58:07,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177005043] [2022-03-01 17:58:07,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:07,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:58:07,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:07,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:58:07,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=557, Unknown=1, NotChecked=0, Total=650 [2022-03-01 17:58:07,164 INFO L87 Difference]: Start difference. First operand 6408 states and 28165 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:08,556 INFO L93 Difference]: Finished difference Result 7095 states and 30816 transitions. [2022-03-01 17:58:08,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:58:08,556 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:58:08,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:08,578 INFO L225 Difference]: With dead ends: 7095 [2022-03-01 17:58:08,578 INFO L226 Difference]: Without dead ends: 7069 [2022-03-01 17:58:08,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=298, Invalid=1507, Unknown=1, NotChecked=0, Total=1806 [2022-03-01 17:58:08,579 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 306 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:08,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 549 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1466 Invalid, 0 Unknown, 145 Unchecked, 0.7s Time] [2022-03-01 17:58:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7069 states. [2022-03-01 17:58:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7069 to 6417. [2022-03-01 17:58:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6417 states, 6416 states have (on average 4.394794264339152) internal successors, (28197), 6416 states have internal predecessors, (28197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6417 states to 6417 states and 28197 transitions. [2022-03-01 17:58:08,716 INFO L78 Accepts]: Start accepts. Automaton has 6417 states and 28197 transitions. Word has length 23 [2022-03-01 17:58:08,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:08,716 INFO L470 AbstractCegarLoop]: Abstraction has 6417 states and 28197 transitions. [2022-03-01 17:58:08,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:08,716 INFO L276 IsEmpty]: Start isEmpty. Operand 6417 states and 28197 transitions. [2022-03-01 17:58:08,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:08,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:08,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:08,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:08,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-03-01 17:58:08,930 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:08,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:08,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1623880402, now seen corresponding path program 191 times [2022-03-01 17:58:08,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:08,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779352606] [2022-03-01 17:58:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:08,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:09,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:09,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779352606] [2022-03-01 17:58:09,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779352606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:09,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933994404] [2022-03-01 17:58:09,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:58:09,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:09,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:09,069 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:09,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-03-01 17:58:09,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:58:09,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:09,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:09,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:09,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:09,214 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 21 treesize of output 37 [2022-03-01 17:58:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:09,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:09,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:09,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:09,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:09,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:09,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933994404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:09,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:09,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:58:09,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390848132] [2022-03-01 17:58:09,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:09,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:58:09,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:09,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:58:09,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:58:09,955 INFO L87 Difference]: Start difference. First operand 6417 states and 28197 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:11,020 INFO L93 Difference]: Finished difference Result 7125 states and 30941 transitions. [2022-03-01 17:58:11,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:58:11,020 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:58:11,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:11,041 INFO L225 Difference]: With dead ends: 7125 [2022-03-01 17:58:11,041 INFO L226 Difference]: Without dead ends: 7097 [2022-03-01 17:58:11,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:58:11,041 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 282 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:11,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 478 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1339 Invalid, 0 Unknown, 41 Unchecked, 0.6s Time] [2022-03-01 17:58:11,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7097 states. [2022-03-01 17:58:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7097 to 6410. [2022-03-01 17:58:11,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6410 states, 6409 states have (on average 4.395849586518958) internal successors, (28173), 6409 states have internal predecessors, (28173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6410 states to 6410 states and 28173 transitions. [2022-03-01 17:58:11,172 INFO L78 Accepts]: Start accepts. Automaton has 6410 states and 28173 transitions. Word has length 23 [2022-03-01 17:58:11,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:11,172 INFO L470 AbstractCegarLoop]: Abstraction has 6410 states and 28173 transitions. [2022-03-01 17:58:11,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 6410 states and 28173 transitions. [2022-03-01 17:58:11,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:11,185 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:11,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:11,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:11,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:11,386 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:11,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:11,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1911001754, now seen corresponding path program 192 times [2022-03-01 17:58:11,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:11,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076769621] [2022-03-01 17:58:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:11,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:11,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:11,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076769621] [2022-03-01 17:58:11,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076769621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:11,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769792870] [2022-03-01 17:58:11,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:58:11,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:11,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:11,532 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:11,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-03-01 17:58:11,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:58:11,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:11,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:11,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:11,692 INFO L353 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2022-03-01 17:58:11,692 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 76 [2022-03-01 17:58:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:11,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:12,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769792870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:12,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:12,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:58:12,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460957250] [2022-03-01 17:58:12,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:12,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:58:12,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:12,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:58:12,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:58:12,095 INFO L87 Difference]: Start difference. First operand 6410 states and 28173 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:14,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:14,235 INFO L93 Difference]: Finished difference Result 8375 states and 35930 transitions. [2022-03-01 17:58:14,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 17:58:14,236 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:58:14,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:14,259 INFO L225 Difference]: With dead ends: 8375 [2022-03-01 17:58:14,259 INFO L226 Difference]: Without dead ends: 8299 [2022-03-01 17:58:14,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=651, Invalid=3771, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 17:58:14,260 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 576 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:14,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 601 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:58:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8299 states. [2022-03-01 17:58:14,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8299 to 6442. [2022-03-01 17:58:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6442 states, 6441 states have (on average 4.393727682036951) internal successors, (28300), 6441 states have internal predecessors, (28300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 28300 transitions. [2022-03-01 17:58:14,403 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 28300 transitions. Word has length 23 [2022-03-01 17:58:14,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:14,403 INFO L470 AbstractCegarLoop]: Abstraction has 6442 states and 28300 transitions. [2022-03-01 17:58:14,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 28300 transitions. [2022-03-01 17:58:14,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:14,416 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:14,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:14,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-03-01 17:58:14,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2022-03-01 17:58:14,617 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:14,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1890748156, now seen corresponding path program 193 times [2022-03-01 17:58:14,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:14,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295834854] [2022-03-01 17:58:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:14,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:14,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:14,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295834854] [2022-03-01 17:58:14,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295834854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:14,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729100353] [2022-03-01 17:58:14,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:58:14,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:14,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:14,763 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:14,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-03-01 17:58:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:14,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:14,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:14,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:14,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-03-01 17:58:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:15,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:15,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:15,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:15,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:15,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:15,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729100353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:15,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:15,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:58:15,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562069413] [2022-03-01 17:58:15,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:15,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:58:15,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:15,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:58:15,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:58:15,554 INFO L87 Difference]: Start difference. First operand 6442 states and 28300 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:16,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:16,871 INFO L93 Difference]: Finished difference Result 7092 states and 30816 transitions. [2022-03-01 17:58:16,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:58:16,871 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:58:16,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:16,891 INFO L225 Difference]: With dead ends: 7092 [2022-03-01 17:58:16,891 INFO L226 Difference]: Without dead ends: 7071 [2022-03-01 17:58:16,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:58:16,892 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 265 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:16,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 533 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1253 Invalid, 0 Unknown, 201 Unchecked, 0.6s Time] [2022-03-01 17:58:16,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7071 states. [2022-03-01 17:58:16,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7071 to 6446. [2022-03-01 17:58:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6446 states, 6445 states have (on average 4.393483320403414) internal successors, (28316), 6445 states have internal predecessors, (28316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6446 states to 6446 states and 28316 transitions. [2022-03-01 17:58:17,009 INFO L78 Accepts]: Start accepts. Automaton has 6446 states and 28316 transitions. Word has length 23 [2022-03-01 17:58:17,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:17,009 INFO L470 AbstractCegarLoop]: Abstraction has 6446 states and 28316 transitions. [2022-03-01 17:58:17,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand 6446 states and 28316 transitions. [2022-03-01 17:58:17,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:17,022 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:17,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:17,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-03-01 17:58:17,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:17,222 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:17,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:17,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1469442884, now seen corresponding path program 194 times [2022-03-01 17:58:17,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:17,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017474526] [2022-03-01 17:58:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:17,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:17,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:17,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017474526] [2022-03-01 17:58:17,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017474526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:17,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002652431] [2022-03-01 17:58:17,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:58:17,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:17,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:17,362 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:17,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-03-01 17:58:17,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:58:17,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:17,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:17,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:17,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:17,502 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 21 treesize of output 37 [2022-03-01 17:58:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:17,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:18,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:18,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:18,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:18,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:18,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002652431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:18,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:18,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:58:18,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495244386] [2022-03-01 17:58:18,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:18,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:58:18,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:58:18,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:58:18,163 INFO L87 Difference]: Start difference. First operand 6446 states and 28316 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:19,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:19,338 INFO L93 Difference]: Finished difference Result 7258 states and 31447 transitions. [2022-03-01 17:58:19,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:58:19,339 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:58:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:19,355 INFO L225 Difference]: With dead ends: 7258 [2022-03-01 17:58:19,355 INFO L226 Difference]: Without dead ends: 7208 [2022-03-01 17:58:19,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:58:19,356 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 227 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:19,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 603 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1653 Invalid, 0 Unknown, 49 Unchecked, 0.7s Time] [2022-03-01 17:58:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7208 states. [2022-03-01 17:58:19,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7208 to 6450. [2022-03-01 17:58:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6449 states have (on average 4.393549387501938) internal successors, (28334), 6449 states have internal predecessors, (28334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:19,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 28334 transitions. [2022-03-01 17:58:19,464 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 28334 transitions. Word has length 23 [2022-03-01 17:58:19,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:19,465 INFO L470 AbstractCegarLoop]: Abstraction has 6450 states and 28334 transitions. [2022-03-01 17:58:19,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:19,465 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 28334 transitions. [2022-03-01 17:58:19,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:19,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:19,476 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:19,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-03-01 17:58:19,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:19,676 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:19,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:19,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1812831880, now seen corresponding path program 195 times [2022-03-01 17:58:19,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:19,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852429391] [2022-03-01 17:58:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:19,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:19,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:19,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852429391] [2022-03-01 17:58:19,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852429391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:19,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276511016] [2022-03-01 17:58:19,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:58:19,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:19,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:19,822 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:19,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-03-01 17:58:19,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:58:19,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:19,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:19,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:19,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:19,965 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 21 treesize of output 37 [2022-03-01 17:58:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:20,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:20,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:20,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:20,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:20,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:20,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276511016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:20,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:20,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:58:20,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996223103] [2022-03-01 17:58:20,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:20,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:58:20,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:20,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:58:20,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:58:20,632 INFO L87 Difference]: Start difference. First operand 6450 states and 28334 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:22,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:22,125 INFO L93 Difference]: Finished difference Result 7204 states and 31238 transitions. [2022-03-01 17:58:22,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:58:22,126 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:58:22,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:22,145 INFO L225 Difference]: With dead ends: 7204 [2022-03-01 17:58:22,145 INFO L226 Difference]: Without dead ends: 7162 [2022-03-01 17:58:22,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=1745, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:58:22,145 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 217 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 1861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:22,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 628 Invalid, 1861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1472 Invalid, 0 Unknown, 275 Unchecked, 0.7s Time] [2022-03-01 17:58:22,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7162 states. [2022-03-01 17:58:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7162 to 6448. [2022-03-01 17:58:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6448 states, 6447 states have (on average 4.393361253296106) internal successors, (28324), 6447 states have internal predecessors, (28324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6448 states to 6448 states and 28324 transitions. [2022-03-01 17:58:22,265 INFO L78 Accepts]: Start accepts. Automaton has 6448 states and 28324 transitions. Word has length 23 [2022-03-01 17:58:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:22,266 INFO L470 AbstractCegarLoop]: Abstraction has 6448 states and 28324 transitions. [2022-03-01 17:58:22,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:22,266 INFO L276 IsEmpty]: Start isEmpty. Operand 6448 states and 28324 transitions. [2022-03-01 17:58:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:22,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:22,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:22,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-03-01 17:58:22,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-03-01 17:58:22,479 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:22,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1333269296, now seen corresponding path program 196 times [2022-03-01 17:58:22,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:22,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852980292] [2022-03-01 17:58:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:22,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:22,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:22,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852980292] [2022-03-01 17:58:22,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852980292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:22,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60257982] [2022-03-01 17:58:22,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:58:22,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:22,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:22,609 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:22,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-03-01 17:58:22,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:58:22,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:22,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:22,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:22,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:22,783 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 22 treesize of output 38 [2022-03-01 17:58:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:23,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:23,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:23,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:23,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:23,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:23,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60257982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:23,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:23,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:58:23,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523695916] [2022-03-01 17:58:23,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:23,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:58:23,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:23,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:58:23,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:58:23,296 INFO L87 Difference]: Start difference. First operand 6448 states and 28324 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:25,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:25,302 INFO L93 Difference]: Finished difference Result 8149 states and 34902 transitions. [2022-03-01 17:58:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:58:25,302 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:58:25,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:25,324 INFO L225 Difference]: With dead ends: 8149 [2022-03-01 17:58:25,324 INFO L226 Difference]: Without dead ends: 8114 [2022-03-01 17:58:25,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=373, Invalid=2383, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:58:25,325 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 336 mSDsluCounter, 1431 mSDsCounter, 0 mSdLazyCounter, 2221 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 2426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:25,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 829 Invalid, 2426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2221 Invalid, 0 Unknown, 68 Unchecked, 1.0s Time] [2022-03-01 17:58:25,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8114 states. [2022-03-01 17:58:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8114 to 6483. [2022-03-01 17:58:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6483 states, 6482 states have (on average 4.395556926874422) internal successors, (28492), 6482 states have internal predecessors, (28492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 28492 transitions. [2022-03-01 17:58:25,457 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 28492 transitions. Word has length 23 [2022-03-01 17:58:25,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:25,457 INFO L470 AbstractCegarLoop]: Abstraction has 6483 states and 28492 transitions. [2022-03-01 17:58:25,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 28492 transitions. [2022-03-01 17:58:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:25,470 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:25,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:25,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-03-01 17:58:25,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-03-01 17:58:25,671 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash 412014740, now seen corresponding path program 197 times [2022-03-01 17:58:25,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:25,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889854574] [2022-03-01 17:58:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:25,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:25,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:25,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889854574] [2022-03-01 17:58:25,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889854574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:25,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745600569] [2022-03-01 17:58:25,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:58:25,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:25,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:25,804 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:25,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-03-01 17:58:25,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:58:25,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:25,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:58:25,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:25,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:25,950 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 29 treesize of output 45 [2022-03-01 17:58:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:26,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:26,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:26,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:26,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:26,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:26,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745600569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:26,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:26,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:58:26,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101291675] [2022-03-01 17:58:26,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:26,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:58:26,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:26,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:58:26,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:58:26,285 INFO L87 Difference]: Start difference. First operand 6483 states and 28492 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:28,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:28,223 INFO L93 Difference]: Finished difference Result 7510 states and 32435 transitions. [2022-03-01 17:58:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:58:28,224 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:58:28,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:28,244 INFO L225 Difference]: With dead ends: 7510 [2022-03-01 17:58:28,244 INFO L226 Difference]: Without dead ends: 7484 [2022-03-01 17:58:28,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=342, Invalid=2310, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:58:28,245 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 319 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:28,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 691 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 17:58:28,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7484 states. [2022-03-01 17:58:28,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7484 to 6497. [2022-03-01 17:58:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6497 states, 6496 states have (on average 4.393934729064039) internal successors, (28543), 6496 states have internal predecessors, (28543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6497 states to 6497 states and 28543 transitions. [2022-03-01 17:58:28,372 INFO L78 Accepts]: Start accepts. Automaton has 6497 states and 28543 transitions. Word has length 23 [2022-03-01 17:58:28,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:28,372 INFO L470 AbstractCegarLoop]: Abstraction has 6497 states and 28543 transitions. [2022-03-01 17:58:28,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:28,372 INFO L276 IsEmpty]: Start isEmpty. Operand 6497 states and 28543 transitions. [2022-03-01 17:58:28,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:28,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:28,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:28,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-03-01 17:58:28,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-03-01 17:58:28,585 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:28,586 INFO L85 PathProgramCache]: Analyzing trace with hash -629561328, now seen corresponding path program 198 times [2022-03-01 17:58:28,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:28,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968621580] [2022-03-01 17:58:28,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:28,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:28,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:28,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968621580] [2022-03-01 17:58:28,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968621580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:28,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114343620] [2022-03-01 17:58:28,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:58:28,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:28,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:28,727 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:28,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-03-01 17:58:28,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:58:28,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:28,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:28,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:28,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:28,904 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:58:28,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2022-03-01 17:58:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:29,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:29,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114343620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:29,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:29,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-03-01 17:58:29,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368925504] [2022-03-01 17:58:29,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:29,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:58:29,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:58:29,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:58:29,229 INFO L87 Difference]: Start difference. First operand 6497 states and 28543 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:31,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:31,277 INFO L93 Difference]: Finished difference Result 9112 states and 38810 transitions. [2022-03-01 17:58:31,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-01 17:58:31,278 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:58:31,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:31,302 INFO L225 Difference]: With dead ends: 9112 [2022-03-01 17:58:31,302 INFO L226 Difference]: Without dead ends: 9046 [2022-03-01 17:58:31,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=421, Invalid=2335, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:58:31,303 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 562 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:31,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 785 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 17:58:31,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9046 states. [2022-03-01 17:58:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9046 to 6539. [2022-03-01 17:58:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6539 states, 6538 states have (on average 4.397216274089936) internal successors, (28749), 6538 states have internal predecessors, (28749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6539 states to 6539 states and 28749 transitions. [2022-03-01 17:58:31,428 INFO L78 Accepts]: Start accepts. Automaton has 6539 states and 28749 transitions. Word has length 23 [2022-03-01 17:58:31,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:31,428 INFO L470 AbstractCegarLoop]: Abstraction has 6539 states and 28749 transitions. [2022-03-01 17:58:31,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:31,428 INFO L276 IsEmpty]: Start isEmpty. Operand 6539 states and 28749 transitions. [2022-03-01 17:58:31,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:31,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:31,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:31,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-03-01 17:58:31,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:31,640 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash 426783644, now seen corresponding path program 199 times [2022-03-01 17:58:31,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:31,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568263817] [2022-03-01 17:58:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:31,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:31,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:31,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568263817] [2022-03-01 17:58:31,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568263817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:31,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189612767] [2022-03-01 17:58:31,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:58:31,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:31,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:31,789 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:31,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-03-01 17:58:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:31,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:31,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:31,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:31,970 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 22 treesize of output 38 [2022-03-01 17:58:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:32,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:32,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:32,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:32,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:32,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:32,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189612767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:32,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:32,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:58:32,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198552795] [2022-03-01 17:58:32,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:32,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:58:32,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:32,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:58:32,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:58:32,532 INFO L87 Difference]: Start difference. First operand 6539 states and 28749 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:34,229 INFO L93 Difference]: Finished difference Result 8598 states and 36735 transitions. [2022-03-01 17:58:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 17:58:34,230 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:58:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:34,251 INFO L225 Difference]: With dead ends: 8598 [2022-03-01 17:58:34,251 INFO L226 Difference]: Without dead ends: 8533 [2022-03-01 17:58:34,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:58:34,251 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 364 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 2271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:34,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 796 Invalid, 2271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2018 Invalid, 0 Unknown, 135 Unchecked, 0.9s Time] [2022-03-01 17:58:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8533 states. [2022-03-01 17:58:34,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8533 to 6571. [2022-03-01 17:58:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6571 states, 6570 states have (on average 4.400608828006089) internal successors, (28912), 6570 states have internal predecessors, (28912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:34,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6571 states to 6571 states and 28912 transitions. [2022-03-01 17:58:34,379 INFO L78 Accepts]: Start accepts. Automaton has 6571 states and 28912 transitions. Word has length 23 [2022-03-01 17:58:34,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:34,380 INFO L470 AbstractCegarLoop]: Abstraction has 6571 states and 28912 transitions. [2022-03-01 17:58:34,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:34,380 INFO L276 IsEmpty]: Start isEmpty. Operand 6571 states and 28912 transitions. [2022-03-01 17:58:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:34,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:34,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:34,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Ended with exit code 0 [2022-03-01 17:58:34,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2022-03-01 17:58:34,592 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:34,593 INFO L85 PathProgramCache]: Analyzing trace with hash -377615580, now seen corresponding path program 200 times [2022-03-01 17:58:34,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:34,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116142688] [2022-03-01 17:58:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:34,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:34,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:34,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116142688] [2022-03-01 17:58:34,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116142688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:34,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982199695] [2022-03-01 17:58:34,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:58:34,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:34,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:34,730 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:34,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-03-01 17:58:34,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:58:34,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:34,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:34,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:34,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:34,887 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 21 treesize of output 37 [2022-03-01 17:58:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:35,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:35,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:35,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:35,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:35,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:35,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982199695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:35,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:35,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:58:35,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757567303] [2022-03-01 17:58:35,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:35,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:58:35,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:58:35,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:58:35,458 INFO L87 Difference]: Start difference. First operand 6571 states and 28912 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:37,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:37,295 INFO L93 Difference]: Finished difference Result 7589 states and 32854 transitions. [2022-03-01 17:58:37,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 17:58:37,296 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:58:37,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:37,315 INFO L225 Difference]: With dead ends: 7589 [2022-03-01 17:58:37,315 INFO L226 Difference]: Without dead ends: 7537 [2022-03-01 17:58:37,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=423, Invalid=2657, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:58:37,315 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 274 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:37,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 807 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2169 Invalid, 0 Unknown, 251 Unchecked, 0.9s Time] [2022-03-01 17:58:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7537 states. [2022-03-01 17:58:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7537 to 6609. [2022-03-01 17:58:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6609 states, 6608 states have (on average 4.401029055690072) internal successors, (29082), 6608 states have internal predecessors, (29082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6609 states to 6609 states and 29082 transitions. [2022-03-01 17:58:37,449 INFO L78 Accepts]: Start accepts. Automaton has 6609 states and 29082 transitions. Word has length 23 [2022-03-01 17:58:37,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:37,449 INFO L470 AbstractCegarLoop]: Abstraction has 6609 states and 29082 transitions. [2022-03-01 17:58:37,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:37,450 INFO L276 IsEmpty]: Start isEmpty. Operand 6609 states and 29082 transitions. [2022-03-01 17:58:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:37,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:37,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:37,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:37,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-03-01 17:58:37,663 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:37,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:37,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1235951154, now seen corresponding path program 201 times [2022-03-01 17:58:37,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:37,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13863885] [2022-03-01 17:58:37,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:37,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:37,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:37,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13863885] [2022-03-01 17:58:37,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13863885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:37,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344168032] [2022-03-01 17:58:37,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:58:37,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:37,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:37,804 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:37,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-03-01 17:58:37,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:58:37,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:37,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:37,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:37,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:37,966 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 21 treesize of output 37 [2022-03-01 17:58:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:38,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:38,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:38,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:38,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:38,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:38,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344168032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:38,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:38,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:58:38,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056824136] [2022-03-01 17:58:38,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:38,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:58:38,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:38,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:58:38,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:58:38,573 INFO L87 Difference]: Start difference. First operand 6609 states and 29082 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:40,514 INFO L93 Difference]: Finished difference Result 8030 states and 34628 transitions. [2022-03-01 17:58:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 17:58:40,515 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:58:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:40,536 INFO L225 Difference]: With dead ends: 8030 [2022-03-01 17:58:40,536 INFO L226 Difference]: Without dead ends: 7988 [2022-03-01 17:58:40,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=491, Invalid=2815, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 17:58:40,536 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 414 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:40,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 628 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1510 Invalid, 0 Unknown, 220 Unchecked, 0.7s Time] [2022-03-01 17:58:40,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7988 states. [2022-03-01 17:58:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7988 to 6645. [2022-03-01 17:58:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6645 states, 6644 states have (on average 4.404425045153522) internal successors, (29263), 6644 states have internal predecessors, (29263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6645 states to 6645 states and 29263 transitions. [2022-03-01 17:58:40,667 INFO L78 Accepts]: Start accepts. Automaton has 6645 states and 29263 transitions. Word has length 23 [2022-03-01 17:58:40,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:40,667 INFO L470 AbstractCegarLoop]: Abstraction has 6645 states and 29263 transitions. [2022-03-01 17:58:40,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 6645 states and 29263 transitions. [2022-03-01 17:58:40,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:40,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:40,687 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:40,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-03-01 17:58:40,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:40,887 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:40,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:40,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1327096228, now seen corresponding path program 202 times [2022-03-01 17:58:40,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:40,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239218021] [2022-03-01 17:58:40,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:40,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:41,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:41,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239218021] [2022-03-01 17:58:41,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239218021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:41,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852898480] [2022-03-01 17:58:41,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:58:41,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:41,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:41,027 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:41,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-03-01 17:58:41,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:58:41,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:41,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:41,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:41,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:41,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-03-01 17:58:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:42,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:42,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:42,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:42,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:42,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:42,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852898480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:42,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:42,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:58:42,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905981006] [2022-03-01 17:58:42,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:42,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:58:42,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:42,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:58:42,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:58:42,354 INFO L87 Difference]: Start difference. First operand 6645 states and 29263 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:44,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:44,041 INFO L93 Difference]: Finished difference Result 7384 states and 32121 transitions. [2022-03-01 17:58:44,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:58:44,041 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:58:44,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:44,061 INFO L225 Difference]: With dead ends: 7384 [2022-03-01 17:58:44,061 INFO L226 Difference]: Without dead ends: 7358 [2022-03-01 17:58:44,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:58:44,061 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 305 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:44,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 582 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1585 Invalid, 0 Unknown, 70 Unchecked, 0.7s Time] [2022-03-01 17:58:44,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7358 states. [2022-03-01 17:58:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7358 to 6654. [2022-03-01 17:58:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6654 states, 6653 states have (on average 4.403276717270404) internal successors, (29295), 6653 states have internal predecessors, (29295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6654 states to 6654 states and 29295 transitions. [2022-03-01 17:58:44,212 INFO L78 Accepts]: Start accepts. Automaton has 6654 states and 29295 transitions. Word has length 23 [2022-03-01 17:58:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:44,212 INFO L470 AbstractCegarLoop]: Abstraction has 6654 states and 29295 transitions. [2022-03-01 17:58:44,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 6654 states and 29295 transitions. [2022-03-01 17:58:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:44,226 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:44,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:44,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-03-01 17:58:44,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:44,427 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:44,427 INFO L85 PathProgramCache]: Analyzing trace with hash 285520160, now seen corresponding path program 203 times [2022-03-01 17:58:44,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:44,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696285943] [2022-03-01 17:58:44,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:44,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:44,569 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:44,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696285943] [2022-03-01 17:58:44,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696285943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:44,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422634692] [2022-03-01 17:58:44,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:58:44,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:44,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:44,570 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:44,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-03-01 17:58:44,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:58:44,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:44,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:58:44,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:44,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:44,704 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 29 treesize of output 45 [2022-03-01 17:58:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:44,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:45,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:45,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:45,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:45,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:45,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422634692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:45,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:45,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:58:45,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628485413] [2022-03-01 17:58:45,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:45,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:58:45,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:45,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:58:45,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:58:45,120 INFO L87 Difference]: Start difference. First operand 6654 states and 29295 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:46,555 INFO L93 Difference]: Finished difference Result 7390 states and 32153 transitions. [2022-03-01 17:58:46,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:58:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:58:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:46,577 INFO L225 Difference]: With dead ends: 7390 [2022-03-01 17:58:46,578 INFO L226 Difference]: Without dead ends: 7362 [2022-03-01 17:58:46,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:58:46,578 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 311 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:46,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 433 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:58:46,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7362 states. [2022-03-01 17:58:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7362 to 6653. [2022-03-01 17:58:46,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6653 states, 6652 states have (on average 4.404539987973542) internal successors, (29299), 6652 states have internal predecessors, (29299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6653 states to 6653 states and 29299 transitions. [2022-03-01 17:58:46,731 INFO L78 Accepts]: Start accepts. Automaton has 6653 states and 29299 transitions. Word has length 23 [2022-03-01 17:58:46,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:46,731 INFO L470 AbstractCegarLoop]: Abstraction has 6653 states and 29299 transitions. [2022-03-01 17:58:46,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:46,732 INFO L276 IsEmpty]: Start isEmpty. Operand 6653 states and 29299 transitions. [2022-03-01 17:58:46,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:46,746 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:46,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:46,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-03-01 17:58:46,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:46,946 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:46,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:46,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1601192, now seen corresponding path program 204 times [2022-03-01 17:58:46,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:46,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982238519] [2022-03-01 17:58:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:46,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:47,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:47,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982238519] [2022-03-01 17:58:47,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982238519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:47,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680444093] [2022-03-01 17:58:47,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:58:47,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:47,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:47,102 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:47,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-03-01 17:58:47,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:58:47,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:47,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:47,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:47,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:47,264 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 17:58:47,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 55 [2022-03-01 17:58:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:47,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:47,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680444093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:47,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:47,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:58:47,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847699815] [2022-03-01 17:58:47,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:47,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:58:47,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:47,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:58:47,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:58:47,680 INFO L87 Difference]: Start difference. First operand 6653 states and 29299 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:50,274 INFO L93 Difference]: Finished difference Result 8708 states and 37341 transitions. [2022-03-01 17:58:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 17:58:50,275 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:58:50,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:50,300 INFO L225 Difference]: With dead ends: 8708 [2022-03-01 17:58:50,300 INFO L226 Difference]: Without dead ends: 8632 [2022-03-01 17:58:50,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=721, Invalid=3971, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 17:58:50,301 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 561 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:50,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 746 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 17:58:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8632 states. [2022-03-01 17:58:50,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8632 to 6657. [2022-03-01 17:58:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 6656 states have (on average 4.4014423076923075) internal successors, (29296), 6656 states have internal predecessors, (29296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 29296 transitions. [2022-03-01 17:58:50,452 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 29296 transitions. Word has length 23 [2022-03-01 17:58:50,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:50,452 INFO L470 AbstractCegarLoop]: Abstraction has 6657 states and 29296 transitions. [2022-03-01 17:58:50,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 29296 transitions. [2022-03-01 17:58:50,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:50,465 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:50,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:50,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-03-01 17:58:50,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2022-03-01 17:58:50,666 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:50,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:50,666 INFO L85 PathProgramCache]: Analyzing trace with hash -494818578, now seen corresponding path program 205 times [2022-03-01 17:58:50,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:50,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055560869] [2022-03-01 17:58:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:50,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:50,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:50,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055560869] [2022-03-01 17:58:50,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055560869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:50,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082994727] [2022-03-01 17:58:50,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:58:50,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:50,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:50,826 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:50,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-03-01 17:58:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:50,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:50,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:50,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:50,967 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 21 treesize of output 37 [2022-03-01 17:58:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:51,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:51,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:51,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:51,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:51,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:51,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082994727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:51,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:51,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:58:51,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111726884] [2022-03-01 17:58:51,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:51,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:58:51,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:51,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:58:51,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:58:51,615 INFO L87 Difference]: Start difference. First operand 6657 states and 29296 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:53,023 INFO L93 Difference]: Finished difference Result 7311 states and 31833 transitions. [2022-03-01 17:58:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:58:53,023 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:58:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:53,043 INFO L225 Difference]: With dead ends: 7311 [2022-03-01 17:58:53,043 INFO L226 Difference]: Without dead ends: 7290 [2022-03-01 17:58:53,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=370, Invalid=1886, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:58:53,044 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 234 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:53,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 618 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1411 Invalid, 0 Unknown, 255 Unchecked, 0.6s Time] [2022-03-01 17:58:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7290 states. [2022-03-01 17:58:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7290 to 6659. [2022-03-01 17:58:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6659 states, 6658 states have (on average 4.400420546710724) internal successors, (29298), 6658 states have internal predecessors, (29298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6659 states to 6659 states and 29298 transitions. [2022-03-01 17:58:53,175 INFO L78 Accepts]: Start accepts. Automaton has 6659 states and 29298 transitions. Word has length 23 [2022-03-01 17:58:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:53,175 INFO L470 AbstractCegarLoop]: Abstraction has 6659 states and 29298 transitions. [2022-03-01 17:58:53,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 6659 states and 29298 transitions. [2022-03-01 17:58:53,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:53,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:53,188 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:53,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:53,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-03-01 17:58:53,388 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:53,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:53,388 INFO L85 PathProgramCache]: Analyzing trace with hash 439957678, now seen corresponding path program 206 times [2022-03-01 17:58:53,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:53,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635349097] [2022-03-01 17:58:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:53,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:53,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:53,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635349097] [2022-03-01 17:58:53,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635349097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:53,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351867751] [2022-03-01 17:58:53,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:58:53,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:53,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:53,526 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:53,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-03-01 17:58:53,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:58:53,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:53,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:53,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:53,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:53,661 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 21 treesize of output 37 [2022-03-01 17:58:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:54,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:54,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:54,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:54,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:54,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:54,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351867751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:54,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:54,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:58:54,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413446547] [2022-03-01 17:58:54,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:54,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:58:54,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:54,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:58:54,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:58:54,328 INFO L87 Difference]: Start difference. First operand 6659 states and 29298 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:55,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:55,647 INFO L93 Difference]: Finished difference Result 7572 states and 32874 transitions. [2022-03-01 17:58:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:58:55,648 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:58:55,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:55,668 INFO L225 Difference]: With dead ends: 7572 [2022-03-01 17:58:55,668 INFO L226 Difference]: Without dead ends: 7547 [2022-03-01 17:58:55,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:58:55,668 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 200 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:55,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 595 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1483 Invalid, 0 Unknown, 174 Unchecked, 0.7s Time] [2022-03-01 17:58:55,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7547 states. [2022-03-01 17:58:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7547 to 6685. [2022-03-01 17:58:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6685 states, 6684 states have (on average 4.402752842609216) internal successors, (29428), 6684 states have internal predecessors, (29428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6685 states to 6685 states and 29428 transitions. [2022-03-01 17:58:55,798 INFO L78 Accepts]: Start accepts. Automaton has 6685 states and 29428 transitions. Word has length 23 [2022-03-01 17:58:55,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:55,798 INFO L470 AbstractCegarLoop]: Abstraction has 6685 states and 29428 transitions. [2022-03-01 17:58:55,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 6685 states and 29428 transitions. [2022-03-01 17:58:55,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:55,811 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:55,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:55,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:56,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-03-01 17:58:56,012 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash -572734854, now seen corresponding path program 207 times [2022-03-01 17:58:56,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:56,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921816618] [2022-03-01 17:58:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:56,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:56,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:56,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921816618] [2022-03-01 17:58:56,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921816618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:56,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515277321] [2022-03-01 17:58:56,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:58:56,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:56,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:56,153 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:56,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-03-01 17:58:56,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:58:56,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:56,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:56,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:56,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:56,294 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 21 treesize of output 37 [2022-03-01 17:58:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:56,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:56,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:56,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:56,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:56,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:56,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515277321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:56,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:56,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:58:56,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006204646] [2022-03-01 17:58:56,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:56,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:58:56,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:58:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:58:56,977 INFO L87 Difference]: Start difference. First operand 6685 states and 29428 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:58,468 INFO L93 Difference]: Finished difference Result 7388 states and 32141 transitions. [2022-03-01 17:58:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:58:58,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:58:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:58,489 INFO L225 Difference]: With dead ends: 7388 [2022-03-01 17:58:58,489 INFO L226 Difference]: Without dead ends: 7346 [2022-03-01 17:58:58,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:58:58,490 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 256 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:58,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 641 Invalid, 1870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1537 Invalid, 0 Unknown, 193 Unchecked, 0.7s Time] [2022-03-01 17:58:58,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7346 states. [2022-03-01 17:58:58,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7346 to 6695. [2022-03-01 17:58:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6694 states have (on average 4.402449955183747) internal successors, (29470), 6694 states have internal predecessors, (29470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:58,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 29470 transitions. [2022-03-01 17:58:58,618 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 29470 transitions. Word has length 23 [2022-03-01 17:58:58,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:58,618 INFO L470 AbstractCegarLoop]: Abstraction has 6695 states and 29470 transitions. [2022-03-01 17:58:58,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:58,619 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 29470 transitions. [2022-03-01 17:58:58,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:58:58,631 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:58,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:58,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-03-01 17:58:58,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable322,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:58,831 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:58:58,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:58,832 INFO L85 PathProgramCache]: Analyzing trace with hash -480952808, now seen corresponding path program 208 times [2022-03-01 17:58:58,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:58,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853863506] [2022-03-01 17:58:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:58,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:58,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:58,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853863506] [2022-03-01 17:58:58,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853863506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:58,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477889533] [2022-03-01 17:58:58,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:58:58,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:58,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:58,944 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:58,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-03-01 17:58:58,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:58:58,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:58,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:58:58,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:59,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:59,125 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 22 treesize of output 38 [2022-03-01 17:58:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:59,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:59,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:59,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:58:59,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:59,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:58:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:59,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477889533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:59,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:59,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:58:59,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161597231] [2022-03-01 17:58:59,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:59,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:58:59,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:59,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:58:59,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:58:59,616 INFO L87 Difference]: Start difference. First operand 6695 states and 29470 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:00,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:00,879 INFO L93 Difference]: Finished difference Result 7149 states and 31244 transitions. [2022-03-01 17:59:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:59:00,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:00,897 INFO L225 Difference]: With dead ends: 7149 [2022-03-01 17:59:00,897 INFO L226 Difference]: Without dead ends: 7127 [2022-03-01 17:59:00,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:59:00,898 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 177 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:00,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 758 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1533 Invalid, 0 Unknown, 279 Unchecked, 0.6s Time] [2022-03-01 17:59:00,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7127 states. [2022-03-01 17:59:01,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7127 to 6701. [2022-03-01 17:59:01,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6701 states, 6700 states have (on average 4.402537313432836) internal successors, (29497), 6700 states have internal predecessors, (29497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6701 states to 6701 states and 29497 transitions. [2022-03-01 17:59:01,044 INFO L78 Accepts]: Start accepts. Automaton has 6701 states and 29497 transitions. Word has length 23 [2022-03-01 17:59:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:01,044 INFO L470 AbstractCegarLoop]: Abstraction has 6701 states and 29497 transitions. [2022-03-01 17:59:01,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:01,044 INFO L276 IsEmpty]: Start isEmpty. Operand 6701 states and 29497 transitions. [2022-03-01 17:59:01,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:01,057 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:01,057 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:01,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-03-01 17:59:01,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-03-01 17:59:01,257 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:01,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:01,258 INFO L85 PathProgramCache]: Analyzing trace with hash 104381144, now seen corresponding path program 209 times [2022-03-01 17:59:01,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:01,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301576740] [2022-03-01 17:59:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:01,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:01,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:01,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301576740] [2022-03-01 17:59:01,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301576740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:01,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354576480] [2022-03-01 17:59:01,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:59:01,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:01,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:01,375 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:01,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-03-01 17:59:01,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:59:01,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:01,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:01,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:01,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:01,533 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 21 treesize of output 37 [2022-03-01 17:59:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:01,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:02,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:02,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:02,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:02,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354576480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:02,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:02,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:59:02,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806299869] [2022-03-01 17:59:02,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:02,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:59:02,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:02,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:59:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:59:02,088 INFO L87 Difference]: Start difference. First operand 6701 states and 29497 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:03,258 INFO L93 Difference]: Finished difference Result 7264 states and 31636 transitions. [2022-03-01 17:59:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:59:03,258 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:03,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:03,278 INFO L225 Difference]: With dead ends: 7264 [2022-03-01 17:59:03,278 INFO L226 Difference]: Without dead ends: 7212 [2022-03-01 17:59:03,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=1020, Unknown=1, NotChecked=0, Total=1190 [2022-03-01 17:59:03,278 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 197 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:03,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 494 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1325 Invalid, 0 Unknown, 140 Unchecked, 0.6s Time] [2022-03-01 17:59:03,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7212 states. [2022-03-01 17:59:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7212 to 6703. [2022-03-01 17:59:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6703 states, 6702 states have (on average 4.402566398090122) internal successors, (29506), 6702 states have internal predecessors, (29506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:03,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6703 states to 6703 states and 29506 transitions. [2022-03-01 17:59:03,441 INFO L78 Accepts]: Start accepts. Automaton has 6703 states and 29506 transitions. Word has length 23 [2022-03-01 17:59:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:03,441 INFO L470 AbstractCegarLoop]: Abstraction has 6703 states and 29506 transitions. [2022-03-01 17:59:03,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:03,442 INFO L276 IsEmpty]: Start isEmpty. Operand 6703 states and 29506 transitions. [2022-03-01 17:59:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:03,454 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:03,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:03,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-03-01 17:59:03,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2022-03-01 17:59:03,654 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:03,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1717947878, now seen corresponding path program 210 times [2022-03-01 17:59:03,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:03,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322678865] [2022-03-01 17:59:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:03,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:03,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:03,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322678865] [2022-03-01 17:59:03,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322678865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:03,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061783414] [2022-03-01 17:59:03,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:03,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:03,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:03,774 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:03,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-03-01 17:59:03,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:59:03,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:03,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:03,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:03,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:03,938 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 25 treesize of output 41 [2022-03-01 17:59:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:04,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:04,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:04,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:04,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:04,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061783414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:04,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:04,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:59:04,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990075831] [2022-03-01 17:59:04,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:04,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:59:04,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:04,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:59:04,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:59:04,500 INFO L87 Difference]: Start difference. First operand 6703 states and 29506 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:05,283 INFO L93 Difference]: Finished difference Result 7071 states and 30912 transitions. [2022-03-01 17:59:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:59:05,284 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:05,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:05,304 INFO L225 Difference]: With dead ends: 7071 [2022-03-01 17:59:05,304 INFO L226 Difference]: Without dead ends: 7050 [2022-03-01 17:59:05,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:59:05,305 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 200 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:05,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 425 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 914 Invalid, 0 Unknown, 138 Unchecked, 0.4s Time] [2022-03-01 17:59:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2022-03-01 17:59:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6703. [2022-03-01 17:59:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6703 states, 6702 states have (on average 4.402566398090122) internal successors, (29506), 6702 states have internal predecessors, (29506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6703 states to 6703 states and 29506 transitions. [2022-03-01 17:59:05,491 INFO L78 Accepts]: Start accepts. Automaton has 6703 states and 29506 transitions. Word has length 23 [2022-03-01 17:59:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:05,491 INFO L470 AbstractCegarLoop]: Abstraction has 6703 states and 29506 transitions. [2022-03-01 17:59:05,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 6703 states and 29506 transitions. [2022-03-01 17:59:05,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:05,505 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:05,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:05,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-03-01 17:59:05,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:05,705 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -708174188, now seen corresponding path program 211 times [2022-03-01 17:59:05,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:05,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424402071] [2022-03-01 17:59:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:05,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:05,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:05,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424402071] [2022-03-01 17:59:05,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424402071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:05,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184497677] [2022-03-01 17:59:05,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:59:05,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:05,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:05,826 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:05,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-03-01 17:59:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:05,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:05,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:06,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:06,006 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 22 treesize of output 38 [2022-03-01 17:59:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:06,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:06,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:06,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:06,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:06,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:06,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184497677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:06,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:06,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:59:06,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374520520] [2022-03-01 17:59:06,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:06,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:59:06,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:06,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:59:06,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:59:06,521 INFO L87 Difference]: Start difference. First operand 6703 states and 29506 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:07,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:07,382 INFO L93 Difference]: Finished difference Result 7197 states and 31431 transitions. [2022-03-01 17:59:07,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:59:07,383 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:07,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:07,401 INFO L225 Difference]: With dead ends: 7197 [2022-03-01 17:59:07,402 INFO L226 Difference]: Without dead ends: 7175 [2022-03-01 17:59:07,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:59:07,402 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 196 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:07,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 606 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1279 Invalid, 0 Unknown, 267 Unchecked, 0.5s Time] [2022-03-01 17:59:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7175 states. [2022-03-01 17:59:07,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7175 to 6707. [2022-03-01 17:59:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6707 states, 6706 states have (on average 4.4026245153593795) internal successors, (29524), 6706 states have internal predecessors, (29524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6707 states to 6707 states and 29524 transitions. [2022-03-01 17:59:07,527 INFO L78 Accepts]: Start accepts. Automaton has 6707 states and 29524 transitions. Word has length 23 [2022-03-01 17:59:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:07,527 INFO L470 AbstractCegarLoop]: Abstraction has 6707 states and 29524 transitions. [2022-03-01 17:59:07,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:07,527 INFO L276 IsEmpty]: Start isEmpty. Operand 6707 states and 29524 transitions. [2022-03-01 17:59:07,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:07,573 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:07,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:07,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-03-01 17:59:07,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:07,773 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:07,774 INFO L85 PathProgramCache]: Analyzing trace with hash -194647336, now seen corresponding path program 212 times [2022-03-01 17:59:07,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:07,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130195863] [2022-03-01 17:59:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:07,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:07,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:07,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130195863] [2022-03-01 17:59:07,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130195863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:07,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102570884] [2022-03-01 17:59:07,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:59:07,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:07,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:07,902 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:07,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-03-01 17:59:07,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:59:07,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:07,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:07,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:08,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:08,065 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 21 treesize of output 37 [2022-03-01 17:59:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:08,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:08,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:08,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:08,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:08,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:08,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102570884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:08,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:08,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:59:08,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772044075] [2022-03-01 17:59:08,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:08,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:59:08,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:08,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:59:08,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:59:08,635 INFO L87 Difference]: Start difference. First operand 6707 states and 29524 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:09,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:09,687 INFO L93 Difference]: Finished difference Result 7160 states and 31255 transitions. [2022-03-01 17:59:09,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:59:09,687 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:59:09,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:09,706 INFO L225 Difference]: With dead ends: 7160 [2022-03-01 17:59:09,706 INFO L226 Difference]: Without dead ends: 7135 [2022-03-01 17:59:09,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:59:09,706 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 246 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:09,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 574 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1513 Invalid, 0 Unknown, 161 Unchecked, 0.6s Time] [2022-03-01 17:59:09,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7135 states. [2022-03-01 17:59:09,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7135 to 6709. [2022-03-01 17:59:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6709 states, 6708 states have (on average 4.402802623732856) internal successors, (29534), 6708 states have internal predecessors, (29534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 29534 transitions. [2022-03-01 17:59:09,822 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 29534 transitions. Word has length 23 [2022-03-01 17:59:09,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:09,822 INFO L470 AbstractCegarLoop]: Abstraction has 6709 states and 29534 transitions. [2022-03-01 17:59:09,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:09,822 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 29534 transitions. [2022-03-01 17:59:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:09,859 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:09,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:09,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Ended with exit code 0 [2022-03-01 17:59:10,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2022-03-01 17:59:10,059 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:10,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash 881063820, now seen corresponding path program 213 times [2022-03-01 17:59:10,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:10,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817056329] [2022-03-01 17:59:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:10,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:10,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:10,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817056329] [2022-03-01 17:59:10,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817056329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:10,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203258198] [2022-03-01 17:59:10,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:59:10,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:10,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:10,186 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:10,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-03-01 17:59:10,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:59:10,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:10,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:10,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:10,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:10,349 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 25 treesize of output 41 [2022-03-01 17:59:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:10,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:10,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:10,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:10,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:10,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:10,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203258198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:10,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:10,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:59:10,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490801548] [2022-03-01 17:59:10,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:10,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:59:10,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:10,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:59:10,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:59:10,944 INFO L87 Difference]: Start difference. First operand 6709 states and 29534 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:12,229 INFO L93 Difference]: Finished difference Result 7158 states and 31250 transitions. [2022-03-01 17:59:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:59:12,230 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 [2022-03-01 17:59:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:12,247 INFO L225 Difference]: With dead ends: 7158 [2022-03-01 17:59:12,247 INFO L226 Difference]: Without dead ends: 7137 [2022-03-01 17:59:12,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=242, Invalid=1479, Unknown=1, NotChecked=0, Total=1722 [2022-03-01 17:59:12,247 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 242 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:12,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 538 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1278 Invalid, 0 Unknown, 312 Unchecked, 0.5s Time] [2022-03-01 17:59:12,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7137 states. [2022-03-01 17:59:12,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7137 to 6703. [2022-03-01 17:59:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6703 states, 6702 states have (on average 4.402566398090122) internal successors, (29506), 6702 states have internal predecessors, (29506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:12,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6703 states to 6703 states and 29506 transitions. [2022-03-01 17:59:12,369 INFO L78 Accepts]: Start accepts. Automaton has 6703 states and 29506 transitions. Word has length 23 [2022-03-01 17:59:12,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:12,370 INFO L470 AbstractCegarLoop]: Abstraction has 6703 states and 29506 transitions. [2022-03-01 17:59:12,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 6703 states and 29506 transitions. [2022-03-01 17:59:12,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:12,409 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:12,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:12,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-03-01 17:59:12,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:12,609 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:12,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:12,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1162059672, now seen corresponding path program 214 times [2022-03-01 17:59:12,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:12,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038535541] [2022-03-01 17:59:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:12,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:12,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:12,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038535541] [2022-03-01 17:59:12,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038535541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:12,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199975571] [2022-03-01 17:59:12,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:59:12,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:12,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:12,741 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:12,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-03-01 17:59:12,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:59:12,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:12,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:12,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:12,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:12,879 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 21 treesize of output 37 [2022-03-01 17:59:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:13,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:13,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:13,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:13,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:13,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:13,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199975571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:13,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:13,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:59:13,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793198167] [2022-03-01 17:59:13,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:13,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:59:13,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:13,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:59:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:59:13,468 INFO L87 Difference]: Start difference. First operand 6703 states and 29506 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:14,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:14,295 INFO L93 Difference]: Finished difference Result 7123 states and 31116 transitions. [2022-03-01 17:59:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:59:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:14,316 INFO L225 Difference]: With dead ends: 7123 [2022-03-01 17:59:14,316 INFO L226 Difference]: Without dead ends: 7097 [2022-03-01 17:59:14,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:59:14,317 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 206 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:14,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 405 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1172 Invalid, 0 Unknown, 38 Unchecked, 0.5s Time] [2022-03-01 17:59:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7097 states. [2022-03-01 17:59:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7097 to 6712. [2022-03-01 17:59:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6712 states, 6711 states have (on average 4.401430487259723) internal successors, (29538), 6711 states have internal predecessors, (29538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 29538 transitions. [2022-03-01 17:59:14,458 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 29538 transitions. Word has length 23 [2022-03-01 17:59:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:14,458 INFO L470 AbstractCegarLoop]: Abstraction has 6712 states and 29538 transitions. [2022-03-01 17:59:14,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 29538 transitions. [2022-03-01 17:59:14,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:14,472 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:14,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:14,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2022-03-01 17:59:14,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:14,672 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:14,672 INFO L85 PathProgramCache]: Analyzing trace with hash 120483604, now seen corresponding path program 215 times [2022-03-01 17:59:14,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:14,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406017385] [2022-03-01 17:59:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:14,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:14,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:14,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406017385] [2022-03-01 17:59:14,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406017385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:14,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457637220] [2022-03-01 17:59:14,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:59:14,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:14,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:14,813 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:14,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-03-01 17:59:14,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:59:14,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:14,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:15,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:15,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:15,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:15,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 53 [2022-03-01 17:59:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:15,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:15,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:15,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-01 17:59:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:15,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457637220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:15,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:15,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:59:15,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826894461] [2022-03-01 17:59:15,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:15,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:59:15,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:15,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:59:15,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:59:15,583 INFO L87 Difference]: Start difference. First operand 6712 states and 29538 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:17,153 INFO L93 Difference]: Finished difference Result 8445 states and 36320 transitions. [2022-03-01 17:59:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:59:17,154 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:17,177 INFO L225 Difference]: With dead ends: 8445 [2022-03-01 17:59:17,177 INFO L226 Difference]: Without dead ends: 8375 [2022-03-01 17:59:17,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=408, Invalid=1848, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:59:17,178 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 305 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:17,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 563 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:59:17,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8375 states. [2022-03-01 17:59:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8375 to 6743. [2022-03-01 17:59:17,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6743 states, 6742 states have (on average 4.404627706911896) internal successors, (29696), 6742 states have internal predecessors, (29696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6743 states to 6743 states and 29696 transitions. [2022-03-01 17:59:17,366 INFO L78 Accepts]: Start accepts. Automaton has 6743 states and 29696 transitions. Word has length 23 [2022-03-01 17:59:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:17,366 INFO L470 AbstractCegarLoop]: Abstraction has 6743 states and 29696 transitions. [2022-03-01 17:59:17,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 6743 states and 29696 transitions. [2022-03-01 17:59:17,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:17,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:17,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:17,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-03-01 17:59:17,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:17,580 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash -659855134, now seen corresponding path program 216 times [2022-03-01 17:59:17,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:17,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115986524] [2022-03-01 17:59:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:17,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:17,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:17,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115986524] [2022-03-01 17:59:17,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115986524] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:17,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068711450] [2022-03-01 17:59:17,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:17,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:17,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:17,715 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:17,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-03-01 17:59:17,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:59:17,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:17,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:59:17,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:17,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:17,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:17,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 55 [2022-03-01 17:59:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:18,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:18,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:59:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:18,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068711450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:18,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:18,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-03-01 17:59:18,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105809162] [2022-03-01 17:59:18,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:18,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:59:18,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:18,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:59:18,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:59:18,351 INFO L87 Difference]: Start difference. First operand 6743 states and 29696 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:19,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:19,671 INFO L93 Difference]: Finished difference Result 7272 states and 31688 transitions. [2022-03-01 17:59:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:59:19,672 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:19,690 INFO L225 Difference]: With dead ends: 7272 [2022-03-01 17:59:19,690 INFO L226 Difference]: Without dead ends: 7230 [2022-03-01 17:59:19,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=348, Invalid=2102, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:59:19,691 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 371 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:19,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 595 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1482 Invalid, 0 Unknown, 39 Unchecked, 0.6s Time] [2022-03-01 17:59:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7230 states. [2022-03-01 17:59:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7230 to 6751. [2022-03-01 17:59:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6751 states, 6750 states have (on average 4.405037037037037) internal successors, (29734), 6750 states have internal predecessors, (29734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6751 states to 6751 states and 29734 transitions. [2022-03-01 17:59:19,844 INFO L78 Accepts]: Start accepts. Automaton has 6751 states and 29734 transitions. Word has length 23 [2022-03-01 17:59:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:19,844 INFO L470 AbstractCegarLoop]: Abstraction has 6751 states and 29734 transitions. [2022-03-01 17:59:19,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 6751 states and 29734 transitions. [2022-03-01 17:59:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:19,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:19,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:19,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Ended with exit code 0 [2022-03-01 17:59:20,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:20,058 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:20,058 INFO L85 PathProgramCache]: Analyzing trace with hash 274921122, now seen corresponding path program 217 times [2022-03-01 17:59:20,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:20,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913615303] [2022-03-01 17:59:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:20,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:20,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:20,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913615303] [2022-03-01 17:59:20,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913615303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:20,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797606446] [2022-03-01 17:59:20,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:59:20,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:20,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:20,212 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:20,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-03-01 17:59:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:20,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:20,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:20,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:20,367 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 21 treesize of output 37 [2022-03-01 17:59:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:20,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:21,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:21,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:21,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:21,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:21,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797606446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:21,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:21,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:59:21,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349886069] [2022-03-01 17:59:21,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:21,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:59:21,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:21,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:59:21,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:59:21,097 INFO L87 Difference]: Start difference. First operand 6751 states and 29734 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:22,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:22,229 INFO L93 Difference]: Finished difference Result 7185 states and 31399 transitions. [2022-03-01 17:59:22,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:59:22,229 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:22,252 INFO L225 Difference]: With dead ends: 7185 [2022-03-01 17:59:22,252 INFO L226 Difference]: Without dead ends: 7160 [2022-03-01 17:59:22,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:59:22,252 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 210 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:22,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 518 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1371 Invalid, 0 Unknown, 92 Unchecked, 0.6s Time] [2022-03-01 17:59:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7160 states. [2022-03-01 17:59:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7160 to 6753. [2022-03-01 17:59:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6753 states, 6752 states have (on average 4.4052132701421804) internal successors, (29744), 6752 states have internal predecessors, (29744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6753 states to 6753 states and 29744 transitions. [2022-03-01 17:59:22,440 INFO L78 Accepts]: Start accepts. Automaton has 6753 states and 29744 transitions. Word has length 23 [2022-03-01 17:59:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:22,440 INFO L470 AbstractCegarLoop]: Abstraction has 6753 states and 29744 transitions. [2022-03-01 17:59:22,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:22,440 INFO L276 IsEmpty]: Start isEmpty. Operand 6753 states and 29744 transitions. [2022-03-01 17:59:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:22,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:22,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:22,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-03-01 17:59:22,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-03-01 17:59:22,655 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:22,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:22,656 INFO L85 PathProgramCache]: Analyzing trace with hash -737771410, now seen corresponding path program 218 times [2022-03-01 17:59:22,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:22,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674766862] [2022-03-01 17:59:22,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:22,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:22,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:22,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674766862] [2022-03-01 17:59:22,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674766862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:22,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882920785] [2022-03-01 17:59:22,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:59:22,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:22,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:22,806 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:22,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-03-01 17:59:22,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:59:22,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:22,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:22,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:22,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:22,961 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 21 treesize of output 37 [2022-03-01 17:59:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:23,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:23,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:23,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:23,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:23,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:23,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882920785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:23,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:23,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:59:23,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580495406] [2022-03-01 17:59:23,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:23,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:59:23,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:23,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:59:23,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:59:23,727 INFO L87 Difference]: Start difference. First operand 6753 states and 29744 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:24,777 INFO L93 Difference]: Finished difference Result 7177 states and 31368 transitions. [2022-03-01 17:59:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:59:24,777 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:24,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:24,795 INFO L225 Difference]: With dead ends: 7177 [2022-03-01 17:59:24,795 INFO L226 Difference]: Without dead ends: 7156 [2022-03-01 17:59:24,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:59:24,795 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 256 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:24,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 430 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 974 Invalid, 0 Unknown, 266 Unchecked, 0.4s Time] [2022-03-01 17:59:24,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7156 states. [2022-03-01 17:59:24,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7156 to 6751. [2022-03-01 17:59:24,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6751 states, 6750 states have (on average 4.405037037037037) internal successors, (29734), 6750 states have internal predecessors, (29734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:24,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6751 states to 6751 states and 29734 transitions. [2022-03-01 17:59:24,911 INFO L78 Accepts]: Start accepts. Automaton has 6751 states and 29734 transitions. Word has length 23 [2022-03-01 17:59:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:24,912 INFO L470 AbstractCegarLoop]: Abstraction has 6751 states and 29734 transitions. [2022-03-01 17:59:24,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:24,912 INFO L276 IsEmpty]: Start isEmpty. Operand 6751 states and 29734 transitions. [2022-03-01 17:59:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:24,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:24,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:24,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Ended with exit code 0 [2022-03-01 17:59:25,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-03-01 17:59:25,125 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:25,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1556796660, now seen corresponding path program 219 times [2022-03-01 17:59:25,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:25,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297467581] [2022-03-01 17:59:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:25,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:25,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:25,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297467581] [2022-03-01 17:59:25,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297467581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:25,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621820131] [2022-03-01 17:59:25,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:59:25,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:25,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:25,246 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:25,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-03-01 17:59:25,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:59:25,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:25,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:25,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:25,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:25,439 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 26 treesize of output 42 [2022-03-01 17:59:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:25,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:25,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:25,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:25,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:25,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:25,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621820131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:25,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:25,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 17:59:25,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795638420] [2022-03-01 17:59:25,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:25,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:59:25,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:25,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:59:25,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:59:25,952 INFO L87 Difference]: Start difference. First operand 6751 states and 29734 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:26,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:26,941 INFO L93 Difference]: Finished difference Result 7587 states and 33005 transitions. [2022-03-01 17:59:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:59:26,941 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:26,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:26,962 INFO L225 Difference]: With dead ends: 7587 [2022-03-01 17:59:26,962 INFO L226 Difference]: Without dead ends: 7565 [2022-03-01 17:59:26,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:59:26,962 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 265 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:26,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 712 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1610 Invalid, 0 Unknown, 185 Unchecked, 0.6s Time] [2022-03-01 17:59:26,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7565 states. [2022-03-01 17:59:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7565 to 6757. [2022-03-01 17:59:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 6756 states have (on average 4.404825340438129) internal successors, (29759), 6756 states have internal predecessors, (29759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:27,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 29759 transitions. [2022-03-01 17:59:27,090 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 29759 transitions. Word has length 23 [2022-03-01 17:59:27,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:27,090 INFO L470 AbstractCegarLoop]: Abstraction has 6757 states and 29759 transitions. [2022-03-01 17:59:27,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 29759 transitions. [2022-03-01 17:59:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:27,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:27,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:27,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:27,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-03-01 17:59:27,304 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:27,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:27,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1043269808, now seen corresponding path program 220 times [2022-03-01 17:59:27,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:27,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671851912] [2022-03-01 17:59:27,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:27,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:27,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:27,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671851912] [2022-03-01 17:59:27,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671851912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:27,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895561851] [2022-03-01 17:59:27,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:59:27,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:27,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:27,426 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:27,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-03-01 17:59:27,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:59:27,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:27,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:27,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:27,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:27,580 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 21 treesize of output 37 [2022-03-01 17:59:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:27,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:28,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:28,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:28,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:28,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:28,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895561851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:28,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:28,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:59:28,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845294352] [2022-03-01 17:59:28,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:28,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:59:28,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:28,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:59:28,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:59:28,117 INFO L87 Difference]: Start difference. First operand 6757 states and 29759 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:29,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:29,133 INFO L93 Difference]: Finished difference Result 7462 states and 32482 transitions. [2022-03-01 17:59:29,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:59:29,133 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:29,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:29,153 INFO L225 Difference]: With dead ends: 7462 [2022-03-01 17:59:29,153 INFO L226 Difference]: Without dead ends: 7437 [2022-03-01 17:59:29,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=1178, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:59:29,153 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 273 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:29,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 545 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1364 Invalid, 0 Unknown, 76 Unchecked, 0.6s Time] [2022-03-01 17:59:29,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7437 states. [2022-03-01 17:59:29,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7437 to 6759. [2022-03-01 17:59:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6759 states, 6758 states have (on average 4.40500147972773) internal successors, (29769), 6758 states have internal predecessors, (29769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6759 states to 6759 states and 29769 transitions. [2022-03-01 17:59:29,277 INFO L78 Accepts]: Start accepts. Automaton has 6759 states and 29769 transitions. Word has length 23 [2022-03-01 17:59:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:29,277 INFO L470 AbstractCegarLoop]: Abstraction has 6759 states and 29769 transitions. [2022-03-01 17:59:29,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 6759 states and 29769 transitions. [2022-03-01 17:59:29,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:29,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:29,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:29,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-03-01 17:59:29,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:29,490 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:29,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:29,490 INFO L85 PathProgramCache]: Analyzing trace with hash 32441348, now seen corresponding path program 221 times [2022-03-01 17:59:29,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:29,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363087875] [2022-03-01 17:59:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:29,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:29,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:29,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363087875] [2022-03-01 17:59:29,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363087875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:29,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617941226] [2022-03-01 17:59:29,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:59:29,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:29,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:29,616 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:29,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-03-01 17:59:29,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:59:29,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:29,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:29,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:29,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:29,767 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 21 treesize of output 37 [2022-03-01 17:59:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:30,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:30,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:30,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:30,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:30,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:30,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617941226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:30,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:30,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:59:30,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388175078] [2022-03-01 17:59:30,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:30,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:59:30,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:30,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:59:30,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:59:30,365 INFO L87 Difference]: Start difference. First operand 6759 states and 29769 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:31,405 INFO L93 Difference]: Finished difference Result 7437 states and 32385 transitions. [2022-03-01 17:59:31,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:59:31,405 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:31,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:31,424 INFO L225 Difference]: With dead ends: 7437 [2022-03-01 17:59:31,424 INFO L226 Difference]: Without dead ends: 7416 [2022-03-01 17:59:31,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:59:31,425 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 272 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:31,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 545 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1228 Invalid, 0 Unknown, 207 Unchecked, 0.5s Time] [2022-03-01 17:59:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7416 states. [2022-03-01 17:59:31,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7416 to 6753. [2022-03-01 17:59:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6753 states, 6752 states have (on average 4.404768957345971) internal successors, (29741), 6752 states have internal predecessors, (29741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6753 states to 6753 states and 29741 transitions. [2022-03-01 17:59:31,544 INFO L78 Accepts]: Start accepts. Automaton has 6753 states and 29741 transitions. Word has length 23 [2022-03-01 17:59:31,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:31,544 INFO L470 AbstractCegarLoop]: Abstraction has 6753 states and 29741 transitions. [2022-03-01 17:59:31,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 6753 states and 29741 transitions. [2022-03-01 17:59:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:31,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:31,557 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:31,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-03-01 17:59:31,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:31,757 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:31,757 INFO L85 PathProgramCache]: Analyzing trace with hash -559543840, now seen corresponding path program 222 times [2022-03-01 17:59:31,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:31,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045092513] [2022-03-01 17:59:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:31,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:31,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:31,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045092513] [2022-03-01 17:59:31,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045092513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:31,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982007156] [2022-03-01 17:59:31,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:31,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:31,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:31,895 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:31,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-03-01 17:59:31,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:59:31,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:31,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:59:31,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:32,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:32,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2022-03-01 17:59:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:32,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:32,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:32,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:32,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:32,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:32,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982007156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:32,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:32,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:59:32,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119800632] [2022-03-01 17:59:32,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:32,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:59:32,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:32,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:59:32,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:59:32,481 INFO L87 Difference]: Start difference. First operand 6753 states and 29741 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:33,605 INFO L93 Difference]: Finished difference Result 7237 states and 31596 transitions. [2022-03-01 17:59:33,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:59:33,605 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:33,623 INFO L225 Difference]: With dead ends: 7237 [2022-03-01 17:59:33,623 INFO L226 Difference]: Without dead ends: 7212 [2022-03-01 17:59:33,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=221, Invalid=1110, Unknown=1, NotChecked=0, Total=1332 [2022-03-01 17:59:33,623 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 218 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:33,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 603 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1390 Invalid, 0 Unknown, 223 Unchecked, 0.6s Time] [2022-03-01 17:59:33,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7212 states. [2022-03-01 17:59:33,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7212 to 6759. [2022-03-01 17:59:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6759 states, 6758 states have (on average 4.404113643089672) internal successors, (29763), 6758 states have internal predecessors, (29763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:33,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6759 states to 6759 states and 29763 transitions. [2022-03-01 17:59:33,743 INFO L78 Accepts]: Start accepts. Automaton has 6759 states and 29763 transitions. Word has length 23 [2022-03-01 17:59:33,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:33,744 INFO L470 AbstractCegarLoop]: Abstraction has 6759 states and 29763 transitions. [2022-03-01 17:59:33,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 6759 states and 29763 transitions. [2022-03-01 17:59:33,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:33,756 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:33,756 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:33,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Ended with exit code 0 [2022-03-01 17:59:33,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2022-03-01 17:59:33,956 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:33,957 INFO L85 PathProgramCache]: Analyzing trace with hash 252454714, now seen corresponding path program 223 times [2022-03-01 17:59:33,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:33,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186478086] [2022-03-01 17:59:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:33,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:34,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:34,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186478086] [2022-03-01 17:59:34,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186478086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:34,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969973712] [2022-03-01 17:59:34,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:59:34,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:34,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:34,077 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:34,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-03-01 17:59:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:34,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:34,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:34,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:34,255 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 22 treesize of output 38 [2022-03-01 17:59:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:34,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:34,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:34,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:34,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:34,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:34,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969973712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:34,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:34,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:59:34,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705177229] [2022-03-01 17:59:34,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:34,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:59:34,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:34,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:59:34,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:59:34,804 INFO L87 Difference]: Start difference. First operand 6759 states and 29763 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:35,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:35,536 INFO L93 Difference]: Finished difference Result 7118 states and 31134 transitions. [2022-03-01 17:59:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:59:35,536 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:35,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:35,557 INFO L225 Difference]: With dead ends: 7118 [2022-03-01 17:59:35,558 INFO L226 Difference]: Without dead ends: 7092 [2022-03-01 17:59:35,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:59:35,558 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 193 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:35,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 418 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1095 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2022-03-01 17:59:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2022-03-01 17:59:35,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 6773. [2022-03-01 17:59:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6773 states, 6772 states have (on average 4.4031305375073835) internal successors, (29818), 6772 states have internal predecessors, (29818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6773 states to 6773 states and 29818 transitions. [2022-03-01 17:59:35,692 INFO L78 Accepts]: Start accepts. Automaton has 6773 states and 29818 transitions. Word has length 23 [2022-03-01 17:59:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:35,693 INFO L470 AbstractCegarLoop]: Abstraction has 6773 states and 29818 transitions. [2022-03-01 17:59:35,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 6773 states and 29818 transitions. [2022-03-01 17:59:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:35,707 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:35,707 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:35,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Ended with exit code 0 [2022-03-01 17:59:35,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-03-01 17:59:35,908 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash -789121354, now seen corresponding path program 224 times [2022-03-01 17:59:35,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:35,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150144170] [2022-03-01 17:59:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:35,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:36,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:36,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150144170] [2022-03-01 17:59:36,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150144170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:36,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85848938] [2022-03-01 17:59:36,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:59:36,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:36,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:36,059 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:36,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-03-01 17:59:36,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:59:36,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:36,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:36,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:36,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:36,215 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 22 treesize of output 38 [2022-03-01 17:59:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:37,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:37,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:37,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:37,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:37,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:37,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85848938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:37,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:37,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:59:37,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104093701] [2022-03-01 17:59:37,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:37,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:59:37,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:37,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:59:37,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:59:37,709 INFO L87 Difference]: Start difference. First operand 6773 states and 29818 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:38,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:38,586 INFO L93 Difference]: Finished difference Result 7132 states and 31185 transitions. [2022-03-01 17:59:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:59:38,586 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:38,605 INFO L225 Difference]: With dead ends: 7132 [2022-03-01 17:59:38,605 INFO L226 Difference]: Without dead ends: 7104 [2022-03-01 17:59:38,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:59:38,605 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 185 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:38,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 550 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1518 Invalid, 0 Unknown, 75 Unchecked, 0.6s Time] [2022-03-01 17:59:38,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7104 states. [2022-03-01 17:59:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7104 to 6766. [2022-03-01 17:59:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6766 states, 6765 states have (on average 4.403695491500369) internal successors, (29791), 6765 states have internal predecessors, (29791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 29791 transitions. [2022-03-01 17:59:38,771 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 29791 transitions. Word has length 23 [2022-03-01 17:59:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:38,771 INFO L470 AbstractCegarLoop]: Abstraction has 6766 states and 29791 transitions. [2022-03-01 17:59:38,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 29791 transitions. [2022-03-01 17:59:38,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:38,784 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:38,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:38,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:38,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:38,984 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:38,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:38,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1674919634, now seen corresponding path program 225 times [2022-03-01 17:59:38,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:38,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208172898] [2022-03-01 17:59:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:38,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:39,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:39,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208172898] [2022-03-01 17:59:39,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208172898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:39,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797798515] [2022-03-01 17:59:39,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:59:39,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:39,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:39,101 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:39,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-03-01 17:59:39,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:59:39,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:39,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:39,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:39,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:39,279 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 22 treesize of output 38 [2022-03-01 17:59:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:39,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:39,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:39,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:39,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:39,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:39,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797798515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:39,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:39,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:59:39,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296898471] [2022-03-01 17:59:39,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:39,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:59:39,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:39,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:59:39,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:59:39,850 INFO L87 Difference]: Start difference. First operand 6766 states and 29791 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:40,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:40,701 INFO L93 Difference]: Finished difference Result 7245 states and 31626 transitions. [2022-03-01 17:59:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:59:40,701 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:40,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:40,719 INFO L225 Difference]: With dead ends: 7245 [2022-03-01 17:59:40,719 INFO L226 Difference]: Without dead ends: 7211 [2022-03-01 17:59:40,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:59:40,719 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 218 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:40,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 561 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1407 Invalid, 0 Unknown, 113 Unchecked, 0.5s Time] [2022-03-01 17:59:40,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7211 states. [2022-03-01 17:59:40,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7211 to 6765. [2022-03-01 17:59:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6765 states, 6764 states have (on average 4.4050857480780605) internal successors, (29796), 6764 states have internal predecessors, (29796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6765 states to 6765 states and 29796 transitions. [2022-03-01 17:59:40,882 INFO L78 Accepts]: Start accepts. Automaton has 6765 states and 29796 transitions. Word has length 23 [2022-03-01 17:59:40,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:40,882 INFO L470 AbstractCegarLoop]: Abstraction has 6765 states and 29796 transitions. [2022-03-01 17:59:40,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 6765 states and 29796 transitions. [2022-03-01 17:59:40,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:40,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:40,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:40,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Ended with exit code 0 [2022-03-01 17:59:41,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:41,096 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:41,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:41,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1859973916, now seen corresponding path program 226 times [2022-03-01 17:59:41,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:41,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073844058] [2022-03-01 17:59:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:41,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:41,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:41,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073844058] [2022-03-01 17:59:41,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073844058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:41,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956563598] [2022-03-01 17:59:41,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:59:41,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:41,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:41,226 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:41,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-03-01 17:59:41,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:59:41,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:41,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:59:41,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:41,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:41,366 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 25 treesize of output 41 [2022-03-01 17:59:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:41,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:41,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:41,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:41,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:41,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:41,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956563598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:41,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:41,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:59:41,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058725062] [2022-03-01 17:59:41,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:41,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:59:41,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:41,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:59:41,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:59:41,953 INFO L87 Difference]: Start difference. First operand 6765 states and 29796 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:42,704 INFO L93 Difference]: Finished difference Result 7052 states and 30873 transitions. [2022-03-01 17:59:42,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:59:42,704 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:42,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:42,721 INFO L225 Difference]: With dead ends: 7052 [2022-03-01 17:59:42,722 INFO L226 Difference]: Without dead ends: 7026 [2022-03-01 17:59:42,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:59:42,722 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 203 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:42,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 358 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 934 Invalid, 0 Unknown, 86 Unchecked, 0.4s Time] [2022-03-01 17:59:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7026 states. [2022-03-01 17:59:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7026 to 6774. [2022-03-01 17:59:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6774 states, 6773 states have (on average 4.403956887642108) internal successors, (29828), 6773 states have internal predecessors, (29828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6774 states to 6774 states and 29828 transitions. [2022-03-01 17:59:42,830 INFO L78 Accepts]: Start accepts. Automaton has 6774 states and 29828 transitions. Word has length 23 [2022-03-01 17:59:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:42,830 INFO L470 AbstractCegarLoop]: Abstraction has 6774 states and 29828 transitions. [2022-03-01 17:59:42,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 6774 states and 29828 transitions. [2022-03-01 17:59:42,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:42,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:42,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:42,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Ended with exit code 0 [2022-03-01 17:59:43,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2022-03-01 17:59:43,043 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:43,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:43,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1393417312, now seen corresponding path program 227 times [2022-03-01 17:59:43,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:43,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608410305] [2022-03-01 17:59:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:43,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:43,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:43,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608410305] [2022-03-01 17:59:43,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608410305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:43,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431496437] [2022-03-01 17:59:43,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:59:43,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:43,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:43,178 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:43,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-03-01 17:59:43,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:59:43,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:43,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:43,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:43,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:43,319 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 21 treesize of output 37 [2022-03-01 17:59:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:44,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:44,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:44,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:59:44,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:44,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:59:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:44,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431496437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:44,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:44,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:59:44,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843968500] [2022-03-01 17:59:44,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:44,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:59:44,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:44,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:59:44,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:59:44,343 INFO L87 Difference]: Start difference. First operand 6774 states and 29828 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:45,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:45,210 INFO L93 Difference]: Finished difference Result 7186 states and 31405 transitions. [2022-03-01 17:59:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:59:45,210 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:45,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:45,229 INFO L225 Difference]: With dead ends: 7186 [2022-03-01 17:59:45,229 INFO L226 Difference]: Without dead ends: 7158 [2022-03-01 17:59:45,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:59:45,230 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 308 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:45,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 349 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 930 Invalid, 0 Unknown, 51 Unchecked, 0.4s Time] [2022-03-01 17:59:45,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7158 states. [2022-03-01 17:59:45,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7158 to 6767. [2022-03-01 17:59:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6766 states have (on average 4.404966006503104) internal successors, (29804), 6766 states have internal predecessors, (29804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:45,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 29804 transitions. [2022-03-01 17:59:45,403 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 29804 transitions. Word has length 23 [2022-03-01 17:59:45,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:45,403 INFO L470 AbstractCegarLoop]: Abstraction has 6767 states and 29804 transitions. [2022-03-01 17:59:45,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 29804 transitions. [2022-03-01 17:59:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:45,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:45,415 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:45,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:45,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-03-01 17:59:45,616 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:45,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:45,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1106295960, now seen corresponding path program 228 times [2022-03-01 17:59:45,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:45,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140657927] [2022-03-01 17:59:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:45,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:45,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:45,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140657927] [2022-03-01 17:59:45,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140657927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:45,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242673464] [2022-03-01 17:59:45,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:45,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:45,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:45,744 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:45,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-03-01 17:59:45,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:59:45,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:45,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:59:45,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:45,858 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:59:45,858 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 27 treesize of output 51 [2022-03-01 17:59:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:46,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:46,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:59:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:46,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242673464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:46,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:46,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-03-01 17:59:46,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848637591] [2022-03-01 17:59:46,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:46,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:59:46,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:46,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:59:46,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:59:46,174 INFO L87 Difference]: Start difference. First operand 6767 states and 29804 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:47,354 INFO L93 Difference]: Finished difference Result 7738 states and 33611 transitions. [2022-03-01 17:59:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:59:47,354 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:59:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:47,373 INFO L225 Difference]: With dead ends: 7738 [2022-03-01 17:59:47,374 INFO L226 Difference]: Without dead ends: 7712 [2022-03-01 17:59:47,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=257, Invalid=1383, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:59:47,374 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 311 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:47,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 469 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:59:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7712 states. [2022-03-01 17:59:47,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7712 to 6791. [2022-03-01 17:59:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6791 states, 6790 states have (on average 4.407511045655376) internal successors, (29927), 6790 states have internal predecessors, (29927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:47,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6791 states to 6791 states and 29927 transitions. [2022-03-01 17:59:47,488 INFO L78 Accepts]: Start accepts. Automaton has 6791 states and 29927 transitions. Word has length 23 [2022-03-01 17:59:47,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:47,488 INFO L470 AbstractCegarLoop]: Abstraction has 6791 states and 29927 transitions. [2022-03-01 17:59:47,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:47,488 INFO L276 IsEmpty]: Start isEmpty. Operand 6791 states and 29927 transitions. [2022-03-01 17:59:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:59:47,500 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:47,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:47,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 Received shutdown request... [2022-03-01 17:59:47,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-03-01 17:59:47,700 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 17:59:47,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:47,700 INFO L85 PathProgramCache]: Analyzing trace with hash 613078574, now seen corresponding path program 229 times [2022-03-01 17:59:47,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:47,703 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2022-03-01 17:59:47,703 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [1194846293]. [2022-03-01 17:59:47,704 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 5 remaining) [2022-03-01 17:59:47,704 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (2 of 5 remaining) [2022-03-01 17:59:47,704 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (1 of 5 remaining) [2022-03-01 17:59:47,704 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION (0 of 5 remaining) [2022-03-01 17:59:47,706 INFO L732 BasicCegarLoop]: Path program histogram: [229, 52, 49, 6, 6, 1, 1, 1] [2022-03-01 17:59:47,707 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 17:59:47,708 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 17:59:47,709 INFO L202 PluginConnector]: Adding new model parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 05:59:47 BasicIcfg [2022-03-01 17:59:47,709 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 17:59:47,709 INFO L158 Benchmark]: Toolchain (without parser) took 787438.31ms. Allocated memory was 180.4MB in the beginning and 979.4MB in the end (delta: 799.0MB). Free memory was 138.5MB in the beginning and 399.3MB in the end (delta: -260.8MB). Peak memory consumption was 539.3MB. Max. memory is 8.0GB. [2022-03-01 17:59:47,709 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 180.4MB. Free memory is still 139.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 17:59:47,709 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.67ms. Allocated memory is still 180.4MB. Free memory was 138.4MB in the beginning and 137.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-01 17:59:47,709 INFO L158 Benchmark]: Boogie Preprocessor took 21.66ms. Allocated memory is still 180.4MB. Free memory was 136.9MB in the beginning and 136.0MB in the end (delta: 935.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 17:59:47,709 INFO L158 Benchmark]: RCFGBuilder took 231.22ms. Allocated memory is still 180.4MB. Free memory was 135.8MB in the beginning and 125.7MB in the end (delta: 10.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 17:59:47,709 INFO L158 Benchmark]: TraceAbstraction took 787163.54ms. Allocated memory was 180.4MB in the beginning and 979.4MB in the end (delta: 799.0MB). Free memory was 125.2MB in the beginning and 399.3MB in the end (delta: -274.1MB). Peak memory consumption was 525.7MB. Max. memory is 8.0GB. [2022-03-01 17:59:47,709 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### [2022-03-01 17:59:47,711 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 180.4MB. Free memory is still 139.7MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.67ms. Allocated memory is still 180.4MB. Free memory was 138.4MB in the beginning and 137.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.66ms. Allocated memory is still 180.4MB. Free memory was 136.9MB in the beginning and 136.0MB in the end (delta: 935.6kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 231.22ms. Allocated memory is still 180.4MB. Free memory was 135.8MB in the beginning and 125.7MB in the end (delta: 10.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 787163.54ms. Allocated memory was 180.4MB in the beginning and 979.4MB in the end (delta: 799.0MB). Free memory was 125.2MB in the beginning and 399.3MB in the end (delta: -274.1MB). Peak memory consumption was 525.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [1194846293]. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [1194846293]. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [1194846293]. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [1194846293]. - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [1194846293]. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 42 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 787.0s, OverallIterations: 345, TraceHistogramMax: 3, PathProgramHistogramMax: 229, EmptinessCheckTime: 3.1s, AutomataDifference: 380.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 74803 SdHoareTripleChecker+Valid, 179.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 74803 mSDsluCounter, 172718 SdHoareTripleChecker+Invalid, 149.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 43275 IncrementalHoareTripleChecker+Unchecked, 275407 mSDsCounter, 29603 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 422008 IncrementalHoareTripleChecker+Invalid, 494886 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 29603 mSolverCounterUnsat, 13305 mSDtfsCounter, 422008 mSolverCounterSat, 1.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24017 GetRequests, 9914 SyntacticMatches, 1151 SemanticMatches, 12952 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 134762 ImplicationChecksByTransitivity, 299.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6791occurred in iteration=344, InterpolantAutomatonStates: 10178, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 29.8s AutomataMinimizationTime, 344 MinimizatonAttempts, 211083 StatesRemovedByMinimization, 344 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 292.9s InterpolantComputationTime, 15565 NumberOfCodeBlocks, 15565 NumberOfCodeBlocksAsserted, 1109 NumberOfCheckSat, 22258 ConstructedInterpolants, 1936 QuantifiedInterpolants, 397952 SizeOfPredicates, 2733 NumberOfNonLiveVariables, 29785 ConjunctsInSsa, 10285 ConjunctsInUnsatCore, 1027 InterpolantComputations, 4 PerfectInterpolantSequences, 62/6362 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown