/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-15 14:11:56,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 14:11:56,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 14:11:56,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 14:11:56,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 14:11:56,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 14:11:56,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 14:11:56,988 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 [2022-02-15 14:11:57,011 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 14:11:57,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 14:11:57,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 14:11:57,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 14:11:57,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 14:11:57,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 14:11:57,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 14:11:57,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 14:11:57,013 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 14:11:57,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 14:11:57,014 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 14:11:57,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 14:11:57,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 14:11:57,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 14:11:57,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 14:11:57,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 14:11:57,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 14:11:57,015 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 14:11:57,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 14:11:57,015 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 14:11:57,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 14:11:57,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 14:11:57,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 14:11:57,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 14:11:57,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 14:11:57,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 14:11:57,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 14:11:57,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 14:11:57,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 14:11:57,016 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 14:11:57,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 14:11:57,016 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 14:11:57,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 14:11:57,016 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 14:11:57,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 14:11:57,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 14:11:57,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 14:11:57,200 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 14:11:57,201 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 14:11:57,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl [2022-02-15 14:11:57,202 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl' [2022-02-15 14:11:57,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 14:11:57,221 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 14:11:57,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 14:11:57,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 14:11:57,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 14:11:57,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:11:57" (1/1) ... [2022-02-15 14:11:57,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:11:57" (1/1) ... [2022-02-15 14:11:57,242 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 14:11:57,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 14:11:57,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 14:11:57,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 14:11:57,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 14:11:57,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:11:57" (1/1) ... [2022-02-15 14:11:57,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:11:57" (1/1) ... [2022-02-15 14:11:57,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:11:57" (1/1) ... [2022-02-15 14:11:57,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:11:57" (1/1) ... [2022-02-15 14:11:57,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:11:57" (1/1) ... [2022-02-15 14:11:57,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:11:57" (1/1) ... [2022-02-15 14:11:57,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:11:57" (1/1) ... [2022-02-15 14:11:57,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 14:11:57,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 14:11:57,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 14:11:57,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 14:11:57,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:11:57" (1/1) ... [2022-02-15 14:11:57,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 14:11:57,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:11:57,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 14:11:57,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 14:11:57,301 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-15 14:11:57,301 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-15 14:11:57,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-15 14:11:57,301 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-15 14:11:57,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-15 14:11:57,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-15 14:11:57,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 14:11:57,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 14:11:57,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 14:11:57,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-15 14:11:57,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-15 14:11:57,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-15 14:11:57,303 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-15 14:11:57,337 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 14:11:57,338 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 14:11:57,428 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 14:11:57,485 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 14:11:57,485 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-15 14:11:57,485 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-02-15 14:11:57,486 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-02-15 14:11:57,486 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-02-15 14:11:57,487 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:11:57 BoogieIcfgContainer [2022-02-15 14:11:57,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 14:11:57,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 14:11:57,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 14:11:57,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 14:11:57,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:11:57" (1/2) ... [2022-02-15 14:11:57,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2e1e60 and model type commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:11:57, skipping insertion in model container [2022-02-15 14:11:57,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:11:57" (2/2) ... [2022-02-15 14:11:57,507 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-1.wvr.bpl [2022-02-15 14:11:57,510 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 14:11:57,511 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 14:11:57,511 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 14:11:57,511 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 14:11:57,556 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-15 14:11:57,611 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 14:11:57,616 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-15 14:11:57,616 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-15 14:11:57,622 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 64 flow [2022-02-15 14:11:57,642 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:57,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 14:11:57,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:11:57,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:11:57,649 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:11:57,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:11:57,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1273620181, now seen corresponding path program 1 times [2022-02-15 14:11:57,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:11:57,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765672568] [2022-02-15 14:11:57,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:11:57,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:11:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:11:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:11:57,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:11:57,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765672568] [2022-02-15 14:11:57,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765672568] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:11:57,793 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:11:57,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-15 14:11:57,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403353252] [2022-02-15 14:11:57,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:11:57,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 14:11:57,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:11:57,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 14:11:57,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:11:57,817 INFO L87 Difference]: Start difference. First operand has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:11:57,845 INFO L93 Difference]: Finished difference Result 46 states and 118 transitions. [2022-02-15 14:11:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 14:11:57,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-15 14:11:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:11:57,853 INFO L225 Difference]: With dead ends: 46 [2022-02-15 14:11:57,853 INFO L226 Difference]: Without dead ends: 42 [2022-02-15 14:11:57,854 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 [2022-02-15 14:11:57,856 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:11:57,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:11:57,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-15 14:11:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-15 14:11:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:57,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 109 transitions. [2022-02-15 14:11:57,918 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 109 transitions. Word has length 12 [2022-02-15 14:11:57,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:11:57,918 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 109 transitions. [2022-02-15 14:11:57,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 109 transitions. [2022-02-15 14:11:57,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-15 14:11:57,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:11:57,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:11:57,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 14:11:57,923 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:11:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:11:57,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1869601381, now seen corresponding path program 1 times [2022-02-15 14:11:57,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:11:57,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842946295] [2022-02-15 14:11:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:11:57,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:11:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:11:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:11:57,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:11:57,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842946295] [2022-02-15 14:11:57,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842946295] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:11:57,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:11:57,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-15 14:11:57,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249960592] [2022-02-15 14:11:57,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:11:57,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 14:11:57,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:11:57,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 14:11:57,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:11:57,983 INFO L87 Difference]: Start difference. First operand 42 states and 109 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:58,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:11:58,003 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2022-02-15 14:11:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 14:11:58,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-15 14:11:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:11:58,005 INFO L225 Difference]: With dead ends: 59 [2022-02-15 14:11:58,005 INFO L226 Difference]: Without dead ends: 57 [2022-02-15 14:11:58,005 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 [2022-02-15 14:11:58,006 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:11:58,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 13 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:11:58,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-15 14:11:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2022-02-15 14:11:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 115 transitions. [2022-02-15 14:11:58,013 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 115 transitions. Word has length 13 [2022-02-15 14:11:58,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:11:58,013 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 115 transitions. [2022-02-15 14:11:58,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 115 transitions. [2022-02-15 14:11:58,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-15 14:11:58,014 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:11:58,014 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:11:58,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 14:11:58,014 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:11:58,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:11:58,015 INFO L85 PathProgramCache]: Analyzing trace with hash -868691015, now seen corresponding path program 1 times [2022-02-15 14:11:58,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:11:58,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093594020] [2022-02-15 14:11:58,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:11:58,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:11:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:11:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:11:58,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:11:58,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093594020] [2022-02-15 14:11:58,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093594020] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:11:58,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484958991] [2022-02-15 14:11:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:11:58,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:11:58,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:11:58,076 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:11:58,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-15 14:11:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:11:58,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-15 14:11:58,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:11:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:11:58,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:11:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:11:58,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484958991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:11:58,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:11:58,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-02-15 14:11:58,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508191943] [2022-02-15 14:11:58,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:11:58,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 14:11:58,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:11:58,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 14:11:58,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:11:58,342 INFO L87 Difference]: Start difference. First operand 46 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:11:58,378 INFO L93 Difference]: Finished difference Result 65 states and 168 transitions. [2022-02-15 14:11:58,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 14:11:58,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-15 14:11:58,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:11:58,381 INFO L225 Difference]: With dead ends: 65 [2022-02-15 14:11:58,381 INFO L226 Difference]: Without dead ends: 59 [2022-02-15 14:11:58,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:11:58,382 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:11:58,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:11:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-15 14:11:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2022-02-15 14:11:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.7115384615384617) internal successors, (141), 52 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 141 transitions. [2022-02-15 14:11:58,389 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 141 transitions. Word has length 13 [2022-02-15 14:11:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:11:58,389 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 141 transitions. [2022-02-15 14:11:58,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 141 transitions. [2022-02-15 14:11:58,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-15 14:11:58,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:11:58,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:11:58,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-15 14:11:58,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:11:58,591 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:11:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:11:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1742681769, now seen corresponding path program 1 times [2022-02-15 14:11:58,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:11:58,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512056681] [2022-02-15 14:11:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:11:58,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:11:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:11:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:11:58,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:11:58,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512056681] [2022-02-15 14:11:58,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512056681] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:11:58,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091547909] [2022-02-15 14:11:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:11:58,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:11:58,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:11:58,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:11:58,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-15 14:11:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:11:58,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-15 14:11:58,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:11:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:11:58,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:11:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:11:58,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091547909] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:11:58,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:11:58,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-02-15 14:11:58,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961209643] [2022-02-15 14:11:58,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:11:58,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 14:11:58,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:11:58,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 14:11:58,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:11:58,757 INFO L87 Difference]: Start difference. First operand 53 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:58,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:11:58,788 INFO L93 Difference]: Finished difference Result 68 states and 170 transitions. [2022-02-15 14:11:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 14:11:58,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-15 14:11:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:11:58,793 INFO L225 Difference]: With dead ends: 68 [2022-02-15 14:11:58,793 INFO L226 Difference]: Without dead ends: 49 [2022-02-15 14:11:58,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:11:58,795 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:11:58,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:11:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-15 14:11:58,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-02-15 14:11:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.625) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 126 transitions. [2022-02-15 14:11:58,811 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 126 transitions. Word has length 13 [2022-02-15 14:11:58,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:11:58,811 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 126 transitions. [2022-02-15 14:11:58,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 126 transitions. [2022-02-15 14:11:58,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 14:11:58,812 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:11:58,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:11:58,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-15 14:11:59,021 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,SelfDestructingSolverStorable3 [2022-02-15 14:11:59,021 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:11:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:11:59,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2010135383, now seen corresponding path program 1 times [2022-02-15 14:11:59,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:11:59,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531122067] [2022-02-15 14:11:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:11:59,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:11:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:11:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:11:59,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:11:59,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531122067] [2022-02-15 14:11:59,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531122067] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:11:59,048 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:11:59,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-15 14:11:59,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570486917] [2022-02-15 14:11:59,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:11:59,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 14:11:59,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:11:59,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 14:11:59,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:11:59,049 INFO L87 Difference]: Start difference. First operand 49 states and 126 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:59,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:11:59,061 INFO L93 Difference]: Finished difference Result 29 states and 63 transitions. [2022-02-15 14:11:59,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 14:11:59,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 14:11:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:11:59,062 INFO L225 Difference]: With dead ends: 29 [2022-02-15 14:11:59,062 INFO L226 Difference]: Without dead ends: 28 [2022-02-15 14:11:59,063 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 [2022-02-15 14:11:59,063 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:11:59,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:11:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-15 14:11:59,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-15 14:11:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 62 transitions. [2022-02-15 14:11:59,065 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 62 transitions. Word has length 14 [2022-02-15 14:11:59,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:11:59,065 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 62 transitions. [2022-02-15 14:11:59,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:59,066 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 62 transitions. [2022-02-15 14:11:59,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 14:11:59,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:11:59,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:11:59,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 14:11:59,066 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:11:59,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:11:59,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1770268941, now seen corresponding path program 1 times [2022-02-15 14:11:59,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:11:59,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341134461] [2022-02-15 14:11:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:11:59,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:11:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:11:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:11:59,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:11:59,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341134461] [2022-02-15 14:11:59,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341134461] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:11:59,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846631144] [2022-02-15 14:11:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:11:59,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:11:59,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:11:59,134 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:11:59,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-15 14:11:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:11:59,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 14:11:59,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:11:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:11:59,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:11:59,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-02-15 14:11:59,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:11:59,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 123 [2022-02-15 14:11:59,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:11:59,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 117 [2022-02-15 14:11:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:11:59,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846631144] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:11:59,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:11:59,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-02-15 14:11:59,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497924377] [2022-02-15 14:11:59,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:11:59,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 14:11:59,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:11:59,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 14:11:59,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:11:59,822 INFO L87 Difference]: Start difference. First operand 28 states and 62 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:59,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:11:59,915 INFO L93 Difference]: Finished difference Result 66 states and 164 transitions. [2022-02-15 14:11:59,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:11:59,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 14:11:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:11:59,916 INFO L225 Difference]: With dead ends: 66 [2022-02-15 14:11:59,916 INFO L226 Difference]: Without dead ends: 58 [2022-02-15 14:11:59,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-02-15 14:11:59,917 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:11:59,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 33 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:11:59,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-15 14:11:59,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2022-02-15 14:11:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.6458333333333335) internal successors, (127), 48 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 127 transitions. [2022-02-15 14:11:59,920 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 127 transitions. Word has length 14 [2022-02-15 14:11:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:11:59,920 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 127 transitions. [2022-02-15 14:11:59,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:11:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 127 transitions. [2022-02-15 14:11:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 14:11:59,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:11:59,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:11:59,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-15 14:12:00,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:00,132 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1806755371, now seen corresponding path program 1 times [2022-02-15 14:12:00,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:00,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125772363] [2022-02-15 14:12:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:00,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:12:00,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:00,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125772363] [2022-02-15 14:12:00,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125772363] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:12:00,174 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:12:00,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 14:12:00,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673655039] [2022-02-15 14:12:00,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:12:00,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 14:12:00,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:00,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 14:12:00,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-15 14:12:00,175 INFO L87 Difference]: Start difference. First operand 49 states and 127 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:00,190 INFO L93 Difference]: Finished difference Result 79 states and 190 transitions. [2022-02-15 14:12:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 14:12:00,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-15 14:12:00,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:00,191 INFO L225 Difference]: With dead ends: 79 [2022-02-15 14:12:00,191 INFO L226 Difference]: Without dead ends: 77 [2022-02-15 14:12:00,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-15 14:12:00,191 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:00,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:12:00,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-15 14:12:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2022-02-15 14:12:00,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.6551724137931036) internal successors, (154), 58 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 154 transitions. [2022-02-15 14:12:00,195 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 154 transitions. Word has length 15 [2022-02-15 14:12:00,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:00,195 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 154 transitions. [2022-02-15 14:12:00,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 154 transitions. [2022-02-15 14:12:00,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 14:12:00,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:00,195 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:00,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 14:12:00,196 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:00,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:00,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1885712219, now seen corresponding path program 2 times [2022-02-15 14:12:00,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:00,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826820107] [2022-02-15 14:12:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:00,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:00,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:00,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826820107] [2022-02-15 14:12:00,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826820107] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:00,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960866160] [2022-02-15 14:12:00,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:12:00,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:00,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:00,236 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:00,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-15 14:12:00,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:12:00,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:12:00,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:12:00,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:00,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:00,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 163 [2022-02-15 14:12:00,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:00,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 187 [2022-02-15 14:12:00,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:00,655 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 179 treesize of output 177 [2022-02-15 14:12:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:00,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960866160] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:00,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:00,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-02-15 14:12:00,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244493409] [2022-02-15 14:12:00,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:00,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 14:12:00,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:00,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 14:12:00,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-15 14:12:00,897 INFO L87 Difference]: Start difference. First operand 59 states and 154 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:00,981 INFO L93 Difference]: Finished difference Result 48 states and 107 transitions. [2022-02-15 14:12:00,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 14:12:00,981 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2022-02-15 14:12:00,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:00,982 INFO L225 Difference]: With dead ends: 48 [2022-02-15 14:12:00,982 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 14:12:00,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-02-15 14:12:00,982 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:00,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 48 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 3 Unchecked, 0.0s Time] [2022-02-15 14:12:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 14:12:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-02-15 14:12:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 106 transitions. [2022-02-15 14:12:00,985 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 106 transitions. Word has length 15 [2022-02-15 14:12:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:00,985 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 106 transitions. [2022-02-15 14:12:00,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:00,985 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 106 transitions. [2022-02-15 14:12:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 14:12:00,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:00,986 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:01,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-15 14:12:01,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:01,202 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:01,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:01,202 INFO L85 PathProgramCache]: Analyzing trace with hash -990818661, now seen corresponding path program 3 times [2022-02-15 14:12:01,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:01,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907869418] [2022-02-15 14:12:01,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:01,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:01,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:01,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907869418] [2022-02-15 14:12:01,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907869418] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:01,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936299827] [2022-02-15 14:12:01,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:12:01,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:01,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:01,253 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:01,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-15 14:12:01,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:12:01,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:12:01,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:12:01,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:01,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:01,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 163 [2022-02-15 14:12:01,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:01,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 183 [2022-02-15 14:12:01,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:01,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 177 [2022-02-15 14:12:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:01,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936299827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:01,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:01,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-02-15 14:12:01,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024985210] [2022-02-15 14:12:01,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:01,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 14:12:01,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:01,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 14:12:01,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-15 14:12:01,970 INFO L87 Difference]: Start difference. First operand 47 states and 106 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:02,061 INFO L93 Difference]: Finished difference Result 47 states and 101 transitions. [2022-02-15 14:12:02,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:12:02,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 15 [2022-02-15 14:12:02,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:02,063 INFO L225 Difference]: With dead ends: 47 [2022-02-15 14:12:02,063 INFO L226 Difference]: Without dead ends: 47 [2022-02-15 14:12:02,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-02-15 14:12:02,064 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:02,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 41 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 4 Unchecked, 0.0s Time] [2022-02-15 14:12:02,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-15 14:12:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-02-15 14:12:02,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 99 transitions. [2022-02-15 14:12:02,066 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 99 transitions. Word has length 15 [2022-02-15 14:12:02,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:02,067 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 99 transitions. [2022-02-15 14:12:02,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:02,067 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 99 transitions. [2022-02-15 14:12:02,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 14:12:02,067 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:02,067 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:02,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-15 14:12:02,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:02,284 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:02,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:02,284 INFO L85 PathProgramCache]: Analyzing trace with hash 901802395, now seen corresponding path program 4 times [2022-02-15 14:12:02,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:02,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319768031] [2022-02-15 14:12:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:02,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:02,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:02,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319768031] [2022-02-15 14:12:02,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319768031] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:02,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008168819] [2022-02-15 14:12:02,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:12:02,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:02,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:02,329 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:02,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-15 14:12:02,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:12:02,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:12:02,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 14:12:02,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:02,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:02,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 163 [2022-02-15 14:12:02,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:02,817 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 185 treesize of output 183 [2022-02-15 14:12:02,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:02,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 177 [2022-02-15 14:12:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:03,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008168819] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:03,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:03,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-02-15 14:12:03,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033090575] [2022-02-15 14:12:03,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:03,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 14:12:03,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:03,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 14:12:03,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 14:12:03,017 INFO L87 Difference]: Start difference. First operand 45 states and 99 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:03,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:03,092 INFO L93 Difference]: Finished difference Result 48 states and 100 transitions. [2022-02-15 14:12:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:12:03,093 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-15 14:12:03,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:03,093 INFO L225 Difference]: With dead ends: 48 [2022-02-15 14:12:03,094 INFO L226 Difference]: Without dead ends: 40 [2022-02-15 14:12:03,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-02-15 14:12:03,095 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:03,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 52 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 4 Unchecked, 0.0s Time] [2022-02-15 14:12:03,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-15 14:12:03,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-15 14:12:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 88 transitions. [2022-02-15 14:12:03,103 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 88 transitions. Word has length 15 [2022-02-15 14:12:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:03,103 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 88 transitions. [2022-02-15 14:12:03,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 88 transitions. [2022-02-15 14:12:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 14:12:03,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:03,104 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:03,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-15 14:12:03,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:03,319 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:03,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1705417717, now seen corresponding path program 2 times [2022-02-15 14:12:03,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:03,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868433452] [2022-02-15 14:12:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:03,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:12:03,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:03,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868433452] [2022-02-15 14:12:03,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868433452] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:03,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016139741] [2022-02-15 14:12:03,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:12:03,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:03,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:03,383 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:03,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-15 14:12:03,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:12:03,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:12:03,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 14:12:03,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:03,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:04,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:04,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 319 treesize of output 331 [2022-02-15 14:12:05,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:05,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 241 treesize of output 359 [2022-02-15 14:12:05,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:05,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 219 [2022-02-15 14:12:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:11,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016139741] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:11,953 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:11,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2022-02-15 14:12:11,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350178924] [2022-02-15 14:12:11,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:11,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 14:12:11,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:11,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 14:12:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-02-15 14:12:11,954 INFO L87 Difference]: Start difference. First operand 40 states and 88 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:12,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:12,044 INFO L93 Difference]: Finished difference Result 63 states and 157 transitions. [2022-02-15 14:12:12,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 14:12:12,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 14:12:12,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:12,045 INFO L225 Difference]: With dead ends: 63 [2022-02-15 14:12:12,045 INFO L226 Difference]: Without dead ends: 59 [2022-02-15 14:12:12,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-02-15 14:12:12,046 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:12,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 76 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-02-15 14:12:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-15 14:12:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2022-02-15 14:12:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.6153846153846154) internal successors, (136), 52 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 136 transitions. [2022-02-15 14:12:12,054 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 136 transitions. Word has length 16 [2022-02-15 14:12:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:12,056 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 136 transitions. [2022-02-15 14:12:12,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 136 transitions. [2022-02-15 14:12:12,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 14:12:12,059 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:12,059 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:12,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-15 14:12:12,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:12,275 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:12,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:12,275 INFO L85 PathProgramCache]: Analyzing trace with hash -836434205, now seen corresponding path program 3 times [2022-02-15 14:12:12,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:12,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358688498] [2022-02-15 14:12:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:12,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:12:12,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:12,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358688498] [2022-02-15 14:12:12,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358688498] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:12,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256706884] [2022-02-15 14:12:12,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:12:12,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:12,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:12,335 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:12,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-15 14:12:12,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:12:12,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:12:12,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 14:12:12,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:12,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:13,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:13,113 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 319 treesize of output 331 [2022-02-15 14:12:14,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:14,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 241 [2022-02-15 14:12:14,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:14,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 233 treesize of output 351 [2022-02-15 14:12:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:28,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256706884] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:28,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:28,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2022-02-15 14:12:28,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419222754] [2022-02-15 14:12:28,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:28,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 14:12:28,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:28,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 14:12:28,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-02-15 14:12:28,028 INFO L87 Difference]: Start difference. First operand 53 states and 136 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:28,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:28,159 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2022-02-15 14:12:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 14:12:28,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 14:12:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:28,160 INFO L225 Difference]: With dead ends: 75 [2022-02-15 14:12:28,160 INFO L226 Difference]: Without dead ends: 72 [2022-02-15 14:12:28,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-02-15 14:12:28,160 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:28,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 81 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-02-15 14:12:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-15 14:12:28,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2022-02-15 14:12:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.6) internal successors, (143), 55 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 143 transitions. [2022-02-15 14:12:28,166 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 143 transitions. Word has length 16 [2022-02-15 14:12:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:28,166 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 143 transitions. [2022-02-15 14:12:28,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 143 transitions. [2022-02-15 14:12:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 14:12:28,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:28,167 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:28,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-15 14:12:28,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-15 14:12:28,383 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:28,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash -896071091, now seen corresponding path program 5 times [2022-02-15 14:12:28,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:28,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720250645] [2022-02-15 14:12:28,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:28,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:28,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:28,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720250645] [2022-02-15 14:12:28,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720250645] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:28,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479428477] [2022-02-15 14:12:28,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:12:28,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:28,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:28,445 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:28,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-15 14:12:28,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:12:28,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:12:28,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 14:12:28,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:28,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:28,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:28,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 245 treesize of output 247 [2022-02-15 14:12:29,057 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-15 14:12:29,057 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 155 treesize of output 159 [2022-02-15 14:12:29,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:29,076 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 139 [2022-02-15 14:12:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:29,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479428477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:29,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:29,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 14 [2022-02-15 14:12:29,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211360252] [2022-02-15 14:12:29,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:29,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 14:12:29,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:29,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 14:12:29,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-02-15 14:12:29,339 INFO L87 Difference]: Start difference. First operand 56 states and 143 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:29,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:29,657 INFO L93 Difference]: Finished difference Result 132 states and 327 transitions. [2022-02-15 14:12:29,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 14:12:29,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 16 [2022-02-15 14:12:29,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:29,661 INFO L225 Difference]: With dead ends: 132 [2022-02-15 14:12:29,662 INFO L226 Difference]: Without dead ends: 114 [2022-02-15 14:12:29,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:12:29,663 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 85 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:29,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 135 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:12:29,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-15 14:12:29,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 58. [2022-02-15 14:12:29,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.789473684210526) internal successors, (159), 57 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 159 transitions. [2022-02-15 14:12:29,670 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 159 transitions. Word has length 16 [2022-02-15 14:12:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:29,670 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 159 transitions. [2022-02-15 14:12:29,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 159 transitions. [2022-02-15 14:12:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 14:12:29,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:29,671 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:29,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-15 14:12:29,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-15 14:12:29,875 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:29,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2116107927, now seen corresponding path program 4 times [2022-02-15 14:12:29,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:29,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322060910] [2022-02-15 14:12:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:29,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:12:29,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:29,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322060910] [2022-02-15 14:12:29,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322060910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:29,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674545282] [2022-02-15 14:12:29,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:12:29,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:29,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:29,967 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:29,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-15 14:12:29,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:12:29,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:12:29,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 14:12:29,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:12:30,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:30,587 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-15 14:12:30,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 369 treesize of output 345 [2022-02-15 14:12:30,604 INFO L353 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-02-15 14:12:30,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 345 treesize of output 336 [2022-02-15 14:12:30,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:30,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 329 [2022-02-15 14:12:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:12:31,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674545282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:31,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:31,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-02-15 14:12:31,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507093108] [2022-02-15 14:12:31,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:31,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 14:12:31,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:31,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 14:12:31,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-02-15 14:12:31,236 INFO L87 Difference]: Start difference. First operand 58 states and 159 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:31,631 INFO L93 Difference]: Finished difference Result 221 states and 606 transitions. [2022-02-15 14:12:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 14:12:31,632 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 14:12:31,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:31,633 INFO L225 Difference]: With dead ends: 221 [2022-02-15 14:12:31,633 INFO L226 Difference]: Without dead ends: 205 [2022-02-15 14:12:31,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:12:31,633 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:31,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 131 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 183 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-02-15 14:12:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-15 14:12:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 96. [2022-02-15 14:12:31,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 3.389473684210526) internal successors, (322), 95 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:31,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 322 transitions. [2022-02-15 14:12:31,636 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 322 transitions. Word has length 17 [2022-02-15 14:12:31,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:31,636 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 322 transitions. [2022-02-15 14:12:31,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:31,637 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 322 transitions. [2022-02-15 14:12:31,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 14:12:31,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:31,637 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:31,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-15 14:12:31,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-15 14:12:31,858 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:31,858 INFO L85 PathProgramCache]: Analyzing trace with hash -141190761, now seen corresponding path program 5 times [2022-02-15 14:12:31,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:31,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809207574] [2022-02-15 14:12:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:31,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:12:31,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:31,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809207574] [2022-02-15 14:12:31,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809207574] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:31,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316739902] [2022-02-15 14:12:31,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:12:31,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:31,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:31,943 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:31,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-15 14:12:31,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:12:31,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:12:31,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 14:12:31,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:32,198 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-15 14:12:32,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 108 [2022-02-15 14:12:32,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:32,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 98 [2022-02-15 14:12:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:32,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:32,629 INFO L353 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-02-15 14:12:32,629 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 228 treesize of output 233 [2022-02-15 14:12:32,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:32,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 151 [2022-02-15 14:12:32,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:32,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 141 [2022-02-15 14:12:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:33,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316739902] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:33,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:33,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-02-15 14:12:33,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800556788] [2022-02-15 14:12:33,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:33,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 14:12:33,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:33,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 14:12:33,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-02-15 14:12:33,162 INFO L87 Difference]: Start difference. First operand 96 states and 322 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:33,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:33,483 INFO L93 Difference]: Finished difference Result 247 states and 688 transitions. [2022-02-15 14:12:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 14:12:33,483 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 17 [2022-02-15 14:12:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:33,484 INFO L225 Difference]: With dead ends: 247 [2022-02-15 14:12:33,484 INFO L226 Difference]: Without dead ends: 237 [2022-02-15 14:12:33,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:12:33,485 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 154 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:33,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 111 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:12:33,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-02-15 14:12:33,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 94. [2022-02-15 14:12:33,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 3.4086021505376345) internal successors, (317), 93 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 317 transitions. [2022-02-15 14:12:33,488 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 317 transitions. Word has length 17 [2022-02-15 14:12:33,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:33,488 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 317 transitions. [2022-02-15 14:12:33,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:33,488 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 317 transitions. [2022-02-15 14:12:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 14:12:33,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:33,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:33,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-15 14:12:33,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-15 14:12:33,695 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash -536265831, now seen corresponding path program 6 times [2022-02-15 14:12:33,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:33,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782504833] [2022-02-15 14:12:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:33,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:33,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:33,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782504833] [2022-02-15 14:12:33,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782504833] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:33,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022715014] [2022-02-15 14:12:33,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:12:33,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:33,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:33,768 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:33,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-15 14:12:33,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:12:33,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:12:33,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 14:12:33,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:33,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-15 14:12:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:33,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:34,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:34,271 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 307 treesize of output 311 [2022-02-15 14:12:34,613 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:12:34,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 213 treesize of output 213 [2022-02-15 14:12:34,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:34,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 197 treesize of output 267 [2022-02-15 14:12:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:35,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022715014] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:35,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:35,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 14 [2022-02-15 14:12:35,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578420208] [2022-02-15 14:12:35,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:35,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 14:12:35,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:35,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 14:12:35,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-02-15 14:12:35,151 INFO L87 Difference]: Start difference. First operand 94 states and 317 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:35,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:35,199 INFO L93 Difference]: Finished difference Result 112 states and 334 transitions. [2022-02-15 14:12:35,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 14:12:35,199 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 17 [2022-02-15 14:12:35,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:35,200 INFO L225 Difference]: With dead ends: 112 [2022-02-15 14:12:35,200 INFO L226 Difference]: Without dead ends: 108 [2022-02-15 14:12:35,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-02-15 14:12:35,200 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:35,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 74 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2022-02-15 14:12:35,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-15 14:12:35,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 89. [2022-02-15 14:12:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 3.1136363636363638) internal successors, (274), 88 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 274 transitions. [2022-02-15 14:12:35,203 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 274 transitions. Word has length 17 [2022-02-15 14:12:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:35,203 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 274 transitions. [2022-02-15 14:12:35,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 274 transitions. [2022-02-15 14:12:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 14:12:35,203 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:35,203 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:35,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-15 14:12:35,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-15 14:12:35,420 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:35,420 INFO L85 PathProgramCache]: Analyzing trace with hash 882170585, now seen corresponding path program 7 times [2022-02-15 14:12:35,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:35,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296310815] [2022-02-15 14:12:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:35,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:35,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:35,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296310815] [2022-02-15 14:12:35,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296310815] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:35,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008931673] [2022-02-15 14:12:35,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:12:35,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:35,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:35,465 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:35,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-15 14:12:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 14:12:35,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:35,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-15 14:12:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:35,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:35,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:35,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 307 treesize of output 311 [2022-02-15 14:12:36,335 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:12:36,335 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 213 treesize of output 213 [2022-02-15 14:12:36,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:36,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 197 treesize of output 267 [2022-02-15 14:12:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:36,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008931673] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:36,980 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:36,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 13 [2022-02-15 14:12:36,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280000977] [2022-02-15 14:12:36,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:36,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 14:12:36,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:36,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 14:12:36,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-02-15 14:12:36,981 INFO L87 Difference]: Start difference. First operand 89 states and 274 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) [2022-02-15 14:12:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:37,029 INFO L93 Difference]: Finished difference Result 123 states and 354 transitions. [2022-02-15 14:12:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 14:12:37,029 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 17 [2022-02-15 14:12:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:37,030 INFO L225 Difference]: With dead ends: 123 [2022-02-15 14:12:37,030 INFO L226 Difference]: Without dead ends: 120 [2022-02-15 14:12:37,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-02-15 14:12:37,030 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:37,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 57 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2022-02-15 14:12:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-15 14:12:37,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2022-02-15 14:12:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 3.086021505376344) internal successors, (287), 93 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 287 transitions. [2022-02-15 14:12:37,033 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 287 transitions. Word has length 17 [2022-02-15 14:12:37,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:37,033 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 287 transitions. [2022-02-15 14:12:37,033 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) [2022-02-15 14:12:37,033 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 287 transitions. [2022-02-15 14:12:37,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 14:12:37,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:37,034 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:37,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-15 14:12:37,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-15 14:12:37,234 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:37,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:37,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1520175655, now seen corresponding path program 8 times [2022-02-15 14:12:37,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:37,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160647177] [2022-02-15 14:12:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:37,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:12:37,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:37,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160647177] [2022-02-15 14:12:37,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160647177] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:37,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444909271] [2022-02-15 14:12:37,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:12:37,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:37,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:37,281 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:37,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-15 14:12:37,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:12:37,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:12:37,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 14:12:37,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:37,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-15 14:12:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:12:37,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:37,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:37,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 307 treesize of output 311 [2022-02-15 14:12:38,188 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:12:38,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 213 treesize of output 213 [2022-02-15 14:12:38,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:38,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 197 treesize of output 267 [2022-02-15 14:12:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:12:38,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444909271] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:38,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:38,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 14 [2022-02-15 14:12:38,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946874588] [2022-02-15 14:12:38,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:38,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 14:12:38,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:38,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 14:12:38,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-02-15 14:12:38,608 INFO L87 Difference]: Start difference. First operand 94 states and 287 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:38,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:38,658 INFO L93 Difference]: Finished difference Result 123 states and 348 transitions. [2022-02-15 14:12:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 14:12:38,659 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 14:12:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:38,659 INFO L225 Difference]: With dead ends: 123 [2022-02-15 14:12:38,659 INFO L226 Difference]: Without dead ends: 114 [2022-02-15 14:12:38,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-02-15 14:12:38,660 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:38,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 67 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2022-02-15 14:12:38,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-15 14:12:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 90. [2022-02-15 14:12:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 3.0898876404494384) internal successors, (275), 89 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:38,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 275 transitions. [2022-02-15 14:12:38,663 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 275 transitions. Word has length 17 [2022-02-15 14:12:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:38,663 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 275 transitions. [2022-02-15 14:12:38,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 275 transitions. [2022-02-15 14:12:38,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 14:12:38,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:38,663 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:38,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-15 14:12:38,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:38,867 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:38,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:38,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1133665229, now seen corresponding path program 9 times [2022-02-15 14:12:38,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:38,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321599582] [2022-02-15 14:12:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:38,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:38,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:38,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321599582] [2022-02-15 14:12:38,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321599582] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:38,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154939925] [2022-02-15 14:12:38,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:12:38,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:38,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:38,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:38,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-15 14:12:38,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:12:38,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:12:38,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 14:12:38,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:39,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:40,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:40,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 405 treesize of output 525 [2022-02-15 14:12:44,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:44,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 257 [2022-02-15 14:12:44,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:44,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 249 treesize of output 243 [2022-02-15 14:12:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:45,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154939925] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:45,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:45,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-02-15 14:12:45,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840110837] [2022-02-15 14:12:45,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:45,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 14:12:45,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:45,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 14:12:45,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:12:45,311 INFO L87 Difference]: Start difference. First operand 90 states and 275 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:45,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:45,674 INFO L93 Difference]: Finished difference Result 98 states and 272 transitions. [2022-02-15 14:12:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 14:12:45,674 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 14:12:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:45,675 INFO L225 Difference]: With dead ends: 98 [2022-02-15 14:12:45,675 INFO L226 Difference]: Without dead ends: 93 [2022-02-15 14:12:45,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:12:45,676 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:45,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 117 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 123 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-02-15 14:12:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-15 14:12:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2022-02-15 14:12:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.963855421686747) internal successors, (246), 83 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 246 transitions. [2022-02-15 14:12:45,678 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 246 transitions. Word has length 18 [2022-02-15 14:12:45,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:45,678 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 246 transitions. [2022-02-15 14:12:45,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:45,678 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 246 transitions. [2022-02-15 14:12:45,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 14:12:45,678 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:45,679 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:45,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-15 14:12:45,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:45,895 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:45,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:45,896 INFO L85 PathProgramCache]: Analyzing trace with hash -66633963, now seen corresponding path program 10 times [2022-02-15 14:12:45,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:45,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741016695] [2022-02-15 14:12:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:45,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:46,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:46,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741016695] [2022-02-15 14:12:46,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741016695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:46,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090376507] [2022-02-15 14:12:46,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:12:46,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:46,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:46,047 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:46,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-15 14:12:46,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:12:46,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:12:46,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 14:12:46,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:12:46,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:47,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:47,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 409 treesize of output 409 [2022-02-15 14:12:47,239 INFO L353 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-02-15 14:12:47,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 401 treesize of output 361 [2022-02-15 14:12:47,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:47,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 361 treesize of output 361 [2022-02-15 14:12:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:12:47,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090376507] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:47,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:47,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-02-15 14:12:47,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233220309] [2022-02-15 14:12:47,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:47,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 14:12:47,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:47,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 14:12:47,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:12:47,814 INFO L87 Difference]: Start difference. First operand 84 states and 246 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:48,287 INFO L93 Difference]: Finished difference Result 194 states and 648 transitions. [2022-02-15 14:12:48,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 14:12:48,287 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 14:12:48,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:48,288 INFO L225 Difference]: With dead ends: 194 [2022-02-15 14:12:48,288 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 14:12:48,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:12:48,288 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 87 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:48,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 112 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 116 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-02-15 14:12:48,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 14:12:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 115. [2022-02-15 14:12:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 3.491228070175439) internal successors, (398), 114 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:48,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 398 transitions. [2022-02-15 14:12:48,292 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 398 transitions. Word has length 19 [2022-02-15 14:12:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:48,292 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 398 transitions. [2022-02-15 14:12:48,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:48,292 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 398 transitions. [2022-02-15 14:12:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 14:12:48,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:48,293 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:48,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-15 14:12:48,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:48,493 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:48,493 INFO L85 PathProgramCache]: Analyzing trace with hash 802349549, now seen corresponding path program 11 times [2022-02-15 14:12:48,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:48,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412673599] [2022-02-15 14:12:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:48,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:48,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:48,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412673599] [2022-02-15 14:12:48,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412673599] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:48,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216906347] [2022-02-15 14:12:48,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:12:48,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:48,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:48,623 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:48,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-15 14:12:48,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:12:48,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:12:48,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 14:12:48,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:48,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:49,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:49,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 409 treesize of output 409 [2022-02-15 14:12:50,360 INFO L353 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-02-15 14:12:50,360 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 299 treesize of output 273 [2022-02-15 14:12:50,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:50,368 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 265 treesize of output 261 [2022-02-15 14:12:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:50,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216906347] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:50,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:50,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 23 [2022-02-15 14:12:50,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606633129] [2022-02-15 14:12:50,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:50,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:12:50,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:50,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:12:50,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:12:50,974 INFO L87 Difference]: Start difference. First operand 115 states and 398 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:51,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:51,962 INFO L93 Difference]: Finished difference Result 464 states and 1342 transitions. [2022-02-15 14:12:51,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 14:12:51,963 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 [2022-02-15 14:12:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:51,966 INFO L225 Difference]: With dead ends: 464 [2022-02-15 14:12:51,966 INFO L226 Difference]: Without dead ends: 458 [2022-02-15 14:12:51,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 14:12:51,967 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 176 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:51,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 191 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 249 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2022-02-15 14:12:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-02-15 14:12:51,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 138. [2022-02-15 14:12:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.5985401459854014) internal successors, (493), 137 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 493 transitions. [2022-02-15 14:12:51,973 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 493 transitions. Word has length 19 [2022-02-15 14:12:51,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:51,974 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 493 transitions. [2022-02-15 14:12:51,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:51,975 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 493 transitions. [2022-02-15 14:12:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 14:12:51,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:51,976 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:51,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-15 14:12:52,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:52,179 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:52,180 INFO L85 PathProgramCache]: Analyzing trace with hash 742712663, now seen corresponding path program 12 times [2022-02-15 14:12:52,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:52,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125065684] [2022-02-15 14:12:52,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:52,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:52,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:52,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125065684] [2022-02-15 14:12:52,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125065684] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:52,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888593127] [2022-02-15 14:12:52,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:12:52,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:52,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:52,315 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:52,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-15 14:12:52,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 14:12:52,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:12:52,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 14:12:52,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:52,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:53,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:53,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 423 treesize of output 419 [2022-02-15 14:12:54,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:54,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 309 treesize of output 287 [2022-02-15 14:12:54,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:54,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 251 [2022-02-15 14:12:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:12:55,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888593127] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:12:55,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:12:55,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-02-15 14:12:55,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337592257] [2022-02-15 14:12:55,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:12:55,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:12:55,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:12:55,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:12:55,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:12:55,300 INFO L87 Difference]: Start difference. First operand 138 states and 493 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:57,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:12:57,532 INFO L93 Difference]: Finished difference Result 459 states and 1402 transitions. [2022-02-15 14:12:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 14:12:57,532 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 14:12:57,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:12:57,534 INFO L225 Difference]: With dead ends: 459 [2022-02-15 14:12:57,534 INFO L226 Difference]: Without dead ends: 437 [2022-02-15 14:12:57,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=355, Invalid=1285, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:12:57,534 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 213 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:12:57,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 323 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 422 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-02-15 14:12:57,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-02-15 14:12:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 204. [2022-02-15 14:12:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 3.8916256157635467) internal successors, (790), 203 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 790 transitions. [2022-02-15 14:12:57,541 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 790 transitions. Word has length 19 [2022-02-15 14:12:57,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:12:57,541 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 790 transitions. [2022-02-15 14:12:57,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:12:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 790 transitions. [2022-02-15 14:12:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 14:12:57,542 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:12:57,542 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:12:57,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-02-15 14:12:57,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:57,751 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:12:57,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:12:57,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1920923831, now seen corresponding path program 13 times [2022-02-15 14:12:57,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:12:57,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267832183] [2022-02-15 14:12:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:12:57,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:12:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:12:57,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:12:57,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267832183] [2022-02-15 14:12:57,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267832183] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:12:57,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983733890] [2022-02-15 14:12:57,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:12:57,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:12:57,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:12:57,830 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:12:57,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-15 14:12:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:12:57,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 14:12:57,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:12:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:12:58,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:12:59,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:12:59,570 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 389 treesize of output 387 [2022-02-15 14:13:00,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:13:00,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 295 treesize of output 585 [2022-02-15 14:13:00,919 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:13:00,919 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 265 treesize of output 263 [2022-02-15 14:13:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:13:29,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983733890] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:13:29,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:13:29,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 17 [2022-02-15 14:13:29,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543650744] [2022-02-15 14:13:29,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:13:29,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 14:13:29,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:13:29,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 14:13:29,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:13:29,758 INFO L87 Difference]: Start difference. First operand 204 states and 790 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:13:29,887 INFO L93 Difference]: Finished difference Result 218 states and 805 transitions. [2022-02-15 14:13:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 14:13:29,887 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 14:13:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:13:29,888 INFO L225 Difference]: With dead ends: 218 [2022-02-15 14:13:29,888 INFO L226 Difference]: Without dead ends: 214 [2022-02-15 14:13:29,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-02-15 14:13:29,889 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:13:29,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 110 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2022-02-15 14:13:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-15 14:13:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 197. [2022-02-15 14:13:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 3.8418367346938775) internal successors, (753), 196 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 753 transitions. [2022-02-15 14:13:29,893 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 753 transitions. Word has length 20 [2022-02-15 14:13:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:13:29,894 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 753 transitions. [2022-02-15 14:13:29,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:29,894 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 753 transitions. [2022-02-15 14:13:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 14:13:29,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:13:29,894 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:13:29,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-15 14:13:30,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:13:30,107 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:13:30,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:13:30,108 INFO L85 PathProgramCache]: Analyzing trace with hash 76701823, now seen corresponding path program 14 times [2022-02-15 14:13:30,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:13:30,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482082195] [2022-02-15 14:13:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:13:30,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:13:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:13:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:13:30,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:13:30,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482082195] [2022-02-15 14:13:30,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482082195] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:13:30,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643552394] [2022-02-15 14:13:30,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:13:30,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:13:30,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:13:30,167 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:13:30,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-15 14:13:30,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:13:30,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:13:30,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 14:13:30,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:13:30,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-15 14:13:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:13:30,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:13:31,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:13:31,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 393 treesize of output 395 [2022-02-15 14:13:32,152 INFO L353 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-02-15 14:13:32,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 287 treesize of output 272 [2022-02-15 14:13:32,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:13:32,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 261 treesize of output 531 [2022-02-15 14:13:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:13:34,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643552394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:13:34,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:13:34,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 18 [2022-02-15 14:13:34,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087901424] [2022-02-15 14:13:34,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:13:34,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:13:34,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:13:34,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:13:34,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:13:34,411 INFO L87 Difference]: Start difference. First operand 197 states and 753 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:13:34,698 INFO L93 Difference]: Finished difference Result 289 states and 1038 transitions. [2022-02-15 14:13:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 14:13:34,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 20 [2022-02-15 14:13:34,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:13:34,699 INFO L225 Difference]: With dead ends: 289 [2022-02-15 14:13:34,700 INFO L226 Difference]: Without dead ends: 283 [2022-02-15 14:13:34,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:13:34,700 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:13:34,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 124 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 62 Unchecked, 0.0s Time] [2022-02-15 14:13:34,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-15 14:13:34,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 232. [2022-02-15 14:13:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.8528138528138527) internal successors, (890), 231 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 890 transitions. [2022-02-15 14:13:34,706 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 890 transitions. Word has length 20 [2022-02-15 14:13:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:13:34,706 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 890 transitions. [2022-02-15 14:13:34,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 890 transitions. [2022-02-15 14:13:34,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 14:13:34,707 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:13:34,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:13:34,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-15 14:13:34,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-15 14:13:34,923 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:13:34,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:13:34,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1979431861, now seen corresponding path program 15 times [2022-02-15 14:13:34,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:13:34,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265718187] [2022-02-15 14:13:34,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:13:34,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:13:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:13:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:13:34,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:13:34,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265718187] [2022-02-15 14:13:34,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265718187] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:13:34,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231641814] [2022-02-15 14:13:34,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:13:34,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:13:34,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:13:34,995 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:13:34,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-15 14:13:35,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:13:35,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:13:35,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 14:13:35,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:13:35,182 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 7 treesize of output 3 [2022-02-15 14:13:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:13:35,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:13:36,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:13:36,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 309 treesize of output 311 [2022-02-15 14:13:36,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:13:36,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 201 treesize of output 199 [2022-02-15 14:13:36,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:13:36,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 191 treesize of output 261 [2022-02-15 14:13:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:13:37,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231641814] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:13:37,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:13:37,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-02-15 14:13:37,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033206054] [2022-02-15 14:13:37,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:13:37,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 14:13:37,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:13:37,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 14:13:37,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-02-15 14:13:37,243 INFO L87 Difference]: Start difference. First operand 232 states and 890 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:13:37,294 INFO L93 Difference]: Finished difference Result 233 states and 890 transitions. [2022-02-15 14:13:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:13:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 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 20 [2022-02-15 14:13:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:13:37,300 INFO L225 Difference]: With dead ends: 233 [2022-02-15 14:13:37,300 INFO L226 Difference]: Without dead ends: 228 [2022-02-15 14:13:37,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:13:37,300 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:13:37,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 79 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2022-02-15 14:13:37,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-15 14:13:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2022-02-15 14:13:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.8898678414096914) internal successors, (883), 227 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 883 transitions. [2022-02-15 14:13:37,306 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 883 transitions. Word has length 20 [2022-02-15 14:13:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:13:37,306 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 883 transitions. [2022-02-15 14:13:37,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:37,306 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 883 transitions. [2022-02-15 14:13:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:13:37,307 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:13:37,307 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:13:37,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-15 14:13:37,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-15 14:13:37,523 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:13:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:13:37,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1344522795, now seen corresponding path program 16 times [2022-02-15 14:13:37,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:13:37,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917980980] [2022-02-15 14:13:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:13:37,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:13:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:13:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:13:37,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:13:37,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917980980] [2022-02-15 14:13:37,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917980980] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:13:37,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035279421] [2022-02-15 14:13:37,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:13:37,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:13:37,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:13:37,639 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:13:37,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-15 14:13:37,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:13:37,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:13:37,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 14:13:37,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:13:37,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-15 14:13:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:13:38,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:13:40,059 INFO L353 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2022-02-15 14:13:40,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 509 treesize of output 501 [2022-02-15 14:13:40,078 INFO L353 Elim1Store]: treesize reduction 51, result has 16.4 percent of original size [2022-02-15 14:13:40,078 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 477 treesize of output 431 [2022-02-15 14:13:40,087 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-02-15 14:13:40,088 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 421 treesize of output 409 [2022-02-15 14:13:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:13:40,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035279421] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:13:40,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:13:40,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 26 [2022-02-15 14:13:40,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196345351] [2022-02-15 14:13:40,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:13:40,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:13:40,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:13:40,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:13:40,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:13:40,942 INFO L87 Difference]: Start difference. First operand 228 states and 883 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:48,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:13:48,615 INFO L93 Difference]: Finished difference Result 937 states and 2458 transitions. [2022-02-15 14:13:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 14:13:48,615 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:13:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:13:48,618 INFO L225 Difference]: With dead ends: 937 [2022-02-15 14:13:48,618 INFO L226 Difference]: Without dead ends: 840 [2022-02-15 14:13:48,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1058, Invalid=3102, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:13:48,619 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 655 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:13:48,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 707 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1084 Invalid, 0 Unknown, 98 Unchecked, 0.7s Time] [2022-02-15 14:13:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-02-15 14:13:48,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 246. [2022-02-15 14:13:48,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.8857142857142857) internal successors, (952), 245 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:48,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 952 transitions. [2022-02-15 14:13:48,629 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 952 transitions. Word has length 21 [2022-02-15 14:13:48,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:13:48,629 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 952 transitions. [2022-02-15 14:13:48,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:48,629 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 952 transitions. [2022-02-15 14:13:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:13:48,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:13:48,629 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:13:48,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-15 14:13:48,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-15 14:13:48,839 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:13:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:13:48,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2108660857, now seen corresponding path program 17 times [2022-02-15 14:13:48,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:13:48,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750872800] [2022-02-15 14:13:48,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:13:48,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:13:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:13:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:13:48,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:13:48,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750872800] [2022-02-15 14:13:48,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750872800] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:13:48,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137524357] [2022-02-15 14:13:48,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:13:48,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:13:48,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:13:49,000 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:13:49,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-15 14:13:49,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 14:13:49,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:13:49,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 14:13:49,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:13:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:13:49,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:13:51,535 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-02-15 14:13:51,535 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 623 treesize of output 607 [2022-02-15 14:13:52,144 INFO L353 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-02-15 14:13:52,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 497 treesize of output 455 [2022-02-15 14:13:52,157 INFO L353 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-02-15 14:13:52,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 447 treesize of output 423 [2022-02-15 14:13:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:13:52,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137524357] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:13:52,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:13:52,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 29 [2022-02-15 14:13:52,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829447853] [2022-02-15 14:13:52,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:13:52,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 14:13:52,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:13:52,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 14:13:52,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2022-02-15 14:13:52,807 INFO L87 Difference]: Start difference. First operand 246 states and 952 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:13:53,557 INFO L93 Difference]: Finished difference Result 391 states and 1288 transitions. [2022-02-15 14:13:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 14:13:53,557 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 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 21 [2022-02-15 14:13:53,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:13:53,558 INFO L225 Difference]: With dead ends: 391 [2022-02-15 14:13:53,559 INFO L226 Difference]: Without dead ends: 389 [2022-02-15 14:13:53,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=285, Invalid=975, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 14:13:53,559 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 126 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:13:53,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 247 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 310 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-02-15 14:13:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-02-15 14:13:53,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 219. [2022-02-15 14:13:53,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 4.009174311926605) internal successors, (874), 218 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:53,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 874 transitions. [2022-02-15 14:13:53,565 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 874 transitions. Word has length 21 [2022-02-15 14:13:53,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:13:53,565 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 874 transitions. [2022-02-15 14:13:53,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:53,565 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 874 transitions. [2022-02-15 14:13:53,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:13:53,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:13:53,565 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:13:53,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-15 14:13:53,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:13:53,781 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:13:53,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:13:53,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1641860777, now seen corresponding path program 18 times [2022-02-15 14:13:53,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:13:53,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482080035] [2022-02-15 14:13:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:13:53,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:13:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:13:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:13:53,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:13:53,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482080035] [2022-02-15 14:13:53,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482080035] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:13:53,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984396729] [2022-02-15 14:13:53,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:13:53,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:13:53,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:13:53,942 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:13:53,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-15 14:13:53,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 14:13:53,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:13:53,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 14:13:53,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:13:54,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-15 14:13:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:13:54,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:13:56,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:13:56,501 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 751 treesize of output 747 [2022-02-15 14:13:57,320 INFO L353 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-02-15 14:13:57,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 637 treesize of output 600 [2022-02-15 14:13:57,345 INFO L353 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-02-15 14:13:57,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 589 treesize of output 515 [2022-02-15 14:13:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:13:58,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984396729] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:13:58,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:13:58,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-02-15 14:13:58,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745028114] [2022-02-15 14:13:58,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:13:58,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 14:13:58,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:13:58,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 14:13:58,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2022-02-15 14:13:58,139 INFO L87 Difference]: Start difference. First operand 219 states and 874 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:59,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:13:59,890 INFO L93 Difference]: Finished difference Result 628 states and 2172 transitions. [2022-02-15 14:13:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 14:13:59,890 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 21 [2022-02-15 14:13:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:13:59,893 INFO L225 Difference]: With dead ends: 628 [2022-02-15 14:13:59,893 INFO L226 Difference]: Without dead ends: 612 [2022-02-15 14:13:59,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=452, Invalid=1108, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 14:13:59,894 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 277 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:13:59,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 207 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 353 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2022-02-15 14:13:59,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-02-15 14:13:59,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 330. [2022-02-15 14:13:59,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 4.258358662613982) internal successors, (1401), 329 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1401 transitions. [2022-02-15 14:13:59,902 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1401 transitions. Word has length 21 [2022-02-15 14:13:59,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:13:59,902 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 1401 transitions. [2022-02-15 14:13:59,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:13:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1401 transitions. [2022-02-15 14:13:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 14:13:59,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:13:59,903 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:13:59,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-15 14:14:00,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-15 14:14:00,119 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:14:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:14:00,119 INFO L85 PathProgramCache]: Analyzing trace with hash -421103539, now seen corresponding path program 19 times [2022-02-15 14:14:00,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:14:00,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971492416] [2022-02-15 14:14:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:14:00,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:14:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:14:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:14:00,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:14:00,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971492416] [2022-02-15 14:14:00,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971492416] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:14:00,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243331849] [2022-02-15 14:14:00,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:14:00,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:14:00,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:14:00,293 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:14:00,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-15 14:14:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:14:00,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 14:14:00,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:14:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:14:00,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:14:03,747 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-02-15 14:14:03,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 835 treesize of output 819 [2022-02-15 14:14:04,565 INFO L353 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2022-02-15 14:14:04,565 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 697 treesize of output 665 [2022-02-15 14:14:04,597 INFO L353 Elim1Store]: treesize reduction 22, result has 63.9 percent of original size [2022-02-15 14:14:04,598 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 649 treesize of output 573 [2022-02-15 14:14:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:14:08,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243331849] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:14:08,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:14:08,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-15 14:14:08,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404564151] [2022-02-15 14:14:08,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:14:08,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 14:14:08,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:14:08,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 14:14:08,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 14:14:08,499 INFO L87 Difference]: Start difference. First operand 330 states and 1401 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:14:10,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:14:10,914 INFO L93 Difference]: Finished difference Result 596 states and 2081 transitions. [2022-02-15 14:14:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 14:14:10,914 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 22 [2022-02-15 14:14:10,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:14:10,917 INFO L225 Difference]: With dead ends: 596 [2022-02-15 14:14:10,917 INFO L226 Difference]: Without dead ends: 578 [2022-02-15 14:14:10,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=386, Invalid=1506, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 14:14:10,917 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 291 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:14:10,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 291 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 475 Invalid, 0 Unknown, 26 Unchecked, 0.3s Time] [2022-02-15 14:14:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-02-15 14:14:10,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 367. [2022-02-15 14:14:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 4.2349726775956285) internal successors, (1550), 366 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:14:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1550 transitions. [2022-02-15 14:14:10,926 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1550 transitions. Word has length 22 [2022-02-15 14:14:10,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:14:10,926 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1550 transitions. [2022-02-15 14:14:10,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:14:10,926 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1550 transitions. [2022-02-15 14:14:10,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:14:10,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:14:10,927 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:14:10,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-15 14:14:11,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-15 14:14:11,135 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:14:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:14:11,135 INFO L85 PathProgramCache]: Analyzing trace with hash -210478889, now seen corresponding path program 20 times [2022-02-15 14:14:11,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:14:11,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185093424] [2022-02-15 14:14:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:14:11,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:14:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:14:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:14:11,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:14:11,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185093424] [2022-02-15 14:14:11,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185093424] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:14:11,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165337419] [2022-02-15 14:14:11,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:14:11,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:14:11,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:14:11,368 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:14:11,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-15 14:14:11,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:14:11,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:14:11,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-15 14:14:11,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:14:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:14:11,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:14:15,182 INFO L353 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2022-02-15 14:14:15,183 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 931 treesize of output 899 [2022-02-15 14:14:16,103 INFO L353 Elim1Store]: treesize reduction 22, result has 63.9 percent of original size [2022-02-15 14:14:16,104 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 761 treesize of output 653 [2022-02-15 14:14:16,118 INFO L353 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-02-15 14:14:16,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 615 treesize of output 575 [2022-02-15 14:14:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:14:19,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165337419] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:14:19,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:14:19,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2022-02-15 14:14:19,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443540049] [2022-02-15 14:14:19,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:14:19,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 14:14:19,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:14:19,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 14:14:19,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 14:14:19,065 INFO L87 Difference]: Start difference. First operand 367 states and 1550 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:14:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:14:25,281 INFO L93 Difference]: Finished difference Result 794 states and 2732 transitions. [2022-02-15 14:14:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:14:25,281 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 14:14:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:14:25,284 INFO L225 Difference]: With dead ends: 794 [2022-02-15 14:14:25,284 INFO L226 Difference]: Without dead ends: 772 [2022-02-15 14:14:25,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=657, Invalid=2535, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 14:14:25,285 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 551 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:14:25,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 426 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 652 Invalid, 0 Unknown, 24 Unchecked, 0.5s Time] [2022-02-15 14:14:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-02-15 14:14:25,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 452. [2022-02-15 14:14:25,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 4.261640798226164) internal successors, (1922), 451 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:14:25,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1922 transitions. [2022-02-15 14:14:25,296 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1922 transitions. Word has length 23 [2022-02-15 14:14:25,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:14:25,296 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1922 transitions. [2022-02-15 14:14:25,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:14:25,296 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1922 transitions. [2022-02-15 14:14:25,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 14:14:25,297 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:14:25,297 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:14:25,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-15 14:14:25,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:14:25,511 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:14:25,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:14:25,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1622325221, now seen corresponding path program 21 times [2022-02-15 14:14:25,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:14:25,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469639282] [2022-02-15 14:14:25,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:14:25,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:14:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:14:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:14:25,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:14:25,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469639282] [2022-02-15 14:14:25,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469639282] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:14:25,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593502697] [2022-02-15 14:14:25,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:14:25,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:14:25,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:14:25,630 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:14:25,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-15 14:14:25,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:14:25,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:14:25,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 14:14:25,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:14:26,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-15 14:14:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:14:26,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:14:28,198 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-02-15 14:14:28,198 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 437 treesize of output 429 [2022-02-15 14:14:28,651 INFO L353 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-02-15 14:14:28,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 299 treesize of output 287 [2022-02-15 14:14:29,880 INFO L353 Elim1Store]: treesize reduction 64, result has 91.1 percent of original size [2022-02-15 14:14:29,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 279 treesize of output 901 Received shutdown request... [2022-02-15 14:25:48,340 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-15 14:25:48,341 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-15 14:25:48,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-15 14:25:48,365 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-15 14:25:48,366 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-15 14:25:48,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:25:48,542 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 28ms.. [2022-02-15 14:25:48,543 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-15 14:25:48,543 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-15 14:25:48,543 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-15 14:25:48,545 INFO L732 BasicCegarLoop]: Path program histogram: [21, 5, 1, 1, 1, 1, 1] [2022-02-15 14:25:48,547 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-15 14:25:48,547 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 14:25:48,548 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 02:25:48 BasicIcfg [2022-02-15 14:25:48,549 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 14:25:48,549 INFO L158 Benchmark]: Toolchain (without parser) took 831328.13ms. Allocated memory was 176.2MB in the beginning and 715.1MB in the end (delta: 539.0MB). Free memory was 140.6MB in the beginning and 305.2MB in the end (delta: -164.6MB). Peak memory consumption was 436.9MB. Max. memory is 8.0GB. [2022-02-15 14:25:48,549 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 176.2MB. Free memory is still 141.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 14:25:48,549 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.74ms. Allocated memory is still 176.2MB. Free memory was 140.5MB in the beginning and 138.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 14:25:48,549 INFO L158 Benchmark]: Boogie Preprocessor took 11.50ms. Allocated memory is still 176.2MB. Free memory was 138.9MB in the beginning and 138.0MB in the end (delta: 959.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 14:25:48,549 INFO L158 Benchmark]: RCFGBuilder took 231.01ms. Allocated memory is still 176.2MB. Free memory was 137.8MB in the beginning and 124.9MB in the end (delta: 12.9MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-02-15 14:25:48,549 INFO L158 Benchmark]: TraceAbstraction took 831060.47ms. Allocated memory was 176.2MB in the beginning and 715.1MB in the end (delta: 539.0MB). Free memory was 124.3MB in the beginning and 305.2MB in the end (delta: -180.9MB). Peak memory consumption was 421.2MB. Max. memory is 8.0GB. [2022-02-15 14:25:48,550 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 176.2MB. Free memory is still 141.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.74ms. Allocated memory is still 176.2MB. Free memory was 140.5MB in the beginning and 138.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.50ms. Allocated memory is still 176.2MB. Free memory was 138.9MB in the beginning and 138.0MB in the end (delta: 959.3kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 231.01ms. Allocated memory is still 176.2MB. Free memory was 137.8MB in the beginning and 124.9MB in the end (delta: 12.9MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 831060.47ms. Allocated memory was 176.2MB in the beginning and 715.1MB in the end (delta: 539.0MB). Free memory was 124.3MB in the beginning and 305.2MB in the end (delta: -180.9MB). Peak memory consumption was 421.2MB. 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: 125]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 28ms.. - TimeoutResultAtElement [Line: 118]: 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 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 28ms.. - TimeoutResultAtElement [Line: 118]: 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 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 28ms.. - TimeoutResultAtElement [Line: 119]: 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 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 28ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 27 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 830.9s, OverallIterations: 31, TraceHistogramMax: 6, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 25.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3149 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3149 mSDsluCounter, 3922 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 610 IncrementalHoareTripleChecker+Unchecked, 6150 mSDsCounter, 715 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5148 IncrementalHoareTripleChecker+Invalid, 6473 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 715 mSolverCounterUnsat, 356 mSDtfsCounter, 5148 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1240 GetRequests, 642 SyntacticMatches, 1 SemanticMatches, 597 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4473 ImplicationChecksByTransitivity, 31.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=452occurred in iteration=30, InterpolantAutomatonStates: 401, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 30 MinimizatonAttempts, 2732 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 115.5s InterpolantComputationTime, 976 NumberOfCodeBlocks, 975 NumberOfCodeBlocksAsserted, 89 NumberOfCheckSat, 1355 ConstructedInterpolants, 93 QuantifiedInterpolants, 47792 SizeOfPredicates, 423 NumberOfNonLiveVariables, 1292 ConjunctsInSsa, 290 ConjunctsInUnsatCore, 82 InterpolantComputations, 4 PerfectInterpolantSequences, 208/846 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