/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/mult-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 15:27:19,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 15:27:19,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 15:27:19,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 15:27:19,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 15:27:19,532 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 15:27:19,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 15:27:19,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 15:27:19,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 15:27:19,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 15:27:19,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 15:27:19,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 15:27:19,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 15:27:19,534 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 15:27:19,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 15:27:19,534 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 15:27:19,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 15:27:19,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 15:27:19,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 15:27:19,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 15:27:19,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 15:27:19,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 15:27:19,535 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 15:27:19,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 15:27:19,535 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 15:27:19,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 15:27:19,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 15:27:19,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 15:27:19,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 15:27:19,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 15:27:19,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 15:27:19,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 15:27:19,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 15:27:19,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 15:27:19,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 15:27:19,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 15:27:19,537 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 15:27:19,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 15:27:19,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 15:27:19,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 15:27:19,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 15:27:19,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 15:27:19,745 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 15:27:19,748 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 15:27:19,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl [2022-03-15 15:27:19,749 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl' [2022-03-15 15:27:19,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 15:27:19,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 15:27:19,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 15:27:19,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 15:27:19,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 15:27:19,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:19" (1/1) ... [2022-03-15 15:27:19,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:19" (1/1) ... [2022-03-15 15:27:19,802 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 15:27:19,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 15:27:19,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 15:27:19,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 15:27:19,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 15:27:19,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:19" (1/1) ... [2022-03-15 15:27:19,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:19" (1/1) ... [2022-03-15 15:27:19,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:19" (1/1) ... [2022-03-15 15:27:19,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:19" (1/1) ... [2022-03-15 15:27:19,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:19" (1/1) ... [2022-03-15 15:27:19,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:19" (1/1) ... [2022-03-15 15:27:19,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:19" (1/1) ... [2022-03-15 15:27:19,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 15:27:19,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 15:27:19,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 15:27:19,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 15:27:19,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:19" (1/1) ... [2022-03-15 15:27:19,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 15:27:19,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:19,847 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 15:27:19,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 15:27:19,877 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 15:27:19,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 15:27:19,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 15:27:19,878 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 15:27:19,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 15:27:19,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 15:27:19,878 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 15:27:19,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 15:27:19,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 15:27:19,878 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 15:27:19,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 15:27:19,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 15:27:19,879 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 15:27:19,914 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 15:27:19,916 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 15:27:19,994 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 15:27:20,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 15:27:20,004 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 15:27:20,005 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 03:27:20 BoogieIcfgContainer [2022-03-15 15:27:20,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 15:27:20,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 15:27:20,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 15:27:20,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 15:27:20,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:19" (1/2) ... [2022-03-15 15:27:20,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d7c8a1 and model type mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 03:27:20, skipping insertion in model container [2022-03-15 15:27:20,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 03:27:20" (2/2) ... [2022-03-15 15:27:20,011 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.bpl [2022-03-15 15:27:20,014 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 15:27:20,014 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 15:27:20,014 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 15:27:20,014 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 15:27:20,056 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-15 15:27:20,085 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 15:27:20,090 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 15:27:20,090 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 15:27:20,097 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2022-03-15 15:27:20,130 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:20,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:20,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:20,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:20,147 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:20,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:20,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1698271758, now seen corresponding path program 1 times [2022-03-15 15:27:20,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:20,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540174886] [2022-03-15 15:27:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:20,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:20,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:20,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540174886] [2022-03-15 15:27:20,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540174886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:27:20,315 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:27:20,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 15:27:20,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084616691] [2022-03-15 15:27:20,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:27:20,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 15:27:20,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 15:27:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:27:20,340 INFO L87 Difference]: Start difference. First operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:20,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:20,375 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2022-03-15 15:27:20,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 15:27:20,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:20,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:20,394 INFO L225 Difference]: With dead ends: 214 [2022-03-15 15:27:20,394 INFO L226 Difference]: Without dead ends: 199 [2022-03-15 15:27:20,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:27:20,398 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:20,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:27:20,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-15 15:27:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2022-03-15 15:27:20,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:20,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2022-03-15 15:27:20,455 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2022-03-15 15:27:20,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:20,456 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2022-03-15 15:27:20,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:20,456 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2022-03-15 15:27:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:20,458 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:20,458 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:20,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 15:27:20,458 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:20,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:20,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1717700848, now seen corresponding path program 1 times [2022-03-15 15:27:20,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:20,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738686849] [2022-03-15 15:27:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:20,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:20,534 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:20,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738686849] [2022-03-15 15:27:20,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738686849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:20,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853246543] [2022-03-15 15:27:20,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:20,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:20,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:20,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:20,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 15:27:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:20,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 15:27:20,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:20,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:20,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853246543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:20,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:20,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-03-15 15:27:20,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041907474] [2022-03-15 15:27:20,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:20,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 15:27:20,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:20,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 15:27:20,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-15 15:27:20,721 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:20,879 INFO L93 Difference]: Finished difference Result 347 states and 967 transitions. [2022-03-15 15:27:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:27:20,879 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 17 [2022-03-15 15:27:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:20,886 INFO L225 Difference]: With dead ends: 347 [2022-03-15 15:27:20,886 INFO L226 Difference]: Without dead ends: 347 [2022-03-15 15:27:20,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:27:20,891 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:20,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 51 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-15 15:27:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 173. [2022-03-15 15:27:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.0) internal successors, (516), 172 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 516 transitions. [2022-03-15 15:27:20,909 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 516 transitions. Word has length 17 [2022-03-15 15:27:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:20,909 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 516 transitions. [2022-03-15 15:27:20,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 516 transitions. [2022-03-15 15:27:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:20,912 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:20,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:20,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 15:27:21,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:21,128 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:21,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1520327342, now seen corresponding path program 1 times [2022-03-15 15:27:21,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:21,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881522453] [2022-03-15 15:27:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:21,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:21,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:21,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881522453] [2022-03-15 15:27:21,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881522453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:27:21,168 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:27:21,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:27:21,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720101986] [2022-03-15 15:27:21,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:27:21,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:27:21,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:21,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:27:21,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:27:21,170 INFO L87 Difference]: Start difference. First operand 173 states and 516 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:21,260 INFO L93 Difference]: Finished difference Result 380 states and 1050 transitions. [2022-03-15 15:27:21,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:27:21,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:21,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:21,264 INFO L225 Difference]: With dead ends: 380 [2022-03-15 15:27:21,264 INFO L226 Difference]: Without dead ends: 380 [2022-03-15 15:27:21,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 15:27:21,266 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:21,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 36 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-15 15:27:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 156. [2022-03-15 15:27:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.935483870967742) internal successors, (455), 155 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 455 transitions. [2022-03-15 15:27:21,278 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 455 transitions. Word has length 17 [2022-03-15 15:27:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:21,278 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 455 transitions. [2022-03-15 15:27:21,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:21,278 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 455 transitions. [2022-03-15 15:27:21,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:21,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:21,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:21,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 15:27:21,279 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:21,280 INFO L85 PathProgramCache]: Analyzing trace with hash 388922220, now seen corresponding path program 1 times [2022-03-15 15:27:21,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:21,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980646512] [2022-03-15 15:27:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:21,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:21,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:21,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980646512] [2022-03-15 15:27:21,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980646512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:27:21,342 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:27:21,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:27:21,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500300577] [2022-03-15 15:27:21,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:27:21,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:27:21,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:27:21,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:27:21,343 INFO L87 Difference]: Start difference. First operand 156 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:21,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:21,509 INFO L93 Difference]: Finished difference Result 303 states and 809 transitions. [2022-03-15 15:27:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:27:21,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:21,511 INFO L225 Difference]: With dead ends: 303 [2022-03-15 15:27:21,511 INFO L226 Difference]: Without dead ends: 292 [2022-03-15 15:27:21,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-15 15:27:21,512 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:21,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 28 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-03-15 15:27:21,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 177. [2022-03-15 15:27:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.8806818181818183) internal successors, (507), 176 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 507 transitions. [2022-03-15 15:27:21,522 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 507 transitions. Word has length 17 [2022-03-15 15:27:21,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:21,522 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 507 transitions. [2022-03-15 15:27:21,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 507 transitions. [2022-03-15 15:27:21,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:21,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:21,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:21,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 15:27:21,524 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:21,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:21,525 INFO L85 PathProgramCache]: Analyzing trace with hash 336278568, now seen corresponding path program 2 times [2022-03-15 15:27:21,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:21,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781219053] [2022-03-15 15:27:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:21,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:21,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:21,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781219053] [2022-03-15 15:27:21,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781219053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:21,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894443014] [2022-03-15 15:27:21,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:21,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:21,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:21,599 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:21,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 15:27:21,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:21,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:21,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 15:27:21,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:21,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:21,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894443014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:21,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:21,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-03-15 15:27:21,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945270794] [2022-03-15 15:27:21,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:21,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:27:21,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:21,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:27:21,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:27:21,794 INFO L87 Difference]: Start difference. First operand 177 states and 507 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:22,146 INFO L93 Difference]: Finished difference Result 443 states and 1220 transitions. [2022-03-15 15:27:22,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:27:22,147 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:22,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:22,149 INFO L225 Difference]: With dead ends: 443 [2022-03-15 15:27:22,149 INFO L226 Difference]: Without dead ends: 443 [2022-03-15 15:27:22,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:27:22,150 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 159 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:22,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 105 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:22,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-03-15 15:27:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 187. [2022-03-15 15:27:22,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.935483870967742) internal successors, (546), 186 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 546 transitions. [2022-03-15 15:27:22,157 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 546 transitions. Word has length 17 [2022-03-15 15:27:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:22,158 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 546 transitions. [2022-03-15 15:27:22,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,158 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 546 transitions. [2022-03-15 15:27:22,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:22,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:22,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:22,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-15 15:27:22,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:22,375 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:22,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:22,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1075389144, now seen corresponding path program 2 times [2022-03-15 15:27:22,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:22,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908861964] [2022-03-15 15:27:22,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:22,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:22,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:22,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908861964] [2022-03-15 15:27:22,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908861964] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:27:22,403 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:27:22,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 15:27:22,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708544987] [2022-03-15 15:27:22,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:27:22,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 15:27:22,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:22,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 15:27:22,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:27:22,404 INFO L87 Difference]: Start difference. First operand 187 states and 546 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:22,449 INFO L93 Difference]: Finished difference Result 287 states and 800 transitions. [2022-03-15 15:27:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:27:22,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:22,451 INFO L225 Difference]: With dead ends: 287 [2022-03-15 15:27:22,451 INFO L226 Difference]: Without dead ends: 283 [2022-03-15 15:27:22,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:27:22,454 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:22,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 18 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:27:22,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-15 15:27:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 193. [2022-03-15 15:27:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.890625) internal successors, (555), 192 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 555 transitions. [2022-03-15 15:27:22,460 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 555 transitions. Word has length 17 [2022-03-15 15:27:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:22,460 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 555 transitions. [2022-03-15 15:27:22,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 555 transitions. [2022-03-15 15:27:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:22,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:22,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:22,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-15 15:27:22,461 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:22,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:22,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1208261484, now seen corresponding path program 3 times [2022-03-15 15:27:22,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:22,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982287762] [2022-03-15 15:27:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:22,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:22,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:22,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982287762] [2022-03-15 15:27:22,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982287762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:27:22,496 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:27:22,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:27:22,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292016505] [2022-03-15 15:27:22,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:27:22,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:27:22,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:22,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:27:22,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:27:22,496 INFO L87 Difference]: Start difference. First operand 193 states and 555 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:22,573 INFO L93 Difference]: Finished difference Result 255 states and 706 transitions. [2022-03-15 15:27:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:27:22,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:22,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:22,575 INFO L225 Difference]: With dead ends: 255 [2022-03-15 15:27:22,575 INFO L226 Difference]: Without dead ends: 244 [2022-03-15 15:27:22,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 15:27:22,576 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:22,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 26 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:22,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-15 15:27:22,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 196. [2022-03-15 15:27:22,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.876923076923077) internal successors, (561), 195 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 561 transitions. [2022-03-15 15:27:22,580 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 561 transitions. Word has length 17 [2022-03-15 15:27:22,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:22,581 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 561 transitions. [2022-03-15 15:27:22,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,581 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 561 transitions. [2022-03-15 15:27:22,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:22,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:22,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:22,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-15 15:27:22,581 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:22,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:22,582 INFO L85 PathProgramCache]: Analyzing trace with hash 830951980, now seen corresponding path program 4 times [2022-03-15 15:27:22,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:22,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614474634] [2022-03-15 15:27:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:22,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:22,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:22,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614474634] [2022-03-15 15:27:22,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614474634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:27:22,612 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:27:22,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:27:22,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834538542] [2022-03-15 15:27:22,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:27:22,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:27:22,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:27:22,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:27:22,613 INFO L87 Difference]: Start difference. First operand 196 states and 561 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:22,686 INFO L93 Difference]: Finished difference Result 247 states and 705 transitions. [2022-03-15 15:27:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:27:22,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:22,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:22,687 INFO L225 Difference]: With dead ends: 247 [2022-03-15 15:27:22,687 INFO L226 Difference]: Without dead ends: 247 [2022-03-15 15:27:22,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 15:27:22,688 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:22,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 31 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:22,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-15 15:27:22,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 199. [2022-03-15 15:27:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.8737373737373737) internal successors, (569), 198 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 569 transitions. [2022-03-15 15:27:22,693 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 569 transitions. Word has length 17 [2022-03-15 15:27:22,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:22,693 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 569 transitions. [2022-03-15 15:27:22,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 569 transitions. [2022-03-15 15:27:22,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:22,694 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:22,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:22,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-15 15:27:22,694 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:22,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:22,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1765137624, now seen corresponding path program 5 times [2022-03-15 15:27:22,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:22,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497044339] [2022-03-15 15:27:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:22,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:22,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:22,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497044339] [2022-03-15 15:27:22,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497044339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:27:22,729 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:27:22,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:27:22,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732181783] [2022-03-15 15:27:22,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:27:22,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 15:27:22,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:22,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 15:27:22,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:27:22,730 INFO L87 Difference]: Start difference. First operand 199 states and 569 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:22,814 INFO L93 Difference]: Finished difference Result 259 states and 737 transitions. [2022-03-15 15:27:22,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:27:22,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:22,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:22,816 INFO L225 Difference]: With dead ends: 259 [2022-03-15 15:27:22,816 INFO L226 Difference]: Without dead ends: 259 [2022-03-15 15:27:22,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-15 15:27:22,816 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:22,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 38 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:22,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-15 15:27:22,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 202. [2022-03-15 15:27:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8855721393034828) internal successors, (580), 201 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 580 transitions. [2022-03-15 15:27:22,835 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 580 transitions. Word has length 17 [2022-03-15 15:27:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:22,836 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 580 transitions. [2022-03-15 15:27:22,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 580 transitions. [2022-03-15 15:27:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:22,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:22,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:22,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-15 15:27:22,837 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:22,837 INFO L85 PathProgramCache]: Analyzing trace with hash -861155856, now seen corresponding path program 2 times [2022-03-15 15:27:22,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:22,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289519815] [2022-03-15 15:27:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:22,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:22,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:22,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289519815] [2022-03-15 15:27:22,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289519815] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:27:22,869 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:27:22,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 15:27:22,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737816969] [2022-03-15 15:27:22,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:27:22,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 15:27:22,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:22,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 15:27:22,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:27:22,870 INFO L87 Difference]: Start difference. First operand 202 states and 580 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:22,920 INFO L93 Difference]: Finished difference Result 263 states and 750 transitions. [2022-03-15 15:27:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:27:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:22,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:22,921 INFO L225 Difference]: With dead ends: 263 [2022-03-15 15:27:22,921 INFO L226 Difference]: Without dead ends: 255 [2022-03-15 15:27:22,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:27:22,922 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:22,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 16 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:27:22,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-15 15:27:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 192. [2022-03-15 15:27:22,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.884816753926702) internal successors, (551), 191 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 551 transitions. [2022-03-15 15:27:22,926 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 551 transitions. Word has length 17 [2022-03-15 15:27:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:22,927 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 551 transitions. [2022-03-15 15:27:22,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 551 transitions. [2022-03-15 15:27:22,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:22,927 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:22,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:22,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-15 15:27:22,928 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:22,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:22,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1480901912, now seen corresponding path program 6 times [2022-03-15 15:27:22,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:22,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578919809] [2022-03-15 15:27:22,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:22,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:22,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:22,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578919809] [2022-03-15 15:27:22,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578919809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:22,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500155035] [2022-03-15 15:27:22,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:27:22,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:22,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:22,982 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:22,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 15:27:23,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:27:23,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:23,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 15:27:23,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:23,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:23,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500155035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:23,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:23,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-03-15 15:27:23,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428069205] [2022-03-15 15:27:23,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:23,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:27:23,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:23,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:27:23,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:27:23,150 INFO L87 Difference]: Start difference. First operand 192 states and 551 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:23,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:23,330 INFO L93 Difference]: Finished difference Result 379 states and 1074 transitions. [2022-03-15 15:27:23,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:27:23,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:23,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:23,332 INFO L225 Difference]: With dead ends: 379 [2022-03-15 15:27:23,332 INFO L226 Difference]: Without dead ends: 379 [2022-03-15 15:27:23,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:27:23,333 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 135 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:23,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 65 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-03-15 15:27:23,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 186. [2022-03-15 15:27:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.854054054054054) internal successors, (528), 185 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 528 transitions. [2022-03-15 15:27:23,338 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 528 transitions. Word has length 17 [2022-03-15 15:27:23,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:23,338 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 528 transitions. [2022-03-15 15:27:23,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 528 transitions. [2022-03-15 15:27:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:23,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:23,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:23,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-15 15:27:23,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:23,555 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:23,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:23,556 INFO L85 PathProgramCache]: Analyzing trace with hash -444220188, now seen corresponding path program 7 times [2022-03-15 15:27:23,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:23,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179124916] [2022-03-15 15:27:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:23,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:23,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:23,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179124916] [2022-03-15 15:27:23,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179124916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:23,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487559529] [2022-03-15 15:27:23,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:27:23,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:23,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:23,594 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:23,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 15:27:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:23,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 15:27:23,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:23,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:23,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487559529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:23,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:23,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-03-15 15:27:23,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978166227] [2022-03-15 15:27:23,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:23,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:27:23,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:23,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:27:23,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:27:23,754 INFO L87 Difference]: Start difference. First operand 186 states and 528 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) [2022-03-15 15:27:23,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:23,985 INFO L93 Difference]: Finished difference Result 324 states and 942 transitions. [2022-03-15 15:27:23,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:27:23,986 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 17 [2022-03-15 15:27:23,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:23,987 INFO L225 Difference]: With dead ends: 324 [2022-03-15 15:27:23,987 INFO L226 Difference]: Without dead ends: 324 [2022-03-15 15:27:23,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:27:23,988 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:23,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 78 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-03-15 15:27:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 168. [2022-03-15 15:27:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.8862275449101795) internal successors, (482), 167 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:23,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 482 transitions. [2022-03-15 15:27:23,993 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 482 transitions. Word has length 17 [2022-03-15 15:27:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:23,993 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 482 transitions. [2022-03-15 15:27:23,993 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) [2022-03-15 15:27:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 482 transitions. [2022-03-15 15:27:23,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:27:23,993 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:23,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:24,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:24,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:24,210 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:24,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:24,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1880408526, now seen corresponding path program 1 times [2022-03-15 15:27:24,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:24,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501690432] [2022-03-15 15:27:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:24,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:24,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:24,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501690432] [2022-03-15 15:27:24,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501690432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:24,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006838908] [2022-03-15 15:27:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:24,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:24,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:24,272 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:24,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 15:27:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:24,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:27:24,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:24,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:24,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006838908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:24,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:24,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2022-03-15 15:27:24,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423308801] [2022-03-15 15:27:24,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:24,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 15:27:24,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:24,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 15:27:24,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-15 15:27:24,484 INFO L87 Difference]: Start difference. First operand 168 states and 482 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:24,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:24,534 INFO L93 Difference]: Finished difference Result 554 states and 1610 transitions. [2022-03-15 15:27:24,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:27:24,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:27:24,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:24,536 INFO L225 Difference]: With dead ends: 554 [2022-03-15 15:27:24,536 INFO L226 Difference]: Without dead ends: 524 [2022-03-15 15:27:24,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-15 15:27:24,537 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:24,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 110 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:27:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-03-15 15:27:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 301. [2022-03-15 15:27:24,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.06) internal successors, (918), 300 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 918 transitions. [2022-03-15 15:27:24,545 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 918 transitions. Word has length 19 [2022-03-15 15:27:24,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:24,545 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 918 transitions. [2022-03-15 15:27:24,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:24,546 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 918 transitions. [2022-03-15 15:27:24,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:27:24,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:24,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:24,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:24,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 15:27:24,764 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:24,765 INFO L85 PathProgramCache]: Analyzing trace with hash 280106304, now seen corresponding path program 2 times [2022-03-15 15:27:24,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:24,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124359530] [2022-03-15 15:27:24,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:24,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:24,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:24,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124359530] [2022-03-15 15:27:24,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124359530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:24,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574159983] [2022-03-15 15:27:24,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:24,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:24,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:24,848 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:24,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 15:27:24,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:24,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:24,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:27:24,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:24,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 15:27:25,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574159983] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:25,048 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 15:27:25,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2022-03-15 15:27:25,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910671652] [2022-03-15 15:27:25,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:27:25,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 15:27:25,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:25,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 15:27:25,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 15:27:25,049 INFO L87 Difference]: Start difference. First operand 301 states and 918 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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) [2022-03-15 15:27:25,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:25,073 INFO L93 Difference]: Finished difference Result 505 states and 1514 transitions. [2022-03-15 15:27:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 15:27:25,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:27:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:25,075 INFO L225 Difference]: With dead ends: 505 [2022-03-15 15:27:25,075 INFO L226 Difference]: Without dead ends: 490 [2022-03-15 15:27:25,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 15:27:25,076 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:25,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:27:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-03-15 15:27:25,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 415. [2022-03-15 15:27:25,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.152173913043478) internal successors, (1305), 414 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:25,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1305 transitions. [2022-03-15 15:27:25,085 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1305 transitions. Word has length 19 [2022-03-15 15:27:25,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:25,086 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1305 transitions. [2022-03-15 15:27:25,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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) [2022-03-15 15:27:25,086 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1305 transitions. [2022-03-15 15:27:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:25,087 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:25,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:25,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:25,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:25,304 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:25,305 INFO L85 PathProgramCache]: Analyzing trace with hash 679671728, now seen corresponding path program 3 times [2022-03-15 15:27:25,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:25,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348053132] [2022-03-15 15:27:25,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:25,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:25,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:25,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348053132] [2022-03-15 15:27:25,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348053132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:25,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760721365] [2022-03-15 15:27:25,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:27:25,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:25,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:25,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:25,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 15:27:25,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:27:25,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:25,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 15:27:25,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:25,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:25,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760721365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:25,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:25,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-03-15 15:27:25,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709662684] [2022-03-15 15:27:25,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:25,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:27:25,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:25,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:27:25,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:27:25,534 INFO L87 Difference]: Start difference. First operand 415 states and 1305 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:25,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:25,747 INFO L93 Difference]: Finished difference Result 1184 states and 3469 transitions. [2022-03-15 15:27:25,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:27:25,747 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:25,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:25,752 INFO L225 Difference]: With dead ends: 1184 [2022-03-15 15:27:25,752 INFO L226 Difference]: Without dead ends: 1184 [2022-03-15 15:27:25,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:27:25,753 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 165 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:25,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 104 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-03-15 15:27:25,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 547. [2022-03-15 15:27:25,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 3.2747252747252746) internal successors, (1788), 546 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1788 transitions. [2022-03-15 15:27:25,769 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1788 transitions. Word has length 21 [2022-03-15 15:27:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:25,769 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 1788 transitions. [2022-03-15 15:27:25,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1788 transitions. [2022-03-15 15:27:25,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:25,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:25,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:25,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:25,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:25,987 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:25,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1166690382, now seen corresponding path program 1 times [2022-03-15 15:27:25,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:25,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974264003] [2022-03-15 15:27:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:25,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:26,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:26,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974264003] [2022-03-15 15:27:26,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974264003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:26,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280997832] [2022-03-15 15:27:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:26,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:26,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:26,029 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:26,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 15:27:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 15:27:26,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:26,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:26,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280997832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:26,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:26,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-03-15 15:27:26,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798424914] [2022-03-15 15:27:26,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:26,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:27:26,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:26,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:27:26,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:27:26,225 INFO L87 Difference]: Start difference. First operand 547 states and 1788 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2022-03-15 15:27:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:26,598 INFO L93 Difference]: Finished difference Result 1383 states and 4228 transitions. [2022-03-15 15:27:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:27:26,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 21 [2022-03-15 15:27:26,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:26,604 INFO L225 Difference]: With dead ends: 1383 [2022-03-15 15:27:26,604 INFO L226 Difference]: Without dead ends: 1383 [2022-03-15 15:27:26,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:27:26,605 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 143 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:26,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 103 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2022-03-15 15:27:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 672. [2022-03-15 15:27:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.2801788375558867) internal successors, (2201), 671 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2201 transitions. [2022-03-15 15:27:26,622 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2201 transitions. Word has length 21 [2022-03-15 15:27:26,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:26,622 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 2201 transitions. [2022-03-15 15:27:26,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2022-03-15 15:27:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2201 transitions. [2022-03-15 15:27:26,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:26,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:26,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:26,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:26,835 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,SelfDestructingSolverStorable15 [2022-03-15 15:27:26,836 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:26,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:26,836 INFO L85 PathProgramCache]: Analyzing trace with hash -671302868, now seen corresponding path program 4 times [2022-03-15 15:27:26,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:26,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129283214] [2022-03-15 15:27:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:26,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:26,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:26,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129283214] [2022-03-15 15:27:26,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129283214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:26,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429495468] [2022-03-15 15:27:26,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:27:26,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:26,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:26,888 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:26,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 15:27:26,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:27:26,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:26,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:26,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:27,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:27,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429495468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:27,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:27,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-03-15 15:27:27,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305589762] [2022-03-15 15:27:27,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:27,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:27,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:27,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:27,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:27,122 INFO L87 Difference]: Start difference. First operand 672 states and 2201 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:27,734 INFO L93 Difference]: Finished difference Result 1750 states and 5112 transitions. [2022-03-15 15:27:27,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 15:27:27,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:27,741 INFO L225 Difference]: With dead ends: 1750 [2022-03-15 15:27:27,741 INFO L226 Difference]: Without dead ends: 1700 [2022-03-15 15:27:27,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=1285, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:27:27,741 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 360 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:27,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 158 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2022-03-15 15:27:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 740. [2022-03-15 15:27:27,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.277401894451962) internal successors, (2422), 739 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2422 transitions. [2022-03-15 15:27:27,763 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2422 transitions. Word has length 21 [2022-03-15 15:27:27,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:27,763 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2422 transitions. [2022-03-15 15:27:27,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:27,763 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2422 transitions. [2022-03-15 15:27:27,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:27,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:27,764 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:27,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:27,981 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,SelfDestructingSolverStorable16 [2022-03-15 15:27:27,981 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:27,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1344672536, now seen corresponding path program 5 times [2022-03-15 15:27:27,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:27,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033162989] [2022-03-15 15:27:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:27,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:28,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:28,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033162989] [2022-03-15 15:27:28,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033162989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:28,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10265394] [2022-03-15 15:27:28,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:27:28,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:28,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:28,037 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:28,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 15:27:28,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:27:28,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:28,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:28,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:28,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:28,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10265394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:28,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:28,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-03-15 15:27:28,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838485120] [2022-03-15 15:27:28,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:28,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:28,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:28,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:28,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:28,236 INFO L87 Difference]: Start difference. First operand 740 states and 2422 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:29,401 INFO L93 Difference]: Finished difference Result 2297 states and 6631 transitions. [2022-03-15 15:27:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 15:27:29,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:29,410 INFO L225 Difference]: With dead ends: 2297 [2022-03-15 15:27:29,410 INFO L226 Difference]: Without dead ends: 2297 [2022-03-15 15:27:29,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1009, Invalid=3023, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 15:27:29,412 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 374 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:29,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 208 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:29,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2022-03-15 15:27:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 756. [2022-03-15 15:27:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.282119205298013) internal successors, (2478), 755 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2478 transitions. [2022-03-15 15:27:29,443 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2478 transitions. Word has length 21 [2022-03-15 15:27:29,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:29,444 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 2478 transitions. [2022-03-15 15:27:29,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2478 transitions. [2022-03-15 15:27:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:29,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:29,447 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:29,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:29,663 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,SelfDestructingSolverStorable17 [2022-03-15 15:27:29,663 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:29,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:29,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1538627048, now seen corresponding path program 2 times [2022-03-15 15:27:29,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:29,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734942319] [2022-03-15 15:27:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:29,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:29,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734942319] [2022-03-15 15:27:29,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734942319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:29,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327819114] [2022-03-15 15:27:29,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:29,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:29,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:29,744 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:29,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 15:27:29,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:29,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:29,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 15:27:29,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:29,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:29,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327819114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:29,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:29,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-03-15 15:27:29,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595374169] [2022-03-15 15:27:29,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:29,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:27:29,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:29,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:27:29,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:27:29,917 INFO L87 Difference]: Start difference. First operand 756 states and 2478 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:30,482 INFO L93 Difference]: Finished difference Result 3028 states and 9113 transitions. [2022-03-15 15:27:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 15:27:30,483 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:30,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:30,495 INFO L225 Difference]: With dead ends: 3028 [2022-03-15 15:27:30,495 INFO L226 Difference]: Without dead ends: 3012 [2022-03-15 15:27:30,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=426, Invalid=1296, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:27:30,496 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 317 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:30,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 157 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:30,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2022-03-15 15:27:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 999. [2022-03-15 15:27:30,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 3.3887775551102206) internal successors, (3382), 998 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 3382 transitions. [2022-03-15 15:27:30,535 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 3382 transitions. Word has length 21 [2022-03-15 15:27:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:30,535 INFO L470 AbstractCegarLoop]: Abstraction has 999 states and 3382 transitions. [2022-03-15 15:27:30,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:30,535 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 3382 transitions. [2022-03-15 15:27:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:30,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:30,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:30,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:30,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:30,755 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1777782804, now seen corresponding path program 3 times [2022-03-15 15:27:30,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:30,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549577730] [2022-03-15 15:27:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:30,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:30,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549577730] [2022-03-15 15:27:30,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549577730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:30,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599126017] [2022-03-15 15:27:30,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:27:30,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:30,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:30,824 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:30,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 15:27:30,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:27:30,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:30,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 15:27:30,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:31,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:31,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599126017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:31,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:31,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-03-15 15:27:31,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447122201] [2022-03-15 15:27:31,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:31,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:27:31,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:31,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:27:31,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:27:31,047 INFO L87 Difference]: Start difference. First operand 999 states and 3382 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2022-03-15 15:27:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:31,599 INFO L93 Difference]: Finished difference Result 3180 states and 9617 transitions. [2022-03-15 15:27:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 15:27:31,600 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 21 [2022-03-15 15:27:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:31,613 INFO L225 Difference]: With dead ends: 3180 [2022-03-15 15:27:31,613 INFO L226 Difference]: Without dead ends: 3166 [2022-03-15 15:27:31,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:27:31,614 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 280 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:31,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 221 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2022-03-15 15:27:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 991. [2022-03-15 15:27:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.382828282828283) internal successors, (3349), 990 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3349 transitions. [2022-03-15 15:27:31,649 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3349 transitions. Word has length 21 [2022-03-15 15:27:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:31,649 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 3349 transitions. [2022-03-15 15:27:31,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2022-03-15 15:27:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3349 transitions. [2022-03-15 15:27:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:31,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:31,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:31,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:31,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:31,881 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:31,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:31,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1471548184, now seen corresponding path program 6 times [2022-03-15 15:27:31,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:31,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997398277] [2022-03-15 15:27:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:31,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:31,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:31,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997398277] [2022-03-15 15:27:31,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997398277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:31,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964001806] [2022-03-15 15:27:31,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:27:31,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:31,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:31,917 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:31,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 15:27:31,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:27:31,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:31,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:31,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:32,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:32,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964001806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:32,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:32,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-03-15 15:27:32,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541432917] [2022-03-15 15:27:32,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:32,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:32,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:32,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:32,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:32,170 INFO L87 Difference]: Start difference. First operand 991 states and 3349 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:32,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:32,710 INFO L93 Difference]: Finished difference Result 2213 states and 6556 transitions. [2022-03-15 15:27:32,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 15:27:32,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:32,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:32,721 INFO L225 Difference]: With dead ends: 2213 [2022-03-15 15:27:32,722 INFO L226 Difference]: Without dead ends: 2185 [2022-03-15 15:27:32,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=512, Invalid=1468, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 15:27:32,723 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 312 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:32,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 179 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2022-03-15 15:27:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 983. [2022-03-15 15:27:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 3.3716904276985744) internal successors, (3311), 982 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 3311 transitions. [2022-03-15 15:27:32,751 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 3311 transitions. Word has length 21 [2022-03-15 15:27:32,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:32,751 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 3311 transitions. [2022-03-15 15:27:32,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:32,751 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 3311 transitions. [2022-03-15 15:27:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:32,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:32,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:32,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:32,971 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,SelfDestructingSolverStorable20 [2022-03-15 15:27:32,972 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:32,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:32,972 INFO L85 PathProgramCache]: Analyzing trace with hash 734714668, now seen corresponding path program 7 times [2022-03-15 15:27:32,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:32,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728694907] [2022-03-15 15:27:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:32,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:33,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:33,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728694907] [2022-03-15 15:27:33,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728694907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:33,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122502913] [2022-03-15 15:27:33,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:27:33,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:33,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:33,007 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:33,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 15:27:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:33,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:33,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:33,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:33,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122502913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:33,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:33,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-03-15 15:27:33,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748218571] [2022-03-15 15:27:33,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:33,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:33,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:33,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:33,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:33,230 INFO L87 Difference]: Start difference. First operand 983 states and 3311 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:33,847 INFO L93 Difference]: Finished difference Result 2176 states and 6530 transitions. [2022-03-15 15:27:33,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 15:27:33,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:33,853 INFO L225 Difference]: With dead ends: 2176 [2022-03-15 15:27:33,853 INFO L226 Difference]: Without dead ends: 2126 [2022-03-15 15:27:33,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=1285, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:27:33,854 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 339 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:33,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 154 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2022-03-15 15:27:33,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1046. [2022-03-15 15:27:33,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 3.384688995215311) internal successors, (3537), 1045 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3537 transitions. [2022-03-15 15:27:33,892 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3537 transitions. Word has length 21 [2022-03-15 15:27:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:33,892 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 3537 transitions. [2022-03-15 15:27:33,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3537 transitions. [2022-03-15 15:27:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:33,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:33,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:33,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:34,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:34,116 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:34,116 INFO L85 PathProgramCache]: Analyzing trace with hash -548576280, now seen corresponding path program 8 times [2022-03-15 15:27:34,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:34,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533988290] [2022-03-15 15:27:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:34,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:34,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:34,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533988290] [2022-03-15 15:27:34,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533988290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:34,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786715683] [2022-03-15 15:27:34,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:34,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:34,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:34,156 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:34,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 15:27:34,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:34,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:34,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:34,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:34,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786715683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:34,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:34,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-03-15 15:27:34,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874828356] [2022-03-15 15:27:34,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:34,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:34,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:34,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:34,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:34,368 INFO L87 Difference]: Start difference. First operand 1046 states and 3537 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:35,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:35,108 INFO L93 Difference]: Finished difference Result 2322 states and 6923 transitions. [2022-03-15 15:27:35,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 15:27:35,108 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:35,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:35,114 INFO L225 Difference]: With dead ends: 2322 [2022-03-15 15:27:35,114 INFO L226 Difference]: Without dead ends: 2287 [2022-03-15 15:27:35,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=556, Invalid=1606, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 15:27:35,115 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 347 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:35,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 164 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:35,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2022-03-15 15:27:35,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1088. [2022-03-15 15:27:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.3679852805887767) internal successors, (3661), 1087 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3661 transitions. [2022-03-15 15:27:35,144 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3661 transitions. Word has length 21 [2022-03-15 15:27:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:35,144 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 3661 transitions. [2022-03-15 15:27:35,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3661 transitions. [2022-03-15 15:27:35,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:35,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:35,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:35,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:35,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:35,360 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:35,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:35,360 INFO L85 PathProgramCache]: Analyzing trace with hash 556018412, now seen corresponding path program 9 times [2022-03-15 15:27:35,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:35,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468262413] [2022-03-15 15:27:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:35,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:35,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:35,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468262413] [2022-03-15 15:27:35,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468262413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:35,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993321552] [2022-03-15 15:27:35,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:27:35,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:35,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:35,416 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:35,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 15:27:35,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:27:35,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:35,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:35,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:35,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993321552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:35,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:35,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-03-15 15:27:35,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159416470] [2022-03-15 15:27:35,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:35,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:35,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:35,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:35,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:35,663 INFO L87 Difference]: Start difference. First operand 1088 states and 3661 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2022-03-15 15:27:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:36,388 INFO L93 Difference]: Finished difference Result 2409 states and 7174 transitions. [2022-03-15 15:27:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 15:27:36,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 21 [2022-03-15 15:27:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:36,393 INFO L225 Difference]: With dead ends: 2409 [2022-03-15 15:27:36,393 INFO L226 Difference]: Without dead ends: 2409 [2022-03-15 15:27:36,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 15:27:36,395 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 308 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:36,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 229 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:36,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2022-03-15 15:27:36,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 1112. [2022-03-15 15:27:36,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.360936093609361) internal successors, (3734), 1111 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3734 transitions. [2022-03-15 15:27:36,418 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3734 transitions. Word has length 21 [2022-03-15 15:27:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:36,418 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3734 transitions. [2022-03-15 15:27:36,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2022-03-15 15:27:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3734 transitions. [2022-03-15 15:27:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:36,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:36,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:36,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:36,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-15 15:27:36,635 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:36,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1136089424, now seen corresponding path program 10 times [2022-03-15 15:27:36,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:36,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699093429] [2022-03-15 15:27:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:36,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:36,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:36,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699093429] [2022-03-15 15:27:36,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699093429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:36,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371132272] [2022-03-15 15:27:36,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:27:36,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:36,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:36,684 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:36,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 15:27:36,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:27:36,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:36,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 15:27:36,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:36,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:36,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371132272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:36,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:36,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-03-15 15:27:36,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093834989] [2022-03-15 15:27:36,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:36,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 15:27:36,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:36,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 15:27:36,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-15 15:27:36,815 INFO L87 Difference]: Start difference. First operand 1112 states and 3734 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:36,963 INFO L93 Difference]: Finished difference Result 1740 states and 5391 transitions. [2022-03-15 15:27:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:27:36,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 21 [2022-03-15 15:27:36,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:36,967 INFO L225 Difference]: With dead ends: 1740 [2022-03-15 15:27:36,967 INFO L226 Difference]: Without dead ends: 1732 [2022-03-15 15:27:36,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:27:36,967 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 107 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:36,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 72 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:36,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2022-03-15 15:27:36,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1128. [2022-03-15 15:27:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 3.345164152617569) internal successors, (3770), 1127 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:37,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 3770 transitions. [2022-03-15 15:27:37,004 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 3770 transitions. Word has length 21 [2022-03-15 15:27:37,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:37,005 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 3770 transitions. [2022-03-15 15:27:37,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:37,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 3770 transitions. [2022-03-15 15:27:37,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:37,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:37,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:37,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:37,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:37,224 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:37,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:37,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1273082712, now seen corresponding path program 11 times [2022-03-15 15:27:37,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:37,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11211449] [2022-03-15 15:27:37,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:37,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:37,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:37,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11211449] [2022-03-15 15:27:37,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11211449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:37,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225321250] [2022-03-15 15:27:37,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:27:37,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:37,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:37,275 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:37,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 15:27:37,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:27:37,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:37,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:37,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:37,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:37,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225321250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:37,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:37,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-03-15 15:27:37,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798436255] [2022-03-15 15:27:37,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:37,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:37,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:37,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:37,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:37,472 INFO L87 Difference]: Start difference. First operand 1128 states and 3770 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:38,407 INFO L93 Difference]: Finished difference Result 3058 states and 9441 transitions. [2022-03-15 15:27:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 15:27:38,407 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 21 [2022-03-15 15:27:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:38,414 INFO L225 Difference]: With dead ends: 3058 [2022-03-15 15:27:38,414 INFO L226 Difference]: Without dead ends: 3058 [2022-03-15 15:27:38,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=975, Invalid=2685, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 15:27:38,416 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 341 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:38,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 166 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:38,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2022-03-15 15:27:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 1235. [2022-03-15 15:27:38,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1234 states have (on average 3.4173419773095626) internal successors, (4217), 1234 states have internal predecessors, (4217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:38,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 4217 transitions. [2022-03-15 15:27:38,444 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 4217 transitions. Word has length 21 [2022-03-15 15:27:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:38,444 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 4217 transitions. [2022-03-15 15:27:38,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 4217 transitions. [2022-03-15 15:27:38,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:38,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:38,447 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:38,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:38,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:38,663 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:38,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash -236400988, now seen corresponding path program 12 times [2022-03-15 15:27:38,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:38,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277800013] [2022-03-15 15:27:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:38,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:38,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:38,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277800013] [2022-03-15 15:27:38,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277800013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:38,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059657313] [2022-03-15 15:27:38,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:27:38,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:38,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:38,725 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:38,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:27:38,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:38,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:38,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:38,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 15:27:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:38,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:38,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059657313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:38,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:38,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-03-15 15:27:38,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595989015] [2022-03-15 15:27:38,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:38,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:38,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:38,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:38,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:38,950 INFO L87 Difference]: Start difference. First operand 1235 states and 4217 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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) [2022-03-15 15:27:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:39,781 INFO L93 Difference]: Finished difference Result 2867 states and 8754 transitions. [2022-03-15 15:27:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 15:27:39,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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 21 [2022-03-15 15:27:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:39,788 INFO L225 Difference]: With dead ends: 2867 [2022-03-15 15:27:39,788 INFO L226 Difference]: Without dead ends: 2867 [2022-03-15 15:27:39,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=716, Invalid=1834, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 15:27:39,789 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 288 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:39,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 202 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:39,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2022-03-15 15:27:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 1238. [2022-03-15 15:27:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.4033953112368636) internal successors, (4210), 1237 states have internal predecessors, (4210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4210 transitions. [2022-03-15 15:27:39,818 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4210 transitions. Word has length 21 [2022-03-15 15:27:39,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:39,818 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 4210 transitions. [2022-03-15 15:27:39,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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) [2022-03-15 15:27:39,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4210 transitions. [2022-03-15 15:27:39,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:39,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:39,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:39,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:40,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:40,037 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:40,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:40,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1223951006, now seen corresponding path program 13 times [2022-03-15 15:27:40,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:40,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988952402] [2022-03-15 15:27:40,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:40,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:40,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:40,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988952402] [2022-03-15 15:27:40,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988952402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:40,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466199990] [2022-03-15 15:27:40,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:27:40,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:40,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:40,061 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:40,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 15:27:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:40,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 15:27:40,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:27:40,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:27:40,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466199990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:40,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:40,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-15 15:27:40,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64854985] [2022-03-15 15:27:40,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:40,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 15:27:40,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:40,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 15:27:40,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-15 15:27:40,199 INFO L87 Difference]: Start difference. First operand 1238 states and 4210 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:40,346 INFO L93 Difference]: Finished difference Result 2695 states and 8625 transitions. [2022-03-15 15:27:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:27:40,346 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:40,351 INFO L225 Difference]: With dead ends: 2695 [2022-03-15 15:27:40,351 INFO L226 Difference]: Without dead ends: 2695 [2022-03-15 15:27:40,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:27:40,352 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 122 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:40,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 74 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:40,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2022-03-15 15:27:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 1632. [2022-03-15 15:27:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.5113427345187) internal successors, (5727), 1631 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:40,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5727 transitions. [2022-03-15 15:27:40,385 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5727 transitions. Word has length 21 [2022-03-15 15:27:40,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:40,385 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 5727 transitions. [2022-03-15 15:27:40,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:40,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5727 transitions. [2022-03-15 15:27:40,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:40,388 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:40,388 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:40,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:40,603 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,SelfDestructingSolverStorable27 [2022-03-15 15:27:40,603 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:40,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1550959386, now seen corresponding path program 14 times [2022-03-15 15:27:40,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:40,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107748782] [2022-03-15 15:27:40,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:40,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:40,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:40,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107748782] [2022-03-15 15:27:40,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107748782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:40,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399279254] [2022-03-15 15:27:40,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:40,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:40,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:40,627 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:40,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 15:27:40,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:40,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:40,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 15:27:40,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:27:40,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:27:40,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399279254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:40,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:40,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-03-15 15:27:40,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059424959] [2022-03-15 15:27:40,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:40,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 15:27:40,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:40,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 15:27:40,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 15:27:40,761 INFO L87 Difference]: Start difference. First operand 1632 states and 5727 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:40,886 INFO L93 Difference]: Finished difference Result 2484 states and 8015 transitions. [2022-03-15 15:27:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:27:40,886 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:40,891 INFO L225 Difference]: With dead ends: 2484 [2022-03-15 15:27:40,891 INFO L226 Difference]: Without dead ends: 2476 [2022-03-15 15:27:40,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:27:40,896 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 155 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:40,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 46 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:40,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2022-03-15 15:27:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1632. [2022-03-15 15:27:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.505211526670754) internal successors, (5717), 1631 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5717 transitions. [2022-03-15 15:27:40,944 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5717 transitions. Word has length 21 [2022-03-15 15:27:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:40,944 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 5717 transitions. [2022-03-15 15:27:40,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5717 transitions. [2022-03-15 15:27:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:40,949 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:40,949 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:40,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:41,164 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,SelfDestructingSolverStorable28 [2022-03-15 15:27:41,164 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:41,164 INFO L85 PathProgramCache]: Analyzing trace with hash -67824448, now seen corresponding path program 15 times [2022-03-15 15:27:41,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:41,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923580480] [2022-03-15 15:27:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:41,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:41,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:41,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923580480] [2022-03-15 15:27:41,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923580480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:41,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344808764] [2022-03-15 15:27:41,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:27:41,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:41,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:41,207 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:41,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 15:27:41,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:27:41,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:41,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 15:27:41,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:41,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:41,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344808764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:41,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:41,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-15 15:27:41,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740474069] [2022-03-15 15:27:41,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:41,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 15:27:41,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 15:27:41,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-15 15:27:41,327 INFO L87 Difference]: Start difference. First operand 1632 states and 5717 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:41,477 INFO L93 Difference]: Finished difference Result 2462 states and 7934 transitions. [2022-03-15 15:27:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:27:41,477 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 21 [2022-03-15 15:27:41,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:41,482 INFO L225 Difference]: With dead ends: 2462 [2022-03-15 15:27:41,482 INFO L226 Difference]: Without dead ends: 2440 [2022-03-15 15:27:41,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:27:41,482 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:41,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 58 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:41,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2022-03-15 15:27:41,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1678. [2022-03-15 15:27:41,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.4806201550387597) internal successors, (5837), 1677 states have internal predecessors, (5837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:41,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 5837 transitions. [2022-03-15 15:27:41,525 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 5837 transitions. Word has length 21 [2022-03-15 15:27:41,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:41,525 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 5837 transitions. [2022-03-15 15:27:41,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:41,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 5837 transitions. [2022-03-15 15:27:41,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:41,528 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:41,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:41,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:41,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:41,744 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:41,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:41,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1112056286, now seen corresponding path program 16 times [2022-03-15 15:27:41,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:41,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177212745] [2022-03-15 15:27:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:41,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:41,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:41,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177212745] [2022-03-15 15:27:41,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177212745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:41,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006451813] [2022-03-15 15:27:41,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:27:41,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:41,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:41,795 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:41,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:27:41,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:41,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:41,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:41,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 15:27:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:41,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:27:42,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006451813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:42,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:42,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-03-15 15:27:42,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131684932] [2022-03-15 15:27:42,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:42,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:42,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:42,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:42,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:42,015 INFO L87 Difference]: Start difference. First operand 1678 states and 5837 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:42,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:42,837 INFO L93 Difference]: Finished difference Result 2987 states and 9432 transitions. [2022-03-15 15:27:42,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 15:27:42,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:42,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:42,842 INFO L225 Difference]: With dead ends: 2987 [2022-03-15 15:27:42,842 INFO L226 Difference]: Without dead ends: 2987 [2022-03-15 15:27:42,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:27:42,844 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 220 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:42,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 171 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2987 states. [2022-03-15 15:27:42,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2987 to 1697. [2022-03-15 15:27:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.4929245283018866) internal successors, (5924), 1696 states have internal predecessors, (5924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5924 transitions. [2022-03-15 15:27:42,900 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5924 transitions. Word has length 21 [2022-03-15 15:27:42,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:42,901 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 5924 transitions. [2022-03-15 15:27:42,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5924 transitions. [2022-03-15 15:27:42,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:42,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:42,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:42,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:43,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:43,120 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:43,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:43,120 INFO L85 PathProgramCache]: Analyzing trace with hash 985180638, now seen corresponding path program 17 times [2022-03-15 15:27:43,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:43,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123538189] [2022-03-15 15:27:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:43,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:43,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:43,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123538189] [2022-03-15 15:27:43,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123538189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:43,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405564791] [2022-03-15 15:27:43,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:27:43,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:43,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:43,169 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:43,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:43,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:43,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:43,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:43,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 15:27:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:43,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:27:43,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405564791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:43,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:43,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-03-15 15:27:43,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720543062] [2022-03-15 15:27:43,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:43,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:43,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:43,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:43,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:43,351 INFO L87 Difference]: Start difference. First operand 1697 states and 5924 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:43,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:43,875 INFO L93 Difference]: Finished difference Result 2545 states and 8132 transitions. [2022-03-15 15:27:43,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:27:43,875 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 21 [2022-03-15 15:27:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:43,880 INFO L225 Difference]: With dead ends: 2545 [2022-03-15 15:27:43,880 INFO L226 Difference]: Without dead ends: 2531 [2022-03-15 15:27:43,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:27:43,881 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 231 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:43,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 151 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2022-03-15 15:27:43,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 1697. [2022-03-15 15:27:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.490566037735849) internal successors, (5920), 1696 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:43,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5920 transitions. [2022-03-15 15:27:43,913 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5920 transitions. Word has length 21 [2022-03-15 15:27:43,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:43,914 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 5920 transitions. [2022-03-15 15:27:43,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:43,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5920 transitions. [2022-03-15 15:27:43,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:43,917 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:43,917 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:43,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:44,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:44,133 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:44,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:44,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2036430370, now seen corresponding path program 18 times [2022-03-15 15:27:44,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:44,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6325241] [2022-03-15 15:27:44,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:44,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:44,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:44,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6325241] [2022-03-15 15:27:44,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6325241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:44,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053847635] [2022-03-15 15:27:44,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:27:44,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:44,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:44,192 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:44,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 15:27:44,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:27:44,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:44,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:44,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:44,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:44,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053847635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:44,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:44,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-03-15 15:27:44,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951135964] [2022-03-15 15:27:44,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:44,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:44,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:44,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:44,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:44,391 INFO L87 Difference]: Start difference. First operand 1697 states and 5920 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:44,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:44,921 INFO L93 Difference]: Finished difference Result 2598 states and 8275 transitions. [2022-03-15 15:27:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:27:44,921 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 21 [2022-03-15 15:27:44,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:44,925 INFO L225 Difference]: With dead ends: 2598 [2022-03-15 15:27:44,925 INFO L226 Difference]: Without dead ends: 2584 [2022-03-15 15:27:44,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=1071, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:27:44,926 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 229 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:44,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 165 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:44,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-03-15 15:27:44,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1693. [2022-03-15 15:27:44,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 3.49290780141844) internal successors, (5910), 1692 states have internal predecessors, (5910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:44,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 5910 transitions. [2022-03-15 15:27:44,954 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 5910 transitions. Word has length 21 [2022-03-15 15:27:44,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:44,954 INFO L470 AbstractCegarLoop]: Abstraction has 1693 states and 5910 transitions. [2022-03-15 15:27:44,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:44,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 5910 transitions. [2022-03-15 15:27:44,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:44,957 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:44,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:44,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:45,170 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,SelfDestructingSolverStorable32 [2022-03-15 15:27:45,171 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:45,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:45,171 INFO L85 PathProgramCache]: Analyzing trace with hash -931835678, now seen corresponding path program 19 times [2022-03-15 15:27:45,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:45,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968642637] [2022-03-15 15:27:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:45,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:45,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:45,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968642637] [2022-03-15 15:27:45,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968642637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:45,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990084641] [2022-03-15 15:27:45,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:27:45,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:45,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:45,205 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:45,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 15:27:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:45,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:45,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:45,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:45,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990084641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:45,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:45,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-03-15 15:27:45,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593528567] [2022-03-15 15:27:45,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:45,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:45,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:45,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:45,347 INFO L87 Difference]: Start difference. First operand 1693 states and 5910 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:45,947 INFO L93 Difference]: Finished difference Result 2692 states and 8549 transitions. [2022-03-15 15:27:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 15:27:45,947 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:45,952 INFO L225 Difference]: With dead ends: 2692 [2022-03-15 15:27:45,952 INFO L226 Difference]: Without dead ends: 2680 [2022-03-15 15:27:45,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:27:45,953 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 194 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:45,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 188 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:45,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2022-03-15 15:27:45,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1684. [2022-03-15 15:27:45,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.4937611408199643) internal successors, (5880), 1683 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5880 transitions. [2022-03-15 15:27:45,981 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5880 transitions. Word has length 21 [2022-03-15 15:27:45,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:45,981 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 5880 transitions. [2022-03-15 15:27:45,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:45,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5880 transitions. [2022-03-15 15:27:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:45,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:45,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:46,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:46,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-15 15:27:46,199 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:46,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1942186098, now seen corresponding path program 1 times [2022-03-15 15:27:46,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:46,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260135851] [2022-03-15 15:27:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:46,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:46,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:46,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260135851] [2022-03-15 15:27:46,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260135851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:46,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975916964] [2022-03-15 15:27:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:46,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:46,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:46,236 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:46,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 15:27:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:46,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:46,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:46,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:46,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975916964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:46,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:46,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-03-15 15:27:46,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918991627] [2022-03-15 15:27:46,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:46,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:46,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:46,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:46,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:46,426 INFO L87 Difference]: Start difference. First operand 1684 states and 5880 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:46,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:46,836 INFO L93 Difference]: Finished difference Result 2346 states and 7504 transitions. [2022-03-15 15:27:46,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:27:46,836 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 21 [2022-03-15 15:27:46,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:46,840 INFO L225 Difference]: With dead ends: 2346 [2022-03-15 15:27:46,840 INFO L226 Difference]: Without dead ends: 2346 [2022-03-15 15:27:46,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:27:46,841 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 183 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:46,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 170 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:46,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2022-03-15 15:27:46,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1738. [2022-03-15 15:27:46,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 3.482440990213011) internal successors, (6049), 1737 states have internal predecessors, (6049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 6049 transitions. [2022-03-15 15:27:46,866 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 6049 transitions. Word has length 21 [2022-03-15 15:27:46,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:46,866 INFO L470 AbstractCegarLoop]: Abstraction has 1738 states and 6049 transitions. [2022-03-15 15:27:46,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 6049 transitions. [2022-03-15 15:27:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:46,886 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:46,886 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:46,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:47,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-15 15:27:47,102 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:47,103 INFO L85 PathProgramCache]: Analyzing trace with hash 57074606, now seen corresponding path program 2 times [2022-03-15 15:27:47,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:47,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890619976] [2022-03-15 15:27:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:47,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:47,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:47,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890619976] [2022-03-15 15:27:47,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890619976] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:47,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217738921] [2022-03-15 15:27:47,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:47,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:47,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:47,137 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:47,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 15:27:47,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:47,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:47,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 15:27:47,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:47,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:47,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217738921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:47,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:47,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-03-15 15:27:47,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522823157] [2022-03-15 15:27:47,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:47,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 15:27:47,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:47,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 15:27:47,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-15 15:27:47,241 INFO L87 Difference]: Start difference. First operand 1738 states and 6049 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:47,394 INFO L93 Difference]: Finished difference Result 3182 states and 10482 transitions. [2022-03-15 15:27:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:27:47,394 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:47,400 INFO L225 Difference]: With dead ends: 3182 [2022-03-15 15:27:47,400 INFO L226 Difference]: Without dead ends: 3170 [2022-03-15 15:27:47,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:27:47,401 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 200 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:47,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 53 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2022-03-15 15:27:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 1964. [2022-03-15 15:27:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.5252165053489555) internal successors, (6920), 1963 states have internal predecessors, (6920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 6920 transitions. [2022-03-15 15:27:47,445 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 6920 transitions. Word has length 21 [2022-03-15 15:27:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:47,445 INFO L470 AbstractCegarLoop]: Abstraction has 1964 states and 6920 transitions. [2022-03-15 15:27:47,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 6920 transitions. [2022-03-15 15:27:47,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:47,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:47,449 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:47,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:47,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:47,665 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:47,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:47,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1957334190, now seen corresponding path program 3 times [2022-03-15 15:27:47,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:47,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877113658] [2022-03-15 15:27:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:47,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:27:47,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:47,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877113658] [2022-03-15 15:27:47,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877113658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:47,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399857236] [2022-03-15 15:27:47,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:27:47,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:47,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:47,698 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:47,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 15:27:47,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:27:47,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:47,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 15:27:47,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:27:47,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:27:47,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399857236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:47,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:47,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-15 15:27:47,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206007475] [2022-03-15 15:27:47,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:47,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 15:27:47,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:47,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 15:27:47,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-15 15:27:47,831 INFO L87 Difference]: Start difference. First operand 1964 states and 6920 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:47,998 INFO L93 Difference]: Finished difference Result 3443 states and 11289 transitions. [2022-03-15 15:27:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:27:47,999 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 21 [2022-03-15 15:27:47,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:48,006 INFO L225 Difference]: With dead ends: 3443 [2022-03-15 15:27:48,006 INFO L226 Difference]: Without dead ends: 3443 [2022-03-15 15:27:48,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:27:48,006 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 155 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:48,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 68 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3443 states. [2022-03-15 15:27:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3443 to 1967. [2022-03-15 15:27:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.51881993896236) internal successors, (6918), 1966 states have internal predecessors, (6918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6918 transitions. [2022-03-15 15:27:48,050 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6918 transitions. Word has length 21 [2022-03-15 15:27:48,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:48,050 INFO L470 AbstractCegarLoop]: Abstraction has 1967 states and 6918 transitions. [2022-03-15 15:27:48,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6918 transitions. [2022-03-15 15:27:48,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:48,054 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:48,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:48,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:48,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 15:27:48,270 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:48,270 INFO L85 PathProgramCache]: Analyzing trace with hash -2031398486, now seen corresponding path program 4 times [2022-03-15 15:27:48,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:48,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463369294] [2022-03-15 15:27:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:48,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:27:48,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:48,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463369294] [2022-03-15 15:27:48,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463369294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:48,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069601761] [2022-03-15 15:27:48,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:27:48,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:48,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:48,312 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:48,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 15:27:48,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:27:48,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:48,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:48,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:48,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:27:48,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069601761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:48,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:48,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 11 [2022-03-15 15:27:48,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098072319] [2022-03-15 15:27:48,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:48,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:27:48,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:48,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:27:48,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:27:48,497 INFO L87 Difference]: Start difference. First operand 1967 states and 6918 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2022-03-15 15:27:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:48,828 INFO L93 Difference]: Finished difference Result 2329 states and 7790 transitions. [2022-03-15 15:27:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:27:48,828 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 21 [2022-03-15 15:27:48,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:48,833 INFO L225 Difference]: With dead ends: 2329 [2022-03-15 15:27:48,833 INFO L226 Difference]: Without dead ends: 2315 [2022-03-15 15:27:48,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:27:48,834 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 120 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:48,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 153 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:48,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-03-15 15:27:48,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1967. [2022-03-15 15:27:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.517802644964395) internal successors, (6916), 1966 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:48,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6916 transitions. [2022-03-15 15:27:48,868 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6916 transitions. Word has length 21 [2022-03-15 15:27:48,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:48,869 INFO L470 AbstractCegarLoop]: Abstraction has 1967 states and 6916 transitions. [2022-03-15 15:27:48,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2022-03-15 15:27:48,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6916 transitions. [2022-03-15 15:27:48,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:48,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:48,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:48,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:49,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-15 15:27:49,095 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:49,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:49,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1038218894, now seen corresponding path program 5 times [2022-03-15 15:27:49,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:49,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006892841] [2022-03-15 15:27:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:49,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:49,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:49,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006892841] [2022-03-15 15:27:49,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006892841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:49,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59311016] [2022-03-15 15:27:49,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:27:49,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:49,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:49,152 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:49,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 15:27:49,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:27:49,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:49,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 15:27:49,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:49,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:49,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59311016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:49,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:49,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-15 15:27:49,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240494026] [2022-03-15 15:27:49,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:49,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:27:49,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:49,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:27:49,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:27:49,279 INFO L87 Difference]: Start difference. First operand 1967 states and 6916 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) [2022-03-15 15:27:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:49,435 INFO L93 Difference]: Finished difference Result 3606 states and 11938 transitions. [2022-03-15 15:27:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:27:49,435 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 21 [2022-03-15 15:27:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:49,441 INFO L225 Difference]: With dead ends: 3606 [2022-03-15 15:27:49,442 INFO L226 Difference]: Without dead ends: 3599 [2022-03-15 15:27:49,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:27:49,442 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 163 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:49,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 88 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:49,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3599 states. [2022-03-15 15:27:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3599 to 2189. [2022-03-15 15:27:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 3.537934186471664) internal successors, (7741), 2188 states have internal predecessors, (7741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:49,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 7741 transitions. [2022-03-15 15:27:49,485 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 7741 transitions. Word has length 21 [2022-03-15 15:27:49,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:49,485 INFO L470 AbstractCegarLoop]: Abstraction has 2189 states and 7741 transitions. [2022-03-15 15:27:49,485 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) [2022-03-15 15:27:49,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 7741 transitions. [2022-03-15 15:27:49,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:49,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:49,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:49,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:49,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 15:27:49,704 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:49,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:49,704 INFO L85 PathProgramCache]: Analyzing trace with hash -487787106, now seen corresponding path program 6 times [2022-03-15 15:27:49,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:49,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386569280] [2022-03-15 15:27:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:49,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:49,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:49,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386569280] [2022-03-15 15:27:49,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386569280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:49,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434091633] [2022-03-15 15:27:49,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:27:49,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:49,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:49,744 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:49,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 15:27:49,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:27:49,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:49,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:49,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:49,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:49,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434091633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:49,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:49,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-03-15 15:27:49,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122431137] [2022-03-15 15:27:49,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:49,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:49,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:49,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:49,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:49,949 INFO L87 Difference]: Start difference. First operand 2189 states and 7741 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2022-03-15 15:27:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:50,294 INFO L93 Difference]: Finished difference Result 2810 states and 9248 transitions. [2022-03-15 15:27:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:27:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 21 [2022-03-15 15:27:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:50,299 INFO L225 Difference]: With dead ends: 2810 [2022-03-15 15:27:50,299 INFO L226 Difference]: Without dead ends: 2764 [2022-03-15 15:27:50,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:27:50,315 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 164 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:50,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 168 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2022-03-15 15:27:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2248. [2022-03-15 15:27:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 3.51935914552737) internal successors, (7908), 2247 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 7908 transitions. [2022-03-15 15:27:50,368 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 7908 transitions. Word has length 21 [2022-03-15 15:27:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:50,368 INFO L470 AbstractCegarLoop]: Abstraction has 2248 states and 7908 transitions. [2022-03-15 15:27:50,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2022-03-15 15:27:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 7908 transitions. [2022-03-15 15:27:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:50,372 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:50,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:50,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:50,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 15:27:50,588 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:50,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:50,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1640366058, now seen corresponding path program 4 times [2022-03-15 15:27:50,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:50,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299809101] [2022-03-15 15:27:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:50,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:50,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:50,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299809101] [2022-03-15 15:27:50,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299809101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:50,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29987984] [2022-03-15 15:27:50,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:27:50,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:50,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:50,650 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:50,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 15:27:50,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:27:50,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:50,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 15:27:50,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:50,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:50,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29987984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:50,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:50,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-03-15 15:27:50,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454206816] [2022-03-15 15:27:50,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:50,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:27:50,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:50,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:27:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:27:50,794 INFO L87 Difference]: Start difference. First operand 2248 states and 7908 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:51,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:51,160 INFO L93 Difference]: Finished difference Result 3344 states and 11103 transitions. [2022-03-15 15:27:51,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:27:51,160 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:51,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:51,166 INFO L225 Difference]: With dead ends: 3344 [2022-03-15 15:27:51,166 INFO L226 Difference]: Without dead ends: 3330 [2022-03-15 15:27:51,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:27:51,167 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 171 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:51,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 127 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2022-03-15 15:27:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2210. [2022-03-15 15:27:51,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2209 states have (on average 3.5224083295608875) internal successors, (7781), 2209 states have internal predecessors, (7781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 7781 transitions. [2022-03-15 15:27:51,223 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 7781 transitions. Word has length 21 [2022-03-15 15:27:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:51,223 INFO L470 AbstractCegarLoop]: Abstraction has 2210 states and 7781 transitions. [2022-03-15 15:27:51,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 7781 transitions. [2022-03-15 15:27:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:51,227 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:51,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:51,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-15 15:27:51,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-15 15:27:51,442 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:51,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1138059314, now seen corresponding path program 5 times [2022-03-15 15:27:51,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:51,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055647872] [2022-03-15 15:27:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:51,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:51,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:51,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055647872] [2022-03-15 15:27:51,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055647872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:51,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909390292] [2022-03-15 15:27:51,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:27:51,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:51,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:51,495 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:51,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 15:27:51,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:27:51,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:51,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 15:27:51,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:51,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:51,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909390292] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:51,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:51,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-03-15 15:27:51,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197633614] [2022-03-15 15:27:51,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:51,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:27:51,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:51,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:27:51,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:27:51,696 INFO L87 Difference]: Start difference. First operand 2210 states and 7781 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:52,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:52,691 INFO L93 Difference]: Finished difference Result 6661 states and 21393 transitions. [2022-03-15 15:27:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 15:27:52,691 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:52,707 INFO L225 Difference]: With dead ends: 6661 [2022-03-15 15:27:52,707 INFO L226 Difference]: Without dead ends: 6647 [2022-03-15 15:27:52,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=740, Invalid=2340, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 15:27:52,708 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 361 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:52,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 300 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6647 states. [2022-03-15 15:27:52,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6647 to 2933. [2022-03-15 15:27:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2932 states have (on average 3.6306275579809) internal successors, (10645), 2932 states have internal predecessors, (10645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:52,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 10645 transitions. [2022-03-15 15:27:52,828 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 10645 transitions. Word has length 21 [2022-03-15 15:27:52,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:52,828 INFO L470 AbstractCegarLoop]: Abstraction has 2933 states and 10645 transitions. [2022-03-15 15:27:52,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:52,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 10645 transitions. [2022-03-15 15:27:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:52,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:52,833 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:52,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:53,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:53,035 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:53,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:53,035 INFO L85 PathProgramCache]: Analyzing trace with hash -369540942, now seen corresponding path program 7 times [2022-03-15 15:27:53,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:53,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120475199] [2022-03-15 15:27:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:53,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:53,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:53,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120475199] [2022-03-15 15:27:53,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120475199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:53,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226173174] [2022-03-15 15:27:53,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:27:53,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:53,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:53,088 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:53,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 15:27:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:53,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:53,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:53,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:53,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226173174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:53,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:53,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-15 15:27:53,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577143077] [2022-03-15 15:27:53,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:53,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:27:53,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:53,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:27:53,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:27:53,238 INFO L87 Difference]: Start difference. First operand 2933 states and 10645 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:53,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:53,605 INFO L93 Difference]: Finished difference Result 3680 states and 12565 transitions. [2022-03-15 15:27:53,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:27:53,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:53,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:53,614 INFO L225 Difference]: With dead ends: 3680 [2022-03-15 15:27:53,614 INFO L226 Difference]: Without dead ends: 3672 [2022-03-15 15:27:53,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:27:53,615 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 143 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:53,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 223 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:53,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2022-03-15 15:27:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 2993. [2022-03-15 15:27:53,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2992 states have (on average 3.615975935828877) internal successors, (10819), 2992 states have internal predecessors, (10819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:53,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 10819 transitions. [2022-03-15 15:27:53,672 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 10819 transitions. Word has length 21 [2022-03-15 15:27:53,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:53,672 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 10819 transitions. [2022-03-15 15:27:53,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:53,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 10819 transitions. [2022-03-15 15:27:53,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:53,679 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:53,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:53,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:53,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-15 15:27:53,887 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:53,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:53,888 INFO L85 PathProgramCache]: Analyzing trace with hash 78717418, now seen corresponding path program 8 times [2022-03-15 15:27:53,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:53,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124742980] [2022-03-15 15:27:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:53,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:53,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:53,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124742980] [2022-03-15 15:27:53,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124742980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:53,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327038019] [2022-03-15 15:27:53,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:53,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:53,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:53,921 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:53,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 15:27:53,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:53,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:53,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:53,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:54,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:54,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327038019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:54,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:54,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-15 15:27:54,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032787866] [2022-03-15 15:27:54,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:54,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:27:54,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:27:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:27:54,098 INFO L87 Difference]: Start difference. First operand 2993 states and 10819 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) [2022-03-15 15:27:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:54,697 INFO L93 Difference]: Finished difference Result 4006 states and 13387 transitions. [2022-03-15 15:27:54,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 15:27:54,697 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 21 [2022-03-15 15:27:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:54,705 INFO L225 Difference]: With dead ends: 4006 [2022-03-15 15:27:54,706 INFO L226 Difference]: Without dead ends: 3998 [2022-03-15 15:27:54,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=459, Invalid=1611, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 15:27:54,707 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 237 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:54,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 195 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3998 states. [2022-03-15 15:27:54,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3998 to 3031. [2022-03-15 15:27:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 3030 states have (on average 3.613201320132013) internal successors, (10948), 3030 states have internal predecessors, (10948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 10948 transitions. [2022-03-15 15:27:54,763 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 10948 transitions. Word has length 21 [2022-03-15 15:27:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:54,764 INFO L470 AbstractCegarLoop]: Abstraction has 3031 states and 10948 transitions. [2022-03-15 15:27:54,764 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) [2022-03-15 15:27:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 10948 transitions. [2022-03-15 15:27:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:54,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:54,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:54,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:54,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:54,985 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:54,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:54,986 INFO L85 PathProgramCache]: Analyzing trace with hash -48158230, now seen corresponding path program 9 times [2022-03-15 15:27:54,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:54,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518286374] [2022-03-15 15:27:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:54,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:55,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:55,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518286374] [2022-03-15 15:27:55,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518286374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:55,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128315615] [2022-03-15 15:27:55,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:27:55,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:55,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:55,013 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:55,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 15:27:55,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:27:55,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:55,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:55,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:55,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:55,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128315615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:55,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:55,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-15 15:27:55,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912179149] [2022-03-15 15:27:55,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:55,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:27:55,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:55,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:27:55,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:27:55,215 INFO L87 Difference]: Start difference. First operand 3031 states and 10948 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:55,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:55,663 INFO L93 Difference]: Finished difference Result 3847 states and 12978 transitions. [2022-03-15 15:27:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:27:55,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:55,671 INFO L225 Difference]: With dead ends: 3847 [2022-03-15 15:27:55,671 INFO L226 Difference]: Without dead ends: 3826 [2022-03-15 15:27:55,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=1278, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:27:55,672 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 188 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:55,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 287 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:55,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2022-03-15 15:27:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2972. [2022-03-15 15:27:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 2971 states have (on average 3.6226859643217773) internal successors, (10763), 2971 states have internal predecessors, (10763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 10763 transitions. [2022-03-15 15:27:55,727 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 10763 transitions. Word has length 21 [2022-03-15 15:27:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:55,727 INFO L470 AbstractCegarLoop]: Abstraction has 2972 states and 10763 transitions. [2022-03-15 15:27:55,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 10763 transitions. [2022-03-15 15:27:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:55,732 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:55,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:55,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:55,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-15 15:27:55,941 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:55,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:55,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1428493522, now seen corresponding path program 10 times [2022-03-15 15:27:55,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:55,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288703218] [2022-03-15 15:27:55,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:55,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:56,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:56,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288703218] [2022-03-15 15:27:56,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288703218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:56,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802179414] [2022-03-15 15:27:56,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:27:56,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:56,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:56,002 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:56,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 15:27:56,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:27:56,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:56,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:56,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:56,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:56,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802179414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:56,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:56,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-15 15:27:56,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858977100] [2022-03-15 15:27:56,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:56,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:27:56,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:56,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:27:56,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:27:56,181 INFO L87 Difference]: Start difference. First operand 2972 states and 10763 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:56,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:56,855 INFO L93 Difference]: Finished difference Result 4280 states and 14653 transitions. [2022-03-15 15:27:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:27:56,856 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:56,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:56,864 INFO L225 Difference]: With dead ends: 4280 [2022-03-15 15:27:56,865 INFO L226 Difference]: Without dead ends: 4272 [2022-03-15 15:27:56,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=1225, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:27:56,865 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 151 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:56,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 315 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:56,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4272 states. [2022-03-15 15:27:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4272 to 2956. [2022-03-15 15:27:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 3.632148900169205) internal successors, (10733), 2955 states have internal predecessors, (10733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:56,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 10733 transitions. [2022-03-15 15:27:56,966 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 10733 transitions. Word has length 21 [2022-03-15 15:27:56,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:56,967 INFO L470 AbstractCegarLoop]: Abstraction has 2956 states and 10733 transitions. [2022-03-15 15:27:56,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:56,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 10733 transitions. [2022-03-15 15:27:56,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:56,972 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:56,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:56,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-15 15:27:57,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-15 15:27:57,175 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:57,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:57,176 INFO L85 PathProgramCache]: Analyzing trace with hash -981882646, now seen corresponding path program 6 times [2022-03-15 15:27:57,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:57,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741749900] [2022-03-15 15:27:57,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:57,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:57,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:57,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741749900] [2022-03-15 15:27:57,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741749900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:57,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314293009] [2022-03-15 15:27:57,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:27:57,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:57,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:57,210 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:57,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 15:27:57,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:27:57,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 15:27:57,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:57,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:57,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314293009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:57,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:57,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-03-15 15:27:57,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144749977] [2022-03-15 15:27:57,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:57,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:27:57,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:27:57,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:27:57,376 INFO L87 Difference]: Start difference. First operand 2956 states and 10733 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:58,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:58,149 INFO L93 Difference]: Finished difference Result 5648 states and 18229 transitions. [2022-03-15 15:27:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 15:27:58,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:27:58,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:58,161 INFO L225 Difference]: With dead ends: 5648 [2022-03-15 15:27:58,161 INFO L226 Difference]: Without dead ends: 5608 [2022-03-15 15:27:58,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=775, Invalid=3131, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 15:27:58,163 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 461 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:58,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 263 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:58,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5608 states. [2022-03-15 15:27:58,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5608 to 2636. [2022-03-15 15:27:58,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2635 states have (on average 3.5874762808349145) internal successors, (9453), 2635 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:58,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 9453 transitions. [2022-03-15 15:27:58,233 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 9453 transitions. Word has length 21 [2022-03-15 15:27:58,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:58,233 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 9453 transitions. [2022-03-15 15:27:58,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:58,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 9453 transitions. [2022-03-15 15:27:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:58,238 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:58,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:58,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 15:27:58,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 15:27:58,454 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:58,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:58,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1147980128, now seen corresponding path program 7 times [2022-03-15 15:27:58,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:58,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618522620] [2022-03-15 15:27:58,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:58,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:58,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:58,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618522620] [2022-03-15 15:27:58,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618522620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:58,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748865949] [2022-03-15 15:27:58,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:27:58,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:58,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:58,497 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:58,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 15:27:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:58,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 15:27:58,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:58,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:58,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748865949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:58,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:58,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-15 15:27:58,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266725501] [2022-03-15 15:27:58,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:58,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:27:58,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:58,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:27:58,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:27:58,718 INFO L87 Difference]: Start difference. First operand 2636 states and 9453 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:59,648 INFO L93 Difference]: Finished difference Result 6339 states and 20851 transitions. [2022-03-15 15:27:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 15:27:59,649 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 21 [2022-03-15 15:27:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:59,661 INFO L225 Difference]: With dead ends: 6339 [2022-03-15 15:27:59,661 INFO L226 Difference]: Without dead ends: 6319 [2022-03-15 15:27:59,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=757, Invalid=2435, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 15:27:59,663 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 501 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:59,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 160 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:59,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6319 states. [2022-03-15 15:27:59,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6319 to 2792. [2022-03-15 15:27:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 3.637764242207094) internal successors, (10153), 2791 states have internal predecessors, (10153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 10153 transitions. [2022-03-15 15:27:59,733 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 10153 transitions. Word has length 21 [2022-03-15 15:27:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:59,733 INFO L470 AbstractCegarLoop]: Abstraction has 2792 states and 10153 transitions. [2022-03-15 15:27:59,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:59,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 10153 transitions. [2022-03-15 15:27:59,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:27:59,741 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:59,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:59,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:59,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-15 15:27:59,957 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:27:59,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:59,957 INFO L85 PathProgramCache]: Analyzing trace with hash -169422684, now seen corresponding path program 8 times [2022-03-15 15:27:59,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:59,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84992429] [2022-03-15 15:27:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:59,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:59,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:59,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84992429] [2022-03-15 15:27:59,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84992429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:59,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695841587] [2022-03-15 15:27:59,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:59,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:59,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:59,992 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:59,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 15:28:00,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:28:00,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:00,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 15:28:00,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:00,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:00,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695841587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:00,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:00,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-15 15:28:00,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823707325] [2022-03-15 15:28:00,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:00,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:28:00,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:00,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:28:00,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:28:00,130 INFO L87 Difference]: Start difference. First operand 2792 states and 10153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:00,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:00,883 INFO L93 Difference]: Finished difference Result 6781 states and 22584 transitions. [2022-03-15 15:28:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 15:28:00,884 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:28:00,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:00,897 INFO L225 Difference]: With dead ends: 6781 [2022-03-15 15:28:00,897 INFO L226 Difference]: Without dead ends: 6781 [2022-03-15 15:28:00,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=604, Invalid=1652, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:28:00,900 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 438 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:00,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 156 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6781 states. [2022-03-15 15:28:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6781 to 2837. [2022-03-15 15:28:01,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2836 states have (on average 3.6361071932299014) internal successors, (10312), 2836 states have internal predecessors, (10312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:01,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 10312 transitions. [2022-03-15 15:28:01,009 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 10312 transitions. Word has length 21 [2022-03-15 15:28:01,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:01,010 INFO L470 AbstractCegarLoop]: Abstraction has 2837 states and 10312 transitions. [2022-03-15 15:28:01,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:01,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 10312 transitions. [2022-03-15 15:28:01,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:28:01,015 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:01,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:01,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:01,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 15:28:01,232 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:01,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1853295848, now seen corresponding path program 9 times [2022-03-15 15:28:01,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:01,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132505367] [2022-03-15 15:28:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:01,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:01,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:01,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132505367] [2022-03-15 15:28:01,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132505367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:01,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249374218] [2022-03-15 15:28:01,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:28:01,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:01,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:01,279 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:01,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 15:28:01,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:28:01,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:01,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 15:28:01,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:01,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:01,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249374218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:01,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:01,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-03-15 15:28:01,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704443651] [2022-03-15 15:28:01,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:01,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:28:01,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:01,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:28:01,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:28:01,441 INFO L87 Difference]: Start difference. First operand 2837 states and 10312 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:02,107 INFO L93 Difference]: Finished difference Result 4771 states and 15849 transitions. [2022-03-15 15:28:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 15:28:02,108 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 21 [2022-03-15 15:28:02,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:02,117 INFO L225 Difference]: With dead ends: 4771 [2022-03-15 15:28:02,117 INFO L226 Difference]: Without dead ends: 4751 [2022-03-15 15:28:02,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:28:02,117 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 277 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:02,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 166 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:02,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2022-03-15 15:28:02,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 2847. [2022-03-15 15:28:02,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 3.635628952916374) internal successors, (10347), 2846 states have internal predecessors, (10347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:02,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 10347 transitions. [2022-03-15 15:28:02,167 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 10347 transitions. Word has length 21 [2022-03-15 15:28:02,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:02,167 INFO L470 AbstractCegarLoop]: Abstraction has 2847 states and 10347 transitions. [2022-03-15 15:28:02,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:02,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 10347 transitions. [2022-03-15 15:28:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:28:02,171 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:02,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:02,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:02,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 15:28:02,383 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:02,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:02,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1140493464, now seen corresponding path program 10 times [2022-03-15 15:28:02,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:02,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939742164] [2022-03-15 15:28:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:02,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:02,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:02,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939742164] [2022-03-15 15:28:02,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939742164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:02,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736278024] [2022-03-15 15:28:02,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:28:02,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:02,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:02,436 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:02,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 15:28:02,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:28:02,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:02,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 15:28:02,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:02,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:02,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736278024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:02,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:02,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-15 15:28:02,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233142193] [2022-03-15 15:28:02,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:02,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:28:02,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:02,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:28:02,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:28:02,563 INFO L87 Difference]: Start difference. First operand 2847 states and 10347 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:03,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:03,010 INFO L93 Difference]: Finished difference Result 4772 states and 15704 transitions. [2022-03-15 15:28:03,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 15:28:03,010 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 21 [2022-03-15 15:28:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:03,019 INFO L225 Difference]: With dead ends: 4772 [2022-03-15 15:28:03,019 INFO L226 Difference]: Without dead ends: 4744 [2022-03-15 15:28:03,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1739, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 15:28:03,020 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 304 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:03,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 149 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:03,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2022-03-15 15:28:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 2845. [2022-03-15 15:28:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 3.6353727144866386) internal successors, (10339), 2844 states have internal predecessors, (10339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 10339 transitions. [2022-03-15 15:28:03,074 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 10339 transitions. Word has length 21 [2022-03-15 15:28:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:03,075 INFO L470 AbstractCegarLoop]: Abstraction has 2845 states and 10339 transitions. [2022-03-15 15:28:03,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 10339 transitions. [2022-03-15 15:28:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:28:03,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:03,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:03,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-15 15:28:03,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-15 15:28:03,300 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:03,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:03,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1138871444, now seen corresponding path program 11 times [2022-03-15 15:28:03,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:03,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751836310] [2022-03-15 15:28:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:03,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:03,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:03,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751836310] [2022-03-15 15:28:03,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751836310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:03,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196481177] [2022-03-15 15:28:03,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:28:03,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:03,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:03,340 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:03,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 15:28:03,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:28:03,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:03,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 15:28:03,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:03,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:03,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196481177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:03,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:03,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-03-15 15:28:03,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313612262] [2022-03-15 15:28:03,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:03,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:28:03,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:03,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:28:03,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:28:03,522 INFO L87 Difference]: Start difference. First operand 2845 states and 10339 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:04,152 INFO L93 Difference]: Finished difference Result 6771 states and 22668 transitions. [2022-03-15 15:28:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 15:28:04,152 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:28:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:04,167 INFO L225 Difference]: With dead ends: 6771 [2022-03-15 15:28:04,167 INFO L226 Difference]: Without dead ends: 6771 [2022-03-15 15:28:04,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=479, Invalid=1081, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:28:04,168 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 245 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:04,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 172 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:04,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6771 states. [2022-03-15 15:28:04,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6771 to 2907. [2022-03-15 15:28:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 2906 states have (on average 3.6593255333792154) internal successors, (10634), 2906 states have internal predecessors, (10634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 10634 transitions. [2022-03-15 15:28:04,245 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 10634 transitions. Word has length 21 [2022-03-15 15:28:04,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:04,245 INFO L470 AbstractCegarLoop]: Abstraction has 2907 states and 10634 transitions. [2022-03-15 15:28:04,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:04,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 10634 transitions. [2022-03-15 15:28:04,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:28:04,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:04,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:04,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:04,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:04,465 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:04,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:04,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1036153892, now seen corresponding path program 12 times [2022-03-15 15:28:04,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:04,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406698523] [2022-03-15 15:28:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:04,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:04,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:04,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406698523] [2022-03-15 15:28:04,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406698523] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:04,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076030713] [2022-03-15 15:28:04,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:28:04,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:04,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:04,498 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:04,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 15:28:04,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:28:04,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:04,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 15:28:04,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:04,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:04,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076030713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:04,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:04,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-03-15 15:28:04,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177823264] [2022-03-15 15:28:04,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:04,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:28:04,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:04,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:28:04,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:28:04,655 INFO L87 Difference]: Start difference. First operand 2907 states and 10634 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:05,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:05,271 INFO L93 Difference]: Finished difference Result 5977 states and 19851 transitions. [2022-03-15 15:28:05,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 15:28:05,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:28:05,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:05,282 INFO L225 Difference]: With dead ends: 5977 [2022-03-15 15:28:05,282 INFO L226 Difference]: Without dead ends: 5951 [2022-03-15 15:28:05,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:28:05,283 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 253 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:05,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 199 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:05,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2022-03-15 15:28:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 2903. [2022-03-15 15:28:05,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 3.6574776016540316) internal successors, (10614), 2902 states have internal predecessors, (10614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 10614 transitions. [2022-03-15 15:28:05,351 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 10614 transitions. Word has length 21 [2022-03-15 15:28:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:05,351 INFO L470 AbstractCegarLoop]: Abstraction has 2903 states and 10614 transitions. [2022-03-15 15:28:05,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 10614 transitions. [2022-03-15 15:28:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 15:28:05,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:05,355 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:05,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:05,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-15 15:28:05,559 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:05,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:05,559 INFO L85 PathProgramCache]: Analyzing trace with hash 766836878, now seen corresponding path program 20 times [2022-03-15 15:28:05,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:05,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192335296] [2022-03-15 15:28:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:05,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:05,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:05,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192335296] [2022-03-15 15:28:05,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192335296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:05,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660171236] [2022-03-15 15:28:05,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:28:05,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:05,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:05,616 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:05,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 15:28:05,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:28:05,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:05,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:28:05,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:05,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:05,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660171236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:05,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:05,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 10 [2022-03-15 15:28:05,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600274485] [2022-03-15 15:28:05,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:05,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:28:05,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:05,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:28:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:28:05,889 INFO L87 Difference]: Start difference. First operand 2903 states and 10614 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:05,992 INFO L93 Difference]: Finished difference Result 4177 states and 14782 transitions. [2022-03-15 15:28:05,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:28:05,992 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 15:28:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:06,001 INFO L225 Difference]: With dead ends: 4177 [2022-03-15 15:28:06,001 INFO L226 Difference]: Without dead ends: 4147 [2022-03-15 15:28:06,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:28:06,002 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 87 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:06,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 252 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:28:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2022-03-15 15:28:06,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 3663. [2022-03-15 15:28:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 3.671764063353359) internal successors, (13446), 3662 states have internal predecessors, (13446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:06,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 13446 transitions. [2022-03-15 15:28:06,083 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 13446 transitions. Word has length 23 [2022-03-15 15:28:06,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:06,083 INFO L470 AbstractCegarLoop]: Abstraction has 3663 states and 13446 transitions. [2022-03-15 15:28:06,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:06,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 13446 transitions. [2022-03-15 15:28:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 15:28:06,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:06,088 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:06,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-15 15:28:06,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:06,303 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash 728482628, now seen corresponding path program 21 times [2022-03-15 15:28:06,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:06,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978446902] [2022-03-15 15:28:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:06,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:28:06,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:06,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978446902] [2022-03-15 15:28:06,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978446902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:06,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965675720] [2022-03-15 15:28:06,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:28:06,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:06,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:06,372 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:06,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 15:28:06,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:28:06,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:06,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:28:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:06,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 15:28:06,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965675720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:06,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:06,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 10 [2022-03-15 15:28:06,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099080193] [2022-03-15 15:28:06,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:06,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:28:06,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:06,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:28:06,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:28:06,636 INFO L87 Difference]: Start difference. First operand 3663 states and 13446 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:06,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:06,755 INFO L93 Difference]: Finished difference Result 4935 states and 17632 transitions. [2022-03-15 15:28:06,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:28:06,756 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 15:28:06,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:06,764 INFO L225 Difference]: With dead ends: 4935 [2022-03-15 15:28:06,764 INFO L226 Difference]: Without dead ends: 4886 [2022-03-15 15:28:06,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:28:06,765 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 80 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:06,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 301 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:28:06,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4886 states. [2022-03-15 15:28:06,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4886 to 4276. [2022-03-15 15:28:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4276 states, 4275 states have (on average 3.705497076023392) internal successors, (15841), 4275 states have internal predecessors, (15841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 15841 transitions. [2022-03-15 15:28:06,834 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 15841 transitions. Word has length 23 [2022-03-15 15:28:06,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:06,834 INFO L470 AbstractCegarLoop]: Abstraction has 4276 states and 15841 transitions. [2022-03-15 15:28:06,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 15841 transitions. [2022-03-15 15:28:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 15:28:06,840 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:06,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:06,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:07,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:07,056 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:07,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:07,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1508260362, now seen corresponding path program 13 times [2022-03-15 15:28:07,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:07,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676441759] [2022-03-15 15:28:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:07,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:07,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:07,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676441759] [2022-03-15 15:28:07,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676441759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:07,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772405270] [2022-03-15 15:28:07,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:28:07,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:07,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:07,125 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:07,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 15:28:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:07,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:28:07,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:07,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 15:28:07,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772405270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:07,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:07,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 12 [2022-03-15 15:28:07,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540062265] [2022-03-15 15:28:07,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:07,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:28:07,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:07,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:28:07,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:28:07,398 INFO L87 Difference]: Start difference. First operand 4276 states and 15841 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:07,555 INFO L93 Difference]: Finished difference Result 5177 states and 18578 transitions. [2022-03-15 15:28:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:28:07,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 15:28:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:07,566 INFO L225 Difference]: With dead ends: 5177 [2022-03-15 15:28:07,566 INFO L226 Difference]: Without dead ends: 5147 [2022-03-15 15:28:07,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:28:07,567 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 109 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:07,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 192 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:28:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2022-03-15 15:28:07,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 4699. [2022-03-15 15:28:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4699 states, 4698 states have (on average 3.691996594295445) internal successors, (17345), 4698 states have internal predecessors, (17345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4699 states to 4699 states and 17345 transitions. [2022-03-15 15:28:07,653 INFO L78 Accepts]: Start accepts. Automaton has 4699 states and 17345 transitions. Word has length 23 [2022-03-15 15:28:07,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:07,653 INFO L470 AbstractCegarLoop]: Abstraction has 4699 states and 17345 transitions. [2022-03-15 15:28:07,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:07,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4699 states and 17345 transitions. [2022-03-15 15:28:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:07,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:07,660 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:07,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:07,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-15 15:28:07,875 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:07,875 INFO L85 PathProgramCache]: Analyzing trace with hash -160336528, now seen corresponding path program 22 times [2022-03-15 15:28:07,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:07,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430553937] [2022-03-15 15:28:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:07,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:07,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:07,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430553937] [2022-03-15 15:28:07,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430553937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:07,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267330769] [2022-03-15 15:28:07,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:28:07,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:07,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:07,916 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:07,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 15:28:07,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:28:07,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:07,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:28:07,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:08,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:08,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267330769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:08,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:08,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:28:08,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626323917] [2022-03-15 15:28:08,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:08,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:28:08,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:08,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:28:08,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:28:08,086 INFO L87 Difference]: Start difference. First operand 4699 states and 17345 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:08,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:08,333 INFO L93 Difference]: Finished difference Result 8376 states and 29016 transitions. [2022-03-15 15:28:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:28:08,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:08,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:08,349 INFO L225 Difference]: With dead ends: 8376 [2022-03-15 15:28:08,350 INFO L226 Difference]: Without dead ends: 8376 [2022-03-15 15:28:08,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:28:08,350 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 238 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:08,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 151 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:28:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2022-03-15 15:28:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 5256. [2022-03-15 15:28:08,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 5255 states have (on average 3.7069457659372027) internal successors, (19480), 5255 states have internal predecessors, (19480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 19480 transitions. [2022-03-15 15:28:08,493 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 19480 transitions. Word has length 25 [2022-03-15 15:28:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:08,494 INFO L470 AbstractCegarLoop]: Abstraction has 5256 states and 19480 transitions. [2022-03-15 15:28:08,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 19480 transitions. [2022-03-15 15:28:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:08,501 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:08,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:08,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:08,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-15 15:28:08,717 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:08,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:08,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1841814858, now seen corresponding path program 14 times [2022-03-15 15:28:08,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:08,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885062707] [2022-03-15 15:28:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:08,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:08,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:08,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885062707] [2022-03-15 15:28:08,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885062707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:08,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638523941] [2022-03-15 15:28:08,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:28:08,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:08,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:08,759 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:08,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 15:28:08,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:28:08,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:08,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:28:08,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:08,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:09,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638523941] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:09,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:09,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:28:09,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762099699] [2022-03-15 15:28:09,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:09,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:28:09,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:09,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:28:09,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:28:09,001 INFO L87 Difference]: Start difference. First operand 5256 states and 19480 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) [2022-03-15 15:28:09,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:09,780 INFO L93 Difference]: Finished difference Result 16483 states and 56277 transitions. [2022-03-15 15:28:09,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 15:28:09,780 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 25 [2022-03-15 15:28:09,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:09,819 INFO L225 Difference]: With dead ends: 16483 [2022-03-15 15:28:09,820 INFO L226 Difference]: Without dead ends: 16469 [2022-03-15 15:28:09,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:28:09,820 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 285 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:09,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 238 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16469 states. [2022-03-15 15:28:10,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16469 to 7242. [2022-03-15 15:28:10,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 7241 states have (on average 3.7090180914238364) internal successors, (26857), 7241 states have internal predecessors, (26857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 26857 transitions. [2022-03-15 15:28:10,042 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 26857 transitions. Word has length 25 [2022-03-15 15:28:10,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:10,042 INFO L470 AbstractCegarLoop]: Abstraction has 7242 states and 26857 transitions. [2022-03-15 15:28:10,042 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) [2022-03-15 15:28:10,042 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 26857 transitions. [2022-03-15 15:28:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:10,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:10,055 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:10,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-15 15:28:10,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-15 15:28:10,270 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:10,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:10,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1366799892, now seen corresponding path program 23 times [2022-03-15 15:28:10,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:10,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485372597] [2022-03-15 15:28:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:10,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:10,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:10,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485372597] [2022-03-15 15:28:10,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485372597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:10,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075791446] [2022-03-15 15:28:10,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:28:10,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:10,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:10,324 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:10,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 15:28:10,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:28:10,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:10,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:10,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:10,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:10,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075791446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:10,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:10,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:28:10,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487346094] [2022-03-15 15:28:10,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:10,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:28:10,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:10,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:28:10,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:28:10,595 INFO L87 Difference]: Start difference. First operand 7242 states and 26857 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) [2022-03-15 15:28:11,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:11,883 INFO L93 Difference]: Finished difference Result 11227 states and 38311 transitions. [2022-03-15 15:28:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 15:28:11,883 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 25 [2022-03-15 15:28:11,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:11,906 INFO L225 Difference]: With dead ends: 11227 [2022-03-15 15:28:11,906 INFO L226 Difference]: Without dead ends: 11149 [2022-03-15 15:28:11,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1184, Invalid=3928, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 15:28:11,907 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 448 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:11,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 295 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:28:11,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11149 states. [2022-03-15 15:28:12,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11149 to 7430. [2022-03-15 15:28:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.7025171624713957) internal successors, (27506), 7429 states have internal predecessors, (27506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:12,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 27506 transitions. [2022-03-15 15:28:12,076 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 27506 transitions. Word has length 25 [2022-03-15 15:28:12,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:12,076 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 27506 transitions. [2022-03-15 15:28:12,076 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) [2022-03-15 15:28:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 27506 transitions. [2022-03-15 15:28:12,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:12,092 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:12,092 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:12,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:12,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-15 15:28:12,307 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:12,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:12,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1557416792, now seen corresponding path program 24 times [2022-03-15 15:28:12,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:12,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006521853] [2022-03-15 15:28:12,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:12,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:12,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:12,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006521853] [2022-03-15 15:28:12,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006521853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:12,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431685820] [2022-03-15 15:28:12,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:28:12,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:12,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:12,368 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:12,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:28:12,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:12,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:12,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:12,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 15:28:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:12,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:12,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431685820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:12,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:12,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:28:12,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301845815] [2022-03-15 15:28:12,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:12,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:28:12,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:12,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:28:12,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:28:12,654 INFO L87 Difference]: Start difference. First operand 7430 states and 27506 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:15,030 INFO L93 Difference]: Finished difference Result 13553 states and 44980 transitions. [2022-03-15 15:28:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-15 15:28:15,031 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:15,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:15,065 INFO L225 Difference]: With dead ends: 13553 [2022-03-15 15:28:15,065 INFO L226 Difference]: Without dead ends: 13553 [2022-03-15 15:28:15,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5966 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3518, Invalid=11244, Unknown=0, NotChecked=0, Total=14762 [2022-03-15 15:28:15,067 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 631 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:15,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 302 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:28:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13553 states. [2022-03-15 15:28:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13553 to 7458. [2022-03-15 15:28:15,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 7457 states have (on average 3.7017567386348396) internal successors, (27604), 7457 states have internal predecessors, (27604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 27604 transitions. [2022-03-15 15:28:15,302 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 27604 transitions. Word has length 25 [2022-03-15 15:28:15,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:15,302 INFO L470 AbstractCegarLoop]: Abstraction has 7458 states and 27604 transitions. [2022-03-15 15:28:15,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:15,302 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 27604 transitions. [2022-03-15 15:28:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:15,315 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:15,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:15,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:15,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 15:28:15,531 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:15,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1325882792, now seen corresponding path program 15 times [2022-03-15 15:28:15,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:15,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023654440] [2022-03-15 15:28:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:15,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:15,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:15,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023654440] [2022-03-15 15:28:15,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023654440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:15,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915898564] [2022-03-15 15:28:15,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:28:15,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:15,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:15,568 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:15,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:28:15,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:15,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:28:15,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:15,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 15:28:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:15,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:15,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915898564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:15,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:15,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:28:15,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716531812] [2022-03-15 15:28:15,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:15,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:28:15,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:15,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:28:15,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:28:15,824 INFO L87 Difference]: Start difference. First operand 7458 states and 27604 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:17,351 INFO L93 Difference]: Finished difference Result 18954 states and 64865 transitions. [2022-03-15 15:28:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 15:28:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:17,408 INFO L225 Difference]: With dead ends: 18954 [2022-03-15 15:28:17,408 INFO L226 Difference]: Without dead ends: 18932 [2022-03-15 15:28:17,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1214, Invalid=4638, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 15:28:17,409 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 398 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:17,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 344 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 15:28:17,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18932 states. [2022-03-15 15:28:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18932 to 8787. [2022-03-15 15:28:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8787 states, 8786 states have (on average 3.766332802185295) internal successors, (33091), 8786 states have internal predecessors, (33091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8787 states to 8787 states and 33091 transitions. [2022-03-15 15:28:17,714 INFO L78 Accepts]: Start accepts. Automaton has 8787 states and 33091 transitions. Word has length 25 [2022-03-15 15:28:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:17,714 INFO L470 AbstractCegarLoop]: Abstraction has 8787 states and 33091 transitions. [2022-03-15 15:28:17,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 8787 states and 33091 transitions. [2022-03-15 15:28:17,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:17,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:17,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:17,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-15 15:28:17,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:17,941 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:17,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:17,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1990527060, now seen corresponding path program 16 times [2022-03-15 15:28:17,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:17,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151334271] [2022-03-15 15:28:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:17,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:17,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:17,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151334271] [2022-03-15 15:28:17,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151334271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:17,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444348087] [2022-03-15 15:28:17,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:28:17,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:17,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:17,985 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:17,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 15:28:18,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:28:18,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:18,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:28:18,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:18,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:18,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444348087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:18,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:18,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:28:18,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707446297] [2022-03-15 15:28:18,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:18,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:28:18,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:28:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:28:18,228 INFO L87 Difference]: Start difference. First operand 8787 states and 33091 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) [2022-03-15 15:28:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:19,464 INFO L93 Difference]: Finished difference Result 21846 states and 74430 transitions. [2022-03-15 15:28:19,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 15:28:19,465 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 25 [2022-03-15 15:28:19,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:19,527 INFO L225 Difference]: With dead ends: 21846 [2022-03-15 15:28:19,527 INFO L226 Difference]: Without dead ends: 21804 [2022-03-15 15:28:19,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=954, Invalid=3206, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 15:28:19,528 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 353 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:19,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 459 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:28:19,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21804 states. [2022-03-15 15:28:19,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21804 to 7140. [2022-03-15 15:28:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 7139 states have (on average 3.7089228183218936) internal successors, (26478), 7139 states have internal predecessors, (26478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 26478 transitions. [2022-03-15 15:28:19,841 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 26478 transitions. Word has length 25 [2022-03-15 15:28:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:19,841 INFO L470 AbstractCegarLoop]: Abstraction has 7140 states and 26478 transitions. [2022-03-15 15:28:19,841 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) [2022-03-15 15:28:19,841 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 26478 transitions. [2022-03-15 15:28:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:19,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:19,855 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:19,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:20,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:20,070 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:20,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1684292440, now seen corresponding path program 25 times [2022-03-15 15:28:20,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:20,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655817183] [2022-03-15 15:28:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:20,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:20,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:20,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655817183] [2022-03-15 15:28:20,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655817183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:20,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985902171] [2022-03-15 15:28:20,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:28:20,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:20,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:20,132 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:20,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 15:28:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:20,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:20,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:20,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:20,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985902171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:20,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:20,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:28:20,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778946393] [2022-03-15 15:28:20,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:20,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:28:20,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:20,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:28:20,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:28:20,382 INFO L87 Difference]: Start difference. First operand 7140 states and 26478 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) [2022-03-15 15:28:21,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:21,776 INFO L93 Difference]: Finished difference Result 11568 states and 38925 transitions. [2022-03-15 15:28:21,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-15 15:28:21,776 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 25 [2022-03-15 15:28:21,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:21,803 INFO L225 Difference]: With dead ends: 11568 [2022-03-15 15:28:21,803 INFO L226 Difference]: Without dead ends: 11533 [2022-03-15 15:28:21,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1690, Invalid=5116, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 15:28:21,804 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 542 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:21,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 289 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:28:21,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11533 states. [2022-03-15 15:28:22,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11533 to 7088. [2022-03-15 15:28:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7088 states, 7087 states have (on average 3.709891350359814) internal successors, (26292), 7087 states have internal predecessors, (26292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7088 states to 7088 states and 26292 transitions. [2022-03-15 15:28:22,038 INFO L78 Accepts]: Start accepts. Automaton has 7088 states and 26292 transitions. Word has length 25 [2022-03-15 15:28:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:22,038 INFO L470 AbstractCegarLoop]: Abstraction has 7088 states and 26292 transitions. [2022-03-15 15:28:22,038 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) [2022-03-15 15:28:22,038 INFO L276 IsEmpty]: Start isEmpty. Operand 7088 states and 26292 transitions. [2022-03-15 15:28:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:22,052 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:22,052 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:22,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:22,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:22,268 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:22,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:22,268 INFO L85 PathProgramCache]: Analyzing trace with hash 774400428, now seen corresponding path program 26 times [2022-03-15 15:28:22,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:22,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577438470] [2022-03-15 15:28:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:22,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:22,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:22,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577438470] [2022-03-15 15:28:22,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577438470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:22,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549500422] [2022-03-15 15:28:22,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:28:22,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:22,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:22,308 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:22,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 15:28:22,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:28:22,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:22,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:22,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:22,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:22,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549500422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:22,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:22,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:28:22,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903826722] [2022-03-15 15:28:22,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:22,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:28:22,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:22,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:28:22,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:28:22,539 INFO L87 Difference]: Start difference. First operand 7088 states and 26292 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) [2022-03-15 15:28:23,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:23,582 INFO L93 Difference]: Finished difference Result 11527 states and 38863 transitions. [2022-03-15 15:28:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 15:28:23,582 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 25 [2022-03-15 15:28:23,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:23,610 INFO L225 Difference]: With dead ends: 11527 [2022-03-15 15:28:23,610 INFO L226 Difference]: Without dead ends: 11443 [2022-03-15 15:28:23,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1490, Invalid=4830, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 15:28:23,612 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 480 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:23,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 278 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:23,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11443 states. [2022-03-15 15:28:23,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11443 to 7218. [2022-03-15 15:28:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 3.6953027573784123) internal successors, (26669), 7217 states have internal predecessors, (26669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 26669 transitions. [2022-03-15 15:28:23,825 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 26669 transitions. Word has length 25 [2022-03-15 15:28:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:23,825 INFO L470 AbstractCegarLoop]: Abstraction has 7218 states and 26669 transitions. [2022-03-15 15:28:23,825 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) [2022-03-15 15:28:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 26669 transitions. [2022-03-15 15:28:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:23,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:23,839 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:23,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:24,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:24,055 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:24,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:24,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1196321260, now seen corresponding path program 27 times [2022-03-15 15:28:24,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:24,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030152679] [2022-03-15 15:28:24,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:24,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:24,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:24,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030152679] [2022-03-15 15:28:24,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030152679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:24,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534832694] [2022-03-15 15:28:24,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:28:24,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:24,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:24,132 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:24,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:28:24,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:24,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 15:28:24,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:24,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:24,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:24,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534832694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:24,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:24,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:28:24,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219202664] [2022-03-15 15:28:24,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:24,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:28:24,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:24,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:28:24,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:28:24,409 INFO L87 Difference]: Start difference. First operand 7218 states and 26669 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) [2022-03-15 15:28:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:25,505 INFO L93 Difference]: Finished difference Result 11296 states and 38475 transitions. [2022-03-15 15:28:25,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 15:28:25,509 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 25 [2022-03-15 15:28:25,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:25,539 INFO L225 Difference]: With dead ends: 11296 [2022-03-15 15:28:25,539 INFO L226 Difference]: Without dead ends: 11218 [2022-03-15 15:28:25,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1184, Invalid=3928, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 15:28:25,540 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 501 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:25,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 244 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11218 states. [2022-03-15 15:28:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11218 to 7595. [2022-03-15 15:28:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7595 states, 7594 states have (on average 3.6906768501448513) internal successors, (28027), 7594 states have internal predecessors, (28027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:25,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7595 states to 7595 states and 28027 transitions. [2022-03-15 15:28:25,761 INFO L78 Accepts]: Start accepts. Automaton has 7595 states and 28027 transitions. Word has length 25 [2022-03-15 15:28:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:25,761 INFO L470 AbstractCegarLoop]: Abstraction has 7595 states and 28027 transitions. [2022-03-15 15:28:25,761 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) [2022-03-15 15:28:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 7595 states and 28027 transitions. [2022-03-15 15:28:25,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:25,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:25,774 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:25,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:25,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-15 15:28:25,979 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:25,980 INFO L85 PathProgramCache]: Analyzing trace with hash 609334184, now seen corresponding path program 28 times [2022-03-15 15:28:25,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:25,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660858231] [2022-03-15 15:28:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:25,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:26,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:26,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660858231] [2022-03-15 15:28:26,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660858231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:26,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19756189] [2022-03-15 15:28:26,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:28:26,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:26,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:26,030 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:26,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 15:28:26,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:28:26,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:26,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:26,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:26,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19756189] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:26,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:26,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:28:26,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744211723] [2022-03-15 15:28:26,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:26,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:28:26,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:26,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:28:26,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:28:26,294 INFO L87 Difference]: Start difference. First operand 7595 states and 28027 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) [2022-03-15 15:28:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:27,753 INFO L93 Difference]: Finished difference Result 12317 states and 41373 transitions. [2022-03-15 15:28:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-15 15:28:27,753 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 25 [2022-03-15 15:28:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:27,788 INFO L225 Difference]: With dead ends: 12317 [2022-03-15 15:28:27,788 INFO L226 Difference]: Without dead ends: 12212 [2022-03-15 15:28:27,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1776, Invalid=5880, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 15:28:27,802 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 570 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:27,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 276 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:28:27,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12212 states. [2022-03-15 15:28:28,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12212 to 7949. [2022-03-15 15:28:28,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7949 states, 7948 states have (on average 3.665450427780574) internal successors, (29133), 7948 states have internal predecessors, (29133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7949 states to 7949 states and 29133 transitions. [2022-03-15 15:28:28,045 INFO L78 Accepts]: Start accepts. Automaton has 7949 states and 29133 transitions. Word has length 25 [2022-03-15 15:28:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:28,046 INFO L470 AbstractCegarLoop]: Abstraction has 7949 states and 29133 transitions. [2022-03-15 15:28:28,046 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) [2022-03-15 15:28:28,046 INFO L276 IsEmpty]: Start isEmpty. Operand 7949 states and 29133 transitions. [2022-03-15 15:28:28,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:28,060 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:28,060 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:28,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-15 15:28:28,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-15 15:28:28,263 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:28,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1801800616, now seen corresponding path program 29 times [2022-03-15 15:28:28,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:28,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491561050] [2022-03-15 15:28:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:28,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:28,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:28,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491561050] [2022-03-15 15:28:28,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491561050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:28,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127359573] [2022-03-15 15:28:28,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:28:28,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:28,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:28,317 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:28,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 15:28:28,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:28:28,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:28,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:28,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:28,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:28,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127359573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:28,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:28,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:28:28,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135089076] [2022-03-15 15:28:28,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:28,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:28:28,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:28,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:28:28,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:28:28,577 INFO L87 Difference]: Start difference. First operand 7949 states and 29133 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) [2022-03-15 15:28:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:30,076 INFO L93 Difference]: Finished difference Result 12441 states and 41823 transitions. [2022-03-15 15:28:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-15 15:28:30,077 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 25 [2022-03-15 15:28:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:30,106 INFO L225 Difference]: With dead ends: 12441 [2022-03-15 15:28:30,106 INFO L226 Difference]: Without dead ends: 12392 [2022-03-15 15:28:30,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3281 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2096, Invalid=6460, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 15:28:30,108 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 615 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:30,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 277 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:28:30,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12392 states. [2022-03-15 15:28:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12392 to 8090. [2022-03-15 15:28:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8090 states, 8089 states have (on average 3.658795895660774) internal successors, (29596), 8089 states have internal predecessors, (29596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8090 states to 8090 states and 29596 transitions. [2022-03-15 15:28:30,331 INFO L78 Accepts]: Start accepts. Automaton has 8090 states and 29596 transitions. Word has length 25 [2022-03-15 15:28:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:30,331 INFO L470 AbstractCegarLoop]: Abstraction has 8090 states and 29596 transitions. [2022-03-15 15:28:30,331 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) [2022-03-15 15:28:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 8090 states and 29596 transitions. [2022-03-15 15:28:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:30,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:30,345 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:30,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:30,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-15 15:28:30,559 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:30,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:30,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1388571988, now seen corresponding path program 30 times [2022-03-15 15:28:30,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:30,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402013027] [2022-03-15 15:28:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:30,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:30,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:30,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402013027] [2022-03-15 15:28:30,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402013027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:30,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977793151] [2022-03-15 15:28:30,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:28:30,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:30,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:30,608 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:30,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 15:28:30,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:28:30,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:30,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:30,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:30,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:30,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977793151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:30,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:30,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:28:30,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884060783] [2022-03-15 15:28:30,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:30,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:28:30,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:30,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:28:30,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:28:30,824 INFO L87 Difference]: Start difference. First operand 8090 states and 29596 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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) [2022-03-15 15:28:32,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:32,321 INFO L93 Difference]: Finished difference Result 12974 states and 43200 transitions. [2022-03-15 15:28:32,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-15 15:28:32,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:32,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:32,355 INFO L225 Difference]: With dead ends: 12974 [2022-03-15 15:28:32,355 INFO L226 Difference]: Without dead ends: 12962 [2022-03-15 15:28:32,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5226 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3102, Invalid=9330, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 15:28:32,357 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 627 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:32,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 355 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:32,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12962 states. [2022-03-15 15:28:32,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12962 to 7898. [2022-03-15 15:28:32,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7898 states, 7897 states have (on average 3.6521463847030518) internal successors, (28841), 7897 states have internal predecessors, (28841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7898 states to 7898 states and 28841 transitions. [2022-03-15 15:28:32,600 INFO L78 Accepts]: Start accepts. Automaton has 7898 states and 28841 transitions. Word has length 25 [2022-03-15 15:28:32,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:32,600 INFO L470 AbstractCegarLoop]: Abstraction has 7898 states and 28841 transitions. [2022-03-15 15:28:32,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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) [2022-03-15 15:28:32,600 INFO L276 IsEmpty]: Start isEmpty. Operand 7898 states and 28841 transitions. [2022-03-15 15:28:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:32,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:32,615 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:32,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:32,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:32,830 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:32,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1214287472, now seen corresponding path program 31 times [2022-03-15 15:28:32,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:32,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334323268] [2022-03-15 15:28:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:32,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:32,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:32,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334323268] [2022-03-15 15:28:32,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334323268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:32,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580574828] [2022-03-15 15:28:32,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:28:32,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:32,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:32,864 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:32,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 15:28:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:32,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:28:32,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:32,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:32,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580574828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:32,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:32,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-03-15 15:28:32,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974579639] [2022-03-15 15:28:32,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:32,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 15:28:32,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:32,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 15:28:32,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-15 15:28:32,992 INFO L87 Difference]: Start difference. First operand 7898 states and 28841 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:33,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:33,156 INFO L93 Difference]: Finished difference Result 10133 states and 35170 transitions. [2022-03-15 15:28:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:28:33,156 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:33,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:33,179 INFO L225 Difference]: With dead ends: 10133 [2022-03-15 15:28:33,179 INFO L226 Difference]: Without dead ends: 10125 [2022-03-15 15:28:33,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:28:33,180 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:33,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 96 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:28:33,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10125 states. [2022-03-15 15:28:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10125 to 7507. [2022-03-15 15:28:33,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7507 states, 7506 states have (on average 3.642685851318945) internal successors, (27342), 7506 states have internal predecessors, (27342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7507 states to 7507 states and 27342 transitions. [2022-03-15 15:28:33,338 INFO L78 Accepts]: Start accepts. Automaton has 7507 states and 27342 transitions. Word has length 25 [2022-03-15 15:28:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:33,338 INFO L470 AbstractCegarLoop]: Abstraction has 7507 states and 27342 transitions. [2022-03-15 15:28:33,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:33,339 INFO L276 IsEmpty]: Start isEmpty. Operand 7507 states and 27342 transitions. [2022-03-15 15:28:33,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:33,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:33,355 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:33,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:33,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:33,571 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:33,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:33,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1146236264, now seen corresponding path program 32 times [2022-03-15 15:28:33,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:33,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967177127] [2022-03-15 15:28:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:33,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:33,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:33,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967177127] [2022-03-15 15:28:33,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967177127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:33,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56097602] [2022-03-15 15:28:33,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:28:33,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:33,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:33,636 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:33,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 15:28:33,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:28:33,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:33,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:33,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:33,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:33,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56097602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:33,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:33,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-03-15 15:28:33,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547360930] [2022-03-15 15:28:33,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:33,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:28:33,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:33,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:28:33,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:28:33,891 INFO L87 Difference]: Start difference. First operand 7507 states and 27342 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:35,396 INFO L93 Difference]: Finished difference Result 16117 states and 55172 transitions. [2022-03-15 15:28:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-15 15:28:35,396 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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 25 [2022-03-15 15:28:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:35,434 INFO L225 Difference]: With dead ends: 16117 [2022-03-15 15:28:35,435 INFO L226 Difference]: Without dead ends: 16117 [2022-03-15 15:28:35,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4013 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2608, Invalid=8104, Unknown=0, NotChecked=0, Total=10712 [2022-03-15 15:28:35,439 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 526 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:35,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 277 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:28:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16117 states. [2022-03-15 15:28:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16117 to 8358. [2022-03-15 15:28:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8358 states, 8357 states have (on average 3.7146105061624985) internal successors, (31043), 8357 states have internal predecessors, (31043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8358 states to 8358 states and 31043 transitions. [2022-03-15 15:28:35,662 INFO L78 Accepts]: Start accepts. Automaton has 8358 states and 31043 transitions. Word has length 25 [2022-03-15 15:28:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:35,662 INFO L470 AbstractCegarLoop]: Abstraction has 8358 states and 31043 transitions. [2022-03-15 15:28:35,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 8358 states and 31043 transitions. [2022-03-15 15:28:35,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:35,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:35,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:35,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:35,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 15:28:35,892 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:35,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:35,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2112049308, now seen corresponding path program 33 times [2022-03-15 15:28:35,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:35,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885713002] [2022-03-15 15:28:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:35,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:35,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:35,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885713002] [2022-03-15 15:28:35,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885713002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:35,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331192126] [2022-03-15 15:28:35,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:28:35,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:35,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:35,944 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:35,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 15:28:35,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 15:28:35,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:35,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:35,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:36,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:36,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331192126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:36,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:36,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-03-15 15:28:36,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933243062] [2022-03-15 15:28:36,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:36,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:28:36,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:36,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:28:36,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:28:36,229 INFO L87 Difference]: Start difference. First operand 8358 states and 31043 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:37,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:37,828 INFO L93 Difference]: Finished difference Result 15503 states and 53080 transitions. [2022-03-15 15:28:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 15:28:37,828 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:37,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:37,867 INFO L225 Difference]: With dead ends: 15503 [2022-03-15 15:28:37,867 INFO L226 Difference]: Without dead ends: 15491 [2022-03-15 15:28:37,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2406 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1859, Invalid=5113, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 15:28:37,868 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 534 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:37,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 267 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:28:37,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15491 states. [2022-03-15 15:28:38,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15491 to 8184. [2022-03-15 15:28:38,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8184 states, 8183 states have (on average 3.682756935109373) internal successors, (30136), 8183 states have internal predecessors, (30136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8184 states to 8184 states and 30136 transitions. [2022-03-15 15:28:38,084 INFO L78 Accepts]: Start accepts. Automaton has 8184 states and 30136 transitions. Word has length 25 [2022-03-15 15:28:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:38,085 INFO L470 AbstractCegarLoop]: Abstraction has 8184 states and 30136 transitions. [2022-03-15 15:28:38,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:38,085 INFO L276 IsEmpty]: Start isEmpty. Operand 8184 states and 30136 transitions. [2022-03-15 15:28:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:38,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:38,099 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:38,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:38,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:38,314 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:38,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:38,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1678098526, now seen corresponding path program 34 times [2022-03-15 15:28:38,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:38,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12432079] [2022-03-15 15:28:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:38,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:38,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:38,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12432079] [2022-03-15 15:28:38,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12432079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:38,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137065143] [2022-03-15 15:28:38,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:28:38,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:38,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:38,359 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:38,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 15:28:38,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:28:38,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:38,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:28:38,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:28:38,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:28:38,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137065143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:38,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:38,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-15 15:28:38,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948784152] [2022-03-15 15:28:38,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:38,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:28:38,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:38,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:28:38,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:28:38,515 INFO L87 Difference]: Start difference. First operand 8184 states and 30136 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:38,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:38,854 INFO L93 Difference]: Finished difference Result 19877 states and 69697 transitions. [2022-03-15 15:28:38,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:28:38,854 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:38,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:38,903 INFO L225 Difference]: With dead ends: 19877 [2022-03-15 15:28:38,903 INFO L226 Difference]: Without dead ends: 19877 [2022-03-15 15:28:38,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:28:38,903 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:38,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 133 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:28:38,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19877 states. [2022-03-15 15:28:39,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19877 to 12617. [2022-03-15 15:28:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12617 states, 12616 states have (on average 3.797717184527584) internal successors, (47912), 12616 states have internal predecessors, (47912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12617 states to 12617 states and 47912 transitions. [2022-03-15 15:28:39,254 INFO L78 Accepts]: Start accepts. Automaton has 12617 states and 47912 transitions. Word has length 25 [2022-03-15 15:28:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:39,254 INFO L470 AbstractCegarLoop]: Abstraction has 12617 states and 47912 transitions. [2022-03-15 15:28:39,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 12617 states and 47912 transitions. [2022-03-15 15:28:39,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:39,277 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:39,277 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:39,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-15 15:28:39,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:39,491 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:39,492 INFO L85 PathProgramCache]: Analyzing trace with hash -158041622, now seen corresponding path program 35 times [2022-03-15 15:28:39,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:39,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492010131] [2022-03-15 15:28:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:39,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:28:39,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:39,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492010131] [2022-03-15 15:28:39,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492010131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:39,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832619377] [2022-03-15 15:28:39,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:28:39,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:39,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:39,529 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:39,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 15:28:39,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 15:28:39,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:39,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:28:39,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:28:39,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:28:39,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832619377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:39,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:39,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-03-15 15:28:39,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400368054] [2022-03-15 15:28:39,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:39,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 15:28:39,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:39,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 15:28:39,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-15 15:28:39,687 INFO L87 Difference]: Start difference. First operand 12617 states and 47912 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:39,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:39,941 INFO L93 Difference]: Finished difference Result 16989 states and 60544 transitions. [2022-03-15 15:28:39,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:28:39,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:39,980 INFO L225 Difference]: With dead ends: 16989 [2022-03-15 15:28:39,980 INFO L226 Difference]: Without dead ends: 16975 [2022-03-15 15:28:39,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:28:39,981 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 240 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:39,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 77 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:28:39,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16975 states. [2022-03-15 15:28:40,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16975 to 11442. [2022-03-15 15:28:40,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11442 states, 11441 states have (on average 3.776942574949742) internal successors, (43212), 11441 states have internal predecessors, (43212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11442 states to 11442 states and 43212 transitions. [2022-03-15 15:28:40,358 INFO L78 Accepts]: Start accepts. Automaton has 11442 states and 43212 transitions. Word has length 25 [2022-03-15 15:28:40,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:40,358 INFO L470 AbstractCegarLoop]: Abstraction has 11442 states and 43212 transitions. [2022-03-15 15:28:40,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:40,358 INFO L276 IsEmpty]: Start isEmpty. Operand 11442 states and 43212 transitions. [2022-03-15 15:28:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:40,379 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:40,379 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:40,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:40,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-15 15:28:40,595 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:40,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1325093316, now seen corresponding path program 36 times [2022-03-15 15:28:40,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:40,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384400588] [2022-03-15 15:28:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:40,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:40,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:40,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384400588] [2022-03-15 15:28:40,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384400588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:40,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057672704] [2022-03-15 15:28:40,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:28:40,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:40,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:40,630 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:40,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 15:28:40,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 15:28:40,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:40,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:28:40,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:40,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:40,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057672704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:40,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:40,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-03-15 15:28:40,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848306979] [2022-03-15 15:28:40,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:40,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:28:40,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:40,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:28:40,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:28:40,769 INFO L87 Difference]: Start difference. First operand 11442 states and 43212 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:41,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:41,065 INFO L93 Difference]: Finished difference Result 15660 states and 55413 transitions. [2022-03-15 15:28:41,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:28:41,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:41,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:41,106 INFO L225 Difference]: With dead ends: 15660 [2022-03-15 15:28:41,107 INFO L226 Difference]: Without dead ends: 15638 [2022-03-15 15:28:41,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:28:41,108 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 282 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:41,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 86 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:28:41,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15638 states. [2022-03-15 15:28:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15638 to 11012. [2022-03-15 15:28:41,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11012 states, 11011 states have (on average 3.757606030333303) internal successors, (41375), 11011 states have internal predecessors, (41375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11012 states to 11012 states and 41375 transitions. [2022-03-15 15:28:41,380 INFO L78 Accepts]: Start accepts. Automaton has 11012 states and 41375 transitions. Word has length 25 [2022-03-15 15:28:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:41,380 INFO L470 AbstractCegarLoop]: Abstraction has 11012 states and 41375 transitions. [2022-03-15 15:28:41,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 11012 states and 41375 transitions. [2022-03-15 15:28:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:41,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:41,403 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:41,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:41,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:41,603 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:41,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:41,603 INFO L85 PathProgramCache]: Analyzing trace with hash 347211234, now seen corresponding path program 37 times [2022-03-15 15:28:41,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:41,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904552000] [2022-03-15 15:28:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:41,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:41,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:41,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904552000] [2022-03-15 15:28:41,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904552000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:41,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385636215] [2022-03-15 15:28:41,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:28:41,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:41,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:41,658 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:41,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 15:28:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:41,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:41,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:41,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:28:41,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385636215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:41,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:41,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-03-15 15:28:41,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875911353] [2022-03-15 15:28:41,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:41,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:28:41,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:41,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:28:41,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:28:41,937 INFO L87 Difference]: Start difference. First operand 11012 states and 41375 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:43,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:43,515 INFO L93 Difference]: Finished difference Result 15192 states and 53704 transitions. [2022-03-15 15:28:43,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-15 15:28:43,515 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:43,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:43,559 INFO L225 Difference]: With dead ends: 15192 [2022-03-15 15:28:43,559 INFO L226 Difference]: Without dead ends: 15192 [2022-03-15 15:28:43,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3636 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2098, Invalid=7802, Unknown=0, NotChecked=0, Total=9900 [2022-03-15 15:28:43,560 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 373 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:43,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 236 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:28:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15192 states. [2022-03-15 15:28:43,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15192 to 11138. [2022-03-15 15:28:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11138 states, 11137 states have (on average 3.764658346053695) internal successors, (41927), 11137 states have internal predecessors, (41927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11138 states to 11138 states and 41927 transitions. [2022-03-15 15:28:43,849 INFO L78 Accepts]: Start accepts. Automaton has 11138 states and 41927 transitions. Word has length 25 [2022-03-15 15:28:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:43,849 INFO L470 AbstractCegarLoop]: Abstraction has 11138 states and 41927 transitions. [2022-03-15 15:28:43,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 11138 states and 41927 transitions. [2022-03-15 15:28:43,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:43,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:43,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:43,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-15 15:28:44,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-15 15:28:44,074 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:44,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:44,074 INFO L85 PathProgramCache]: Analyzing trace with hash 220335586, now seen corresponding path program 38 times [2022-03-15 15:28:44,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:44,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283367764] [2022-03-15 15:28:44,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:44,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:44,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:44,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283367764] [2022-03-15 15:28:44,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283367764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:44,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846864120] [2022-03-15 15:28:44,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:28:44,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:44,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:44,126 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:44,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 15:28:44,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:28:44,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:44,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:44,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:44,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:28:44,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846864120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:44,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:44,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-03-15 15:28:44,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083235206] [2022-03-15 15:28:44,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:44,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:28:44,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:44,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:28:44,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:28:44,354 INFO L87 Difference]: Start difference. First operand 11138 states and 41927 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:45,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:45,437 INFO L93 Difference]: Finished difference Result 13833 states and 49529 transitions. [2022-03-15 15:28:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 15:28:45,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:45,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:45,473 INFO L225 Difference]: With dead ends: 13833 [2022-03-15 15:28:45,473 INFO L226 Difference]: Without dead ends: 13812 [2022-03-15 15:28:45,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=858, Invalid=2802, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 15:28:45,474 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 399 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:45,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 233 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:28:45,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13812 states. [2022-03-15 15:28:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13812 to 11138. [2022-03-15 15:28:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11138 states, 11137 states have (on average 3.7639400197539734) internal successors, (41919), 11137 states have internal predecessors, (41919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11138 states to 11138 states and 41919 transitions. [2022-03-15 15:28:45,783 INFO L78 Accepts]: Start accepts. Automaton has 11138 states and 41919 transitions. Word has length 25 [2022-03-15 15:28:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:45,783 INFO L470 AbstractCegarLoop]: Abstraction has 11138 states and 41919 transitions. [2022-03-15 15:28:45,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:45,783 INFO L276 IsEmpty]: Start isEmpty. Operand 11138 states and 41919 transitions. [2022-03-15 15:28:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:45,805 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:45,805 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:45,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:46,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-15 15:28:46,022 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:46,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1493691874, now seen corresponding path program 39 times [2022-03-15 15:28:46,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:46,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918611664] [2022-03-15 15:28:46,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:46,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:46,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:46,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918611664] [2022-03-15 15:28:46,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918611664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:46,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066752796] [2022-03-15 15:28:46,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:28:46,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:46,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:46,065 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:46,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 15:28:46,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:28:46,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:46,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:46,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:46,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:46,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066752796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:46,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:46,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-03-15 15:28:46,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029298597] [2022-03-15 15:28:46,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:46,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:28:46,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:46,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:28:46,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:28:46,323 INFO L87 Difference]: Start difference. First operand 11138 states and 41919 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:47,152 INFO L93 Difference]: Finished difference Result 14424 states and 51191 transitions. [2022-03-15 15:28:47,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 15:28:47,152 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:47,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:47,189 INFO L225 Difference]: With dead ends: 14424 [2022-03-15 15:28:47,189 INFO L226 Difference]: Without dead ends: 14396 [2022-03-15 15:28:47,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=887, Invalid=2895, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 15:28:47,190 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 386 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:47,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 233 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14396 states. [2022-03-15 15:28:47,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14396 to 11195. [2022-03-15 15:28:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11195 states, 11194 states have (on average 3.7634447025192066) internal successors, (42128), 11194 states have internal predecessors, (42128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11195 states to 11195 states and 42128 transitions. [2022-03-15 15:28:47,444 INFO L78 Accepts]: Start accepts. Automaton has 11195 states and 42128 transitions. Word has length 25 [2022-03-15 15:28:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:47,444 INFO L470 AbstractCegarLoop]: Abstraction has 11195 states and 42128 transitions. [2022-03-15 15:28:47,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 11195 states and 42128 transitions. [2022-03-15 15:28:47,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:47,465 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:47,465 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:47,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-15 15:28:47,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:47,667 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:47,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:47,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1696680730, now seen corresponding path program 40 times [2022-03-15 15:28:47,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:47,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743806183] [2022-03-15 15:28:47,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:47,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:47,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:47,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743806183] [2022-03-15 15:28:47,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743806183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:47,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539509621] [2022-03-15 15:28:47,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:28:47,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:47,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:47,720 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:47,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 15:28:47,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:28:47,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:47,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:47,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:47,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:47,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539509621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:47,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:47,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-03-15 15:28:47,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079097678] [2022-03-15 15:28:47,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:47,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:28:47,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:47,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:28:47,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:28:47,956 INFO L87 Difference]: Start difference. First operand 11195 states and 42128 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) [2022-03-15 15:28:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:49,130 INFO L93 Difference]: Finished difference Result 14912 states and 52543 transitions. [2022-03-15 15:28:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 15:28:49,132 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 25 [2022-03-15 15:28:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:49,169 INFO L225 Difference]: With dead ends: 14912 [2022-03-15 15:28:49,170 INFO L226 Difference]: Without dead ends: 14900 [2022-03-15 15:28:49,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1308, Invalid=4392, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 15:28:49,171 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 349 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:49,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 331 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:28:49,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14900 states. [2022-03-15 15:28:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14900 to 11138. [2022-03-15 15:28:49,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11138 states, 11137 states have (on average 3.7660949986531382) internal successors, (41943), 11137 states have internal predecessors, (41943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11138 states to 11138 states and 41943 transitions. [2022-03-15 15:28:49,423 INFO L78 Accepts]: Start accepts. Automaton has 11138 states and 41943 transitions. Word has length 25 [2022-03-15 15:28:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:49,423 INFO L470 AbstractCegarLoop]: Abstraction has 11138 states and 41943 transitions. [2022-03-15 15:28:49,423 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) [2022-03-15 15:28:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 11138 states and 41943 transitions. [2022-03-15 15:28:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:49,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:49,443 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:49,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-15 15:28:49,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:49,656 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:49,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1229977822, now seen corresponding path program 41 times [2022-03-15 15:28:49,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:49,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901954726] [2022-03-15 15:28:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:49,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:49,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:49,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901954726] [2022-03-15 15:28:49,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901954726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:49,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053693746] [2022-03-15 15:28:49,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:28:49,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:49,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:49,695 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:49,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 15:28:49,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:28:49,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:49,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:49,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:49,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:49,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053693746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:49,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:49,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2022-03-15 15:28:49,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468988152] [2022-03-15 15:28:49,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:49,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:28:49,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:28:49,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:28:49,872 INFO L87 Difference]: Start difference. First operand 11138 states and 41943 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:50,516 INFO L93 Difference]: Finished difference Result 14340 states and 51496 transitions. [2022-03-15 15:28:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 15:28:50,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:50,600 INFO L225 Difference]: With dead ends: 14340 [2022-03-15 15:28:50,600 INFO L226 Difference]: Without dead ends: 14277 [2022-03-15 15:28:50,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=683, Invalid=2397, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 15:28:50,601 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 420 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:50,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 203 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14277 states. [2022-03-15 15:28:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14277 to 11984. [2022-03-15 15:28:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11984 states, 11983 states have (on average 3.751397813569223) internal successors, (44953), 11983 states have internal predecessors, (44953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:50,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11984 states to 11984 states and 44953 transitions. [2022-03-15 15:28:50,940 INFO L78 Accepts]: Start accepts. Automaton has 11984 states and 44953 transitions. Word has length 25 [2022-03-15 15:28:50,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:50,940 INFO L470 AbstractCegarLoop]: Abstraction has 11984 states and 44953 transitions. [2022-03-15 15:28:50,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 11984 states and 44953 transitions. [2022-03-15 15:28:50,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:50,961 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:50,961 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:50,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-15 15:28:51,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-15 15:28:51,176 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:51,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:51,177 INFO L85 PathProgramCache]: Analyzing trace with hash 73924450, now seen corresponding path program 42 times [2022-03-15 15:28:51,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:51,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144859295] [2022-03-15 15:28:51,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:51,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:51,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:51,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144859295] [2022-03-15 15:28:51,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144859295] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:51,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709986352] [2022-03-15 15:28:51,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:28:51,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:51,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:51,216 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:51,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 15:28:51,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:28:51,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:51,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:51,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:51,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:51,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709986352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:51,459 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:51,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-03-15 15:28:51,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627981910] [2022-03-15 15:28:51,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:51,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:28:51,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:51,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:28:51,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:28:51,460 INFO L87 Difference]: Start difference. First operand 11984 states and 44953 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:52,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:52,376 INFO L93 Difference]: Finished difference Result 15051 states and 53533 transitions. [2022-03-15 15:28:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 15:28:52,376 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:52,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:52,411 INFO L225 Difference]: With dead ends: 15051 [2022-03-15 15:28:52,411 INFO L226 Difference]: Without dead ends: 15037 [2022-03-15 15:28:52,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 15:28:52,412 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 365 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:52,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 206 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15037 states. [2022-03-15 15:28:52,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15037 to 12440. [2022-03-15 15:28:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12440 states, 12439 states have (on average 3.7323739850470297) internal successors, (46427), 12439 states have internal predecessors, (46427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:52,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12440 states to 12440 states and 46427 transitions. [2022-03-15 15:28:52,658 INFO L78 Accepts]: Start accepts. Automaton has 12440 states and 46427 transitions. Word has length 25 [2022-03-15 15:28:52,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:52,658 INFO L470 AbstractCegarLoop]: Abstraction has 12440 states and 46427 transitions. [2022-03-15 15:28:52,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 12440 states and 46427 transitions. [2022-03-15 15:28:52,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:52,680 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:52,680 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:52,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-15 15:28:52,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-15 15:28:52,894 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:52,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:52,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1178519142, now seen corresponding path program 43 times [2022-03-15 15:28:52,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:52,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720678140] [2022-03-15 15:28:52,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:52,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:52,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:52,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720678140] [2022-03-15 15:28:52,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720678140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:52,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989666888] [2022-03-15 15:28:52,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:28:52,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:52,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:52,932 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:52,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 15:28:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:52,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:52,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:53,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:53,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989666888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:53,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:53,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-03-15 15:28:53,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283008593] [2022-03-15 15:28:53,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:53,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:28:53,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:28:53,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:28:53,210 INFO L87 Difference]: Start difference. First operand 12440 states and 46427 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) [2022-03-15 15:28:54,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:54,369 INFO L93 Difference]: Finished difference Result 15646 states and 55056 transitions. [2022-03-15 15:28:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 15:28:54,369 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 25 [2022-03-15 15:28:54,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:54,408 INFO L225 Difference]: With dead ends: 15646 [2022-03-15 15:28:54,409 INFO L226 Difference]: Without dead ends: 15634 [2022-03-15 15:28:54,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=971, Invalid=3061, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 15:28:54,409 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 352 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:54,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 260 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:28:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15634 states. [2022-03-15 15:28:54,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15634 to 12392. [2022-03-15 15:28:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12392 states, 12391 states have (on average 3.7316600758615124) internal successors, (46239), 12391 states have internal predecessors, (46239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12392 states to 12392 states and 46239 transitions. [2022-03-15 15:28:54,670 INFO L78 Accepts]: Start accepts. Automaton has 12392 states and 46239 transitions. Word has length 25 [2022-03-15 15:28:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:54,670 INFO L470 AbstractCegarLoop]: Abstraction has 12392 states and 46239 transitions. [2022-03-15 15:28:54,670 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) [2022-03-15 15:28:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 12392 states and 46239 transitions. [2022-03-15 15:28:54,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:54,694 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:54,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:54,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:54,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:54,909 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:54,909 INFO L85 PathProgramCache]: Analyzing trace with hash 786211702, now seen corresponding path program 17 times [2022-03-15 15:28:54,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:54,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791413491] [2022-03-15 15:28:54,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:54,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:54,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:54,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791413491] [2022-03-15 15:28:54,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791413491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:54,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120801991] [2022-03-15 15:28:54,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:28:54,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:54,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:54,953 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:54,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 15:28:54,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 15:28:54,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:54,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:28:54,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:55,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:55,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120801991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:55,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:55,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:28:55,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612942801] [2022-03-15 15:28:55,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:55,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:28:55,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:55,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:28:55,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:28:55,133 INFO L87 Difference]: Start difference. First operand 12392 states and 46239 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:56,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:56,266 INFO L93 Difference]: Finished difference Result 15611 states and 55117 transitions. [2022-03-15 15:28:56,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 15:28:56,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:56,305 INFO L225 Difference]: With dead ends: 15611 [2022-03-15 15:28:56,305 INFO L226 Difference]: Without dead ends: 15611 [2022-03-15 15:28:56,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1262, Invalid=3708, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 15:28:56,306 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 378 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:56,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 263 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15611 states. [2022-03-15 15:28:56,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15611 to 12615. [2022-03-15 15:28:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12615 states, 12614 states have (on average 3.7307753289995245) internal successors, (47060), 12614 states have internal predecessors, (47060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12615 states to 12615 states and 47060 transitions. [2022-03-15 15:28:56,646 INFO L78 Accepts]: Start accepts. Automaton has 12615 states and 47060 transitions. Word has length 25 [2022-03-15 15:28:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:56,646 INFO L470 AbstractCegarLoop]: Abstraction has 12615 states and 47060 transitions. [2022-03-15 15:28:56,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:56,646 INFO L276 IsEmpty]: Start isEmpty. Operand 12615 states and 47060 transitions. [2022-03-15 15:28:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:56,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:56,671 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:56,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:56,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:56,886 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:56,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:56,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1098899790, now seen corresponding path program 18 times [2022-03-15 15:28:56,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:56,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110108638] [2022-03-15 15:28:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:56,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:56,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:56,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110108638] [2022-03-15 15:28:56,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110108638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:56,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23443590] [2022-03-15 15:28:56,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:28:56,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:56,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:56,941 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:56,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 15:28:56,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:28:56,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:56,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:28:56,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:57,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:57,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23443590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:57,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:57,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-15 15:28:57,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323782202] [2022-03-15 15:28:57,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:57,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:28:57,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:57,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:28:57,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:28:57,086 INFO L87 Difference]: Start difference. First operand 12615 states and 47060 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:57,968 INFO L93 Difference]: Finished difference Result 38637 states and 135899 transitions. [2022-03-15 15:28:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 15:28:57,969 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:28:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:58,083 INFO L225 Difference]: With dead ends: 38637 [2022-03-15 15:28:58,083 INFO L226 Difference]: Without dead ends: 38575 [2022-03-15 15:28:58,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=3503, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 15:28:58,084 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 498 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:58,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 249 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:58,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38575 states. [2022-03-15 15:28:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38575 to 15744. [2022-03-15 15:28:58,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15744 states, 15743 states have (on average 3.8201740456075717) internal successors, (60141), 15743 states have internal predecessors, (60141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15744 states to 15744 states and 60141 transitions. [2022-03-15 15:28:58,886 INFO L78 Accepts]: Start accepts. Automaton has 15744 states and 60141 transitions. Word has length 25 [2022-03-15 15:28:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:58,886 INFO L470 AbstractCegarLoop]: Abstraction has 15744 states and 60141 transitions. [2022-03-15 15:28:58,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 15744 states and 60141 transitions. [2022-03-15 15:28:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:28:58,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:58,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:58,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:59,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-15 15:28:59,135 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:28:59,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:59,136 INFO L85 PathProgramCache]: Analyzing trace with hash 801359794, now seen corresponding path program 19 times [2022-03-15 15:28:59,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:59,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973545839] [2022-03-15 15:28:59,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:59,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:59,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:59,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973545839] [2022-03-15 15:28:59,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973545839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:59,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374218032] [2022-03-15 15:28:59,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:28:59,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:59,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:59,271 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:59,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 15:28:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:59,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:28:59,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:59,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:59,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374218032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:59,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:59,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-15 15:28:59,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193402487] [2022-03-15 15:28:59,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:59,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:28:59,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:28:59,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:28:59,503 INFO L87 Difference]: Start difference. First operand 15744 states and 60141 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) [2022-03-15 15:29:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:00,675 INFO L93 Difference]: Finished difference Result 48113 states and 167521 transitions. [2022-03-15 15:29:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 15:29:00,675 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 25 [2022-03-15 15:29:00,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:00,841 INFO L225 Difference]: With dead ends: 48113 [2022-03-15 15:29:00,842 INFO L226 Difference]: Without dead ends: 48057 [2022-03-15 15:29:00,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=867, Invalid=2673, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 15:29:00,842 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 365 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:00,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 357 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:29:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48057 states. [2022-03-15 15:29:01,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48057 to 16563. [2022-03-15 15:29:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16563 states, 16562 states have (on average 3.779193334138389) internal successors, (62591), 16562 states have internal predecessors, (62591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16563 states to 16563 states and 62591 transitions. [2022-03-15 15:29:01,681 INFO L78 Accepts]: Start accepts. Automaton has 16563 states and 62591 transitions. Word has length 25 [2022-03-15 15:29:01,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:01,681 INFO L470 AbstractCegarLoop]: Abstraction has 16563 states and 62591 transitions. [2022-03-15 15:29:01,681 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) [2022-03-15 15:29:01,681 INFO L276 IsEmpty]: Start isEmpty. Operand 16563 states and 62591 transitions. [2022-03-15 15:29:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:01,715 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:01,715 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:01,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-15 15:29:01,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:01,931 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:01,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1107594414, now seen corresponding path program 20 times [2022-03-15 15:29:01,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:01,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38221420] [2022-03-15 15:29:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:01,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:02,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:02,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38221420] [2022-03-15 15:29:02,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38221420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:02,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415408521] [2022-03-15 15:29:02,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:29:02,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:02,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:02,070 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:02,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 15:29:02,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:29:02,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:02,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:29:02,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:02,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:02,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415408521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:02,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:02,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2022-03-15 15:29:02,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782224536] [2022-03-15 15:29:02,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:02,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:29:02,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:02,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:29:02,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:29:02,403 INFO L87 Difference]: Start difference. First operand 16563 states and 62591 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:03,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:03,387 INFO L93 Difference]: Finished difference Result 19098 states and 69360 transitions. [2022-03-15 15:29:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 15:29:03,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:03,443 INFO L225 Difference]: With dead ends: 19098 [2022-03-15 15:29:03,444 INFO L226 Difference]: Without dead ends: 19063 [2022-03-15 15:29:03,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=951, Invalid=3081, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 15:29:03,444 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 374 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:03,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 221 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:29:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19063 states. [2022-03-15 15:29:03,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19063 to 16487. [2022-03-15 15:29:03,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16487 states, 16486 states have (on average 3.782057503336164) internal successors, (62351), 16486 states have internal predecessors, (62351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:03,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16487 states to 16487 states and 62351 transitions. [2022-03-15 15:29:03,825 INFO L78 Accepts]: Start accepts. Automaton has 16487 states and 62351 transitions. Word has length 25 [2022-03-15 15:29:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:03,825 INFO L470 AbstractCegarLoop]: Abstraction has 16487 states and 62351 transitions. [2022-03-15 15:29:03,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 16487 states and 62351 transitions. [2022-03-15 15:29:03,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:03,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:03,856 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:03,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:04,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:04,067 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:04,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1643761502, now seen corresponding path program 21 times [2022-03-15 15:29:04,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:04,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268307091] [2022-03-15 15:29:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:04,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:29:04,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:04,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268307091] [2022-03-15 15:29:04,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268307091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:04,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703037885] [2022-03-15 15:29:04,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:29:04,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:04,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:04,135 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:04,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:29:04,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:04,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:29:04,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:04,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 15:29:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:04,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:29:04,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703037885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:04,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:04,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2022-03-15 15:29:04,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615169123] [2022-03-15 15:29:04,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:04,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:29:04,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:04,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:29:04,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:29:04,396 INFO L87 Difference]: Start difference. First operand 16487 states and 62351 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:05,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:05,451 INFO L93 Difference]: Finished difference Result 19001 states and 69178 transitions. [2022-03-15 15:29:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 15:29:05,451 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:05,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:05,504 INFO L225 Difference]: With dead ends: 19001 [2022-03-15 15:29:05,504 INFO L226 Difference]: Without dead ends: 18959 [2022-03-15 15:29:05,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 15:29:05,505 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 299 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:05,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 279 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:29:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18959 states. [2022-03-15 15:29:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18959 to 16471. [2022-03-15 15:29:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16471 states, 16470 states have (on average 3.7820886460230723) internal successors, (62291), 16470 states have internal predecessors, (62291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16471 states to 16471 states and 62291 transitions. [2022-03-15 15:29:05,984 INFO L78 Accepts]: Start accepts. Automaton has 16471 states and 62291 transitions. Word has length 25 [2022-03-15 15:29:05,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:05,984 INFO L470 AbstractCegarLoop]: Abstraction has 16471 states and 62291 transitions. [2022-03-15 15:29:05,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:05,984 INFO L276 IsEmpty]: Start isEmpty. Operand 16471 states and 62291 transitions. [2022-03-15 15:29:06,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:06,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:06,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:06,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:06,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:06,235 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:06,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1360200822, now seen corresponding path program 22 times [2022-03-15 15:29:06,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:06,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350863823] [2022-03-15 15:29:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:06,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:06,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:06,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350863823] [2022-03-15 15:29:06,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350863823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:06,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967472891] [2022-03-15 15:29:06,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:29:06,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:06,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:06,294 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:06,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 15:29:06,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:29:06,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:06,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:29:06,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:06,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:06,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967472891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:06,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:06,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-15 15:29:06,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245348027] [2022-03-15 15:29:06,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:06,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:29:06,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:06,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:29:06,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:29:06,493 INFO L87 Difference]: Start difference. First operand 16471 states and 62291 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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) [2022-03-15 15:29:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:07,475 INFO L93 Difference]: Finished difference Result 28929 states and 102768 transitions. [2022-03-15 15:29:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 15:29:07,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:07,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:07,559 INFO L225 Difference]: With dead ends: 28929 [2022-03-15 15:29:07,559 INFO L226 Difference]: Without dead ends: 28845 [2022-03-15 15:29:07,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=523, Invalid=1927, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 15:29:07,560 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 272 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:07,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 187 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:29:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28845 states. [2022-03-15 15:29:07,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28845 to 16976. [2022-03-15 15:29:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16976 states, 16975 states have (on average 3.786215022091311) internal successors, (64271), 16975 states have internal predecessors, (64271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16976 states to 16976 states and 64271 transitions. [2022-03-15 15:29:08,054 INFO L78 Accepts]: Start accepts. Automaton has 16976 states and 64271 transitions. Word has length 25 [2022-03-15 15:29:08,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:08,054 INFO L470 AbstractCegarLoop]: Abstraction has 16976 states and 64271 transitions. [2022-03-15 15:29:08,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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) [2022-03-15 15:29:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand 16976 states and 64271 transitions. [2022-03-15 15:29:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:08,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:08,089 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:08,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-15 15:29:08,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-03-15 15:29:08,304 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:08,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:08,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1101811746, now seen corresponding path program 23 times [2022-03-15 15:29:08,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:08,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473252893] [2022-03-15 15:29:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:08,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:08,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:08,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473252893] [2022-03-15 15:29:08,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473252893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:08,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628756982] [2022-03-15 15:29:08,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:29:08,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:08,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:08,352 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:08,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 15:29:08,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:29:08,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:08,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:29:08,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:08,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:08,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628756982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:08,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:08,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:29:08,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330054779] [2022-03-15 15:29:08,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:08,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:29:08,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:08,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:29:08,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:29:08,614 INFO L87 Difference]: Start difference. First operand 16976 states and 64271 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) [2022-03-15 15:29:09,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:09,800 INFO L93 Difference]: Finished difference Result 20172 states and 73083 transitions. [2022-03-15 15:29:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 15:29:09,800 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 25 [2022-03-15 15:29:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:09,865 INFO L225 Difference]: With dead ends: 20172 [2022-03-15 15:29:09,865 INFO L226 Difference]: Without dead ends: 20094 [2022-03-15 15:29:09,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=925, Invalid=3631, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 15:29:09,866 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 301 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:09,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 412 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:29:09,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20094 states. [2022-03-15 15:29:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20094 to 17422. [2022-03-15 15:29:10,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17422 states, 17421 states have (on average 3.769818035704035) internal successors, (65674), 17421 states have internal predecessors, (65674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17422 states to 17422 states and 65674 transitions. [2022-03-15 15:29:10,368 INFO L78 Accepts]: Start accepts. Automaton has 17422 states and 65674 transitions. Word has length 25 [2022-03-15 15:29:10,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:10,368 INFO L470 AbstractCegarLoop]: Abstraction has 17422 states and 65674 transitions. [2022-03-15 15:29:10,368 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) [2022-03-15 15:29:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 17422 states and 65674 transitions. [2022-03-15 15:29:10,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:10,401 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:10,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:10,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:10,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-15 15:29:10,616 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:10,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:10,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1500037906, now seen corresponding path program 24 times [2022-03-15 15:29:10,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:10,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994117480] [2022-03-15 15:29:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:10,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:10,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:10,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994117480] [2022-03-15 15:29:10,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994117480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:10,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043593879] [2022-03-15 15:29:10,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:29:10,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:10,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:10,653 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:10,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 15:29:10,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:29:10,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:10,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:29:10,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:10,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:10,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043593879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:10,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:10,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:29:10,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525058689] [2022-03-15 15:29:10,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:10,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:29:10,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:10,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:29:10,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:29:10,894 INFO L87 Difference]: Start difference. First operand 17422 states and 65674 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) [2022-03-15 15:29:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:11,845 INFO L93 Difference]: Finished difference Result 34778 states and 124552 transitions. [2022-03-15 15:29:11,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 15:29:11,845 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 25 [2022-03-15 15:29:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:11,967 INFO L225 Difference]: With dead ends: 34778 [2022-03-15 15:29:11,967 INFO L226 Difference]: Without dead ends: 34701 [2022-03-15 15:29:11,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:29:11,968 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 250 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:11,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 256 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:29:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34701 states. [2022-03-15 15:29:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34701 to 17827. [2022-03-15 15:29:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17827 states, 17826 states have (on average 3.773869628632335) internal successors, (67273), 17826 states have internal predecessors, (67273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17827 states to 17827 states and 67273 transitions. [2022-03-15 15:29:12,690 INFO L78 Accepts]: Start accepts. Automaton has 17827 states and 67273 transitions. Word has length 25 [2022-03-15 15:29:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:12,690 INFO L470 AbstractCegarLoop]: Abstraction has 17827 states and 67273 transitions. [2022-03-15 15:29:12,690 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) [2022-03-15 15:29:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand 17827 states and 67273 transitions. [2022-03-15 15:29:12,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:12,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:12,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:12,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:12,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-15 15:29:12,943 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:12,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1114485558, now seen corresponding path program 25 times [2022-03-15 15:29:12,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:12,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386887718] [2022-03-15 15:29:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:12,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:12,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:12,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386887718] [2022-03-15 15:29:12,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386887718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:12,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395969870] [2022-03-15 15:29:12,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:29:12,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:12,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:12,992 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:13,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:29:13,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:13,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 15:29:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:13,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:13,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395969870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:13,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:13,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:29:13,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784027754] [2022-03-15 15:29:13,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:13,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:29:13,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:13,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:29:13,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:29:13,277 INFO L87 Difference]: Start difference. First operand 17827 states and 67273 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) [2022-03-15 15:29:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:15,232 INFO L93 Difference]: Finished difference Result 35331 states and 124349 transitions. [2022-03-15 15:29:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 15:29:15,232 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 25 [2022-03-15 15:29:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:15,349 INFO L225 Difference]: With dead ends: 35331 [2022-03-15 15:29:15,349 INFO L226 Difference]: Without dead ends: 35205 [2022-03-15 15:29:15,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1474, Invalid=5006, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 15:29:15,350 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 317 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:15,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 439 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 15:29:15,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35205 states. [2022-03-15 15:29:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35205 to 18164. [2022-03-15 15:29:15,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18164 states, 18163 states have (on average 3.7771843858393437) internal successors, (68605), 18163 states have internal predecessors, (68605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18164 states to 18164 states and 68605 transitions. [2022-03-15 15:29:15,951 INFO L78 Accepts]: Start accepts. Automaton has 18164 states and 68605 transitions. Word has length 25 [2022-03-15 15:29:15,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:15,951 INFO L470 AbstractCegarLoop]: Abstraction has 18164 states and 68605 transitions. [2022-03-15 15:29:15,951 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) [2022-03-15 15:29:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 18164 states and 68605 transitions. [2022-03-15 15:29:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:15,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:15,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:16,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-15 15:29:16,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-15 15:29:16,205 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:16,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1979778250, now seen corresponding path program 26 times [2022-03-15 15:29:16,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:16,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72096586] [2022-03-15 15:29:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:16,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:16,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:16,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72096586] [2022-03-15 15:29:16,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72096586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:16,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605895563] [2022-03-15 15:29:16,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:29:16,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:16,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:16,245 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:16,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 15:29:16,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:29:16,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:16,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:29:16,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:16,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:16,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605895563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:16,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:16,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:29:16,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77301260] [2022-03-15 15:29:16,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:16,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:29:16,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:16,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:29:16,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:29:16,477 INFO L87 Difference]: Start difference. First operand 18164 states and 68605 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) [2022-03-15 15:29:17,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:17,701 INFO L93 Difference]: Finished difference Result 38580 states and 136606 transitions. [2022-03-15 15:29:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 15:29:17,701 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 25 [2022-03-15 15:29:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:17,849 INFO L225 Difference]: With dead ends: 38580 [2022-03-15 15:29:17,850 INFO L226 Difference]: Without dead ends: 38566 [2022-03-15 15:29:17,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1329, Invalid=4073, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 15:29:17,851 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 390 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:17,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 439 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:29:17,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38566 states. [2022-03-15 15:29:18,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38566 to 21322. [2022-03-15 15:29:18,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21322 states, 21321 states have (on average 3.8229445147976175) internal successors, (81509), 21321 states have internal predecessors, (81509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21322 states to 21322 states and 81509 transitions. [2022-03-15 15:29:18,790 INFO L78 Accepts]: Start accepts. Automaton has 21322 states and 81509 transitions. Word has length 25 [2022-03-15 15:29:18,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:18,790 INFO L470 AbstractCegarLoop]: Abstraction has 21322 states and 81509 transitions. [2022-03-15 15:29:18,791 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) [2022-03-15 15:29:18,791 INFO L276 IsEmpty]: Start isEmpty. Operand 21322 states and 81509 transitions. [2022-03-15 15:29:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:18,840 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:18,840 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:18,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-15 15:29:19,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:19,055 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:19,056 INFO L85 PathProgramCache]: Analyzing trace with hash 807588790, now seen corresponding path program 27 times [2022-03-15 15:29:19,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:19,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108581349] [2022-03-15 15:29:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:19,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:19,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:19,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108581349] [2022-03-15 15:29:19,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108581349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:19,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326038018] [2022-03-15 15:29:19,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:29:19,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:19,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:19,096 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:19,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 15:29:19,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:29:19,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:19,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:29:19,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:19,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:19,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326038018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:19,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:19,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2022-03-15 15:29:19,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474360695] [2022-03-15 15:29:19,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:19,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:29:19,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:19,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:29:19,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:29:19,341 INFO L87 Difference]: Start difference. First operand 21322 states and 81509 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:20,088 INFO L93 Difference]: Finished difference Result 24183 states and 89452 transitions. [2022-03-15 15:29:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 15:29:20,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:20,159 INFO L225 Difference]: With dead ends: 24183 [2022-03-15 15:29:20,160 INFO L226 Difference]: Without dead ends: 24175 [2022-03-15 15:29:20,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=859, Invalid=2681, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 15:29:20,160 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 292 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:20,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 259 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:29:20,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24175 states. [2022-03-15 15:29:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24175 to 21580. [2022-03-15 15:29:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21580 states, 21579 states have (on average 3.812780944436721) internal successors, (82276), 21579 states have internal predecessors, (82276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21580 states to 21580 states and 82276 transitions. [2022-03-15 15:29:20,899 INFO L78 Accepts]: Start accepts. Automaton has 21580 states and 82276 transitions. Word has length 25 [2022-03-15 15:29:20,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:20,899 INFO L470 AbstractCegarLoop]: Abstraction has 21580 states and 82276 transitions. [2022-03-15 15:29:20,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:20,899 INFO L276 IsEmpty]: Start isEmpty. Operand 21580 states and 82276 transitions. [2022-03-15 15:29:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:21,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:21,122 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:21,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:21,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:21,338 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:21,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:21,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1255847150, now seen corresponding path program 28 times [2022-03-15 15:29:21,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:21,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091977506] [2022-03-15 15:29:21,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:21,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:21,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:21,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091977506] [2022-03-15 15:29:21,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091977506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:21,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627503441] [2022-03-15 15:29:21,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:29:21,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:21,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:21,389 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:21,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 15:29:21,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:29:21,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:21,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:29:21,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:21,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:21,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627503441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:21,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:21,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2022-03-15 15:29:21,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201902743] [2022-03-15 15:29:21,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:21,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:29:21,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:21,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:29:21,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:29:21,633 INFO L87 Difference]: Start difference. First operand 21580 states and 82276 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:22,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:22,893 INFO L93 Difference]: Finished difference Result 25283 states and 92457 transitions. [2022-03-15 15:29:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 15:29:22,893 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:22,972 INFO L225 Difference]: With dead ends: 25283 [2022-03-15 15:29:22,972 INFO L226 Difference]: Without dead ends: 25275 [2022-03-15 15:29:22,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1403, Invalid=4917, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 15:29:22,973 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 393 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:22,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 251 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:29:22,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25275 states. [2022-03-15 15:29:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25275 to 21934. [2022-03-15 15:29:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21934 states, 21933 states have (on average 3.803902794875302) internal successors, (83431), 21933 states have internal predecessors, (83431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21934 states to 21934 states and 83431 transitions. [2022-03-15 15:29:23,564 INFO L78 Accepts]: Start accepts. Automaton has 21934 states and 83431 transitions. Word has length 25 [2022-03-15 15:29:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:23,564 INFO L470 AbstractCegarLoop]: Abstraction has 21934 states and 83431 transitions. [2022-03-15 15:29:23,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 21934 states and 83431 transitions. [2022-03-15 15:29:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:23,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:23,608 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:23,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-15 15:29:23,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:23,824 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:23,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:23,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1128971502, now seen corresponding path program 29 times [2022-03-15 15:29:23,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:23,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139506019] [2022-03-15 15:29:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:23,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:23,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:23,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139506019] [2022-03-15 15:29:23,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139506019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:23,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307029505] [2022-03-15 15:29:23,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:29:23,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:23,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:23,880 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:23,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 15:29:23,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:29:23,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:23,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:29:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:24,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:24,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307029505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:24,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:24,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2022-03-15 15:29:24,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854822991] [2022-03-15 15:29:24,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:24,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:29:24,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:24,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:29:24,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:29:24,121 INFO L87 Difference]: Start difference. First operand 21934 states and 83431 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:25,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:25,284 INFO L93 Difference]: Finished difference Result 24656 states and 90778 transitions. [2022-03-15 15:29:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 15:29:25,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:25,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:25,359 INFO L225 Difference]: With dead ends: 24656 [2022-03-15 15:29:25,359 INFO L226 Difference]: Without dead ends: 24628 [2022-03-15 15:29:25,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=824, Invalid=2958, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 15:29:25,359 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 415 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:25,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 223 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:29:25,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24628 states. [2022-03-15 15:29:25,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24628 to 21762. [2022-03-15 15:29:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21762 states, 21761 states have (on average 3.806580579936584) internal successors, (82835), 21761 states have internal predecessors, (82835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:26,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21762 states to 21762 states and 82835 transitions. [2022-03-15 15:29:26,110 INFO L78 Accepts]: Start accepts. Automaton has 21762 states and 82835 transitions. Word has length 25 [2022-03-15 15:29:26,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:26,110 INFO L470 AbstractCegarLoop]: Abstraction has 21762 states and 82835 transitions. [2022-03-15 15:29:26,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:26,110 INFO L276 IsEmpty]: Start isEmpty. Operand 21762 states and 82835 transitions. [2022-03-15 15:29:26,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:26,151 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:26,151 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:26,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:26,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:26,366 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:26,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:26,367 INFO L85 PathProgramCache]: Analyzing trace with hash -251363790, now seen corresponding path program 30 times [2022-03-15 15:29:26,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:26,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910764403] [2022-03-15 15:29:26,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:26,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:26,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:26,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910764403] [2022-03-15 15:29:26,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910764403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:26,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611236462] [2022-03-15 15:29:26,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:29:26,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:26,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:26,409 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:26,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 15:29:26,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:29:26,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:26,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:29:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:26,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:26,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611236462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:26,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:26,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 15:29:26,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631713575] [2022-03-15 15:29:26,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:26,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:29:26,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:26,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:29:26,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:29:26,655 INFO L87 Difference]: Start difference. First operand 21762 states and 82835 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:28,442 INFO L93 Difference]: Finished difference Result 31351 states and 113770 transitions. [2022-03-15 15:29:28,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 15:29:28,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:28,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:28,545 INFO L225 Difference]: With dead ends: 31351 [2022-03-15 15:29:28,545 INFO L226 Difference]: Without dead ends: 31343 [2022-03-15 15:29:28,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2370 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1734, Invalid=5406, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 15:29:28,545 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 377 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:28,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 277 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:29:28,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31343 states. [2022-03-15 15:29:29,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31343 to 21682. [2022-03-15 15:29:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21682 states, 21681 states have (on average 3.808726534753932) internal successors, (82577), 21681 states have internal predecessors, (82577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21682 states to 21682 states and 82577 transitions. [2022-03-15 15:29:29,190 INFO L78 Accepts]: Start accepts. Automaton has 21682 states and 82577 transitions. Word has length 25 [2022-03-15 15:29:29,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:29,191 INFO L470 AbstractCegarLoop]: Abstraction has 21682 states and 82577 transitions. [2022-03-15 15:29:29,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:29,191 INFO L276 IsEmpty]: Start isEmpty. Operand 21682 states and 82577 transitions. [2022-03-15 15:29:29,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:29,238 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:29,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:29,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:29,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:29,453 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:29,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:29,453 INFO L85 PathProgramCache]: Analyzing trace with hash 195247086, now seen corresponding path program 31 times [2022-03-15 15:29:29,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:29,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870902473] [2022-03-15 15:29:29,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:29,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:29,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:29,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870902473] [2022-03-15 15:29:29,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870902473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:29,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146031869] [2022-03-15 15:29:29,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:29:29,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:29,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:29,490 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:29,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 15:29:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:29,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:29:29,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:29,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:29,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146031869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:29,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:29,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:29:29,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316232665] [2022-03-15 15:29:29,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:29,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:29:29,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:29,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:29:29,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:29:29,752 INFO L87 Difference]: Start difference. First operand 21682 states and 82577 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:31,113 INFO L93 Difference]: Finished difference Result 32460 states and 116584 transitions. [2022-03-15 15:29:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 15:29:31,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:31,239 INFO L225 Difference]: With dead ends: 32460 [2022-03-15 15:29:31,239 INFO L226 Difference]: Without dead ends: 32406 [2022-03-15 15:29:31,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=966, Invalid=3456, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 15:29:31,240 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 366 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:31,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 243 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:29:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32406 states. [2022-03-15 15:29:31,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32406 to 17305. [2022-03-15 15:29:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17305 states, 17304 states have (on average 3.7786061026352287) internal successors, (65385), 17304 states have internal predecessors, (65385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17305 states to 17305 states and 65385 transitions. [2022-03-15 15:29:31,911 INFO L78 Accepts]: Start accepts. Automaton has 17305 states and 65385 transitions. Word has length 25 [2022-03-15 15:29:31,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:31,911 INFO L470 AbstractCegarLoop]: Abstraction has 17305 states and 65385 transitions. [2022-03-15 15:29:31,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:31,911 INFO L276 IsEmpty]: Start isEmpty. Operand 17305 states and 65385 transitions. [2022-03-15 15:29:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:31,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:31,946 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:31,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-15 15:29:32,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-15 15:29:32,159 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash -330182600, now seen corresponding path program 32 times [2022-03-15 15:29:32,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:32,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781347838] [2022-03-15 15:29:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:32,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:32,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:32,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781347838] [2022-03-15 15:29:32,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781347838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:32,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439793948] [2022-03-15 15:29:32,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:29:32,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:32,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:32,203 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:32,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 15:29:32,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:29:32,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:32,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:29:32,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:32,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:29:32,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439793948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:32,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:32,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-15 15:29:32,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273872779] [2022-03-15 15:29:32,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:32,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:29:32,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:32,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:29:32,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:29:32,406 INFO L87 Difference]: Start difference. First operand 17305 states and 65385 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2022-03-15 15:29:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:34,257 INFO L93 Difference]: Finished difference Result 36778 states and 129120 transitions. [2022-03-15 15:29:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 15:29:34,257 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:34,376 INFO L225 Difference]: With dead ends: 36778 [2022-03-15 15:29:34,377 INFO L226 Difference]: Without dead ends: 36631 [2022-03-15 15:29:34,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1592, Invalid=5214, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 15:29:34,377 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 299 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:34,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 347 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:29:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36631 states. [2022-03-15 15:29:34,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36631 to 18807. [2022-03-15 15:29:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18807 states, 18806 states have (on average 3.787089226842497) internal successors, (71220), 18806 states have internal predecessors, (71220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:35,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18807 states to 18807 states and 71220 transitions. [2022-03-15 15:29:35,097 INFO L78 Accepts]: Start accepts. Automaton has 18807 states and 71220 transitions. Word has length 25 [2022-03-15 15:29:35,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:35,097 INFO L470 AbstractCegarLoop]: Abstraction has 18807 states and 71220 transitions. [2022-03-15 15:29:35,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2022-03-15 15:29:35,097 INFO L276 IsEmpty]: Start isEmpty. Operand 18807 states and 71220 transitions. [2022-03-15 15:29:35,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:35,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:35,141 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:35,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:35,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-15 15:29:35,357 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:35,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:35,357 INFO L85 PathProgramCache]: Analyzing trace with hash -661165984, now seen corresponding path program 33 times [2022-03-15 15:29:35,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:35,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886566996] [2022-03-15 15:29:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:35,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:35,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:35,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886566996] [2022-03-15 15:29:35,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886566996] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:35,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048341477] [2022-03-15 15:29:35,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:29:35,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:35,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:35,392 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:35,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 15:29:35,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:29:35,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:35,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:29:35,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:35,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:35,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048341477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:35,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:35,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-15 15:29:35,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818070539] [2022-03-15 15:29:35,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:35,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:29:35,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:29:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:29:35,636 INFO L87 Difference]: Start difference. First operand 18807 states and 71220 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:37,158 INFO L93 Difference]: Finished difference Result 38461 states and 136607 transitions. [2022-03-15 15:29:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-15 15:29:37,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:37,300 INFO L225 Difference]: With dead ends: 38461 [2022-03-15 15:29:37,300 INFO L226 Difference]: Without dead ends: 38441 [2022-03-15 15:29:37,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1643, Invalid=5667, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 15:29:37,301 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 416 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:37,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 327 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:29:37,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38441 states. [2022-03-15 15:29:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38441 to 19701. [2022-03-15 15:29:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19701 states, 19700 states have (on average 3.814517766497462) internal successors, (75146), 19700 states have internal predecessors, (75146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:38,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19701 states to 19701 states and 75146 transitions. [2022-03-15 15:29:38,136 INFO L78 Accepts]: Start accepts. Automaton has 19701 states and 75146 transitions. Word has length 25 [2022-03-15 15:29:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:38,137 INFO L470 AbstractCegarLoop]: Abstraction has 19701 states and 75146 transitions. [2022-03-15 15:29:38,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:38,137 INFO L276 IsEmpty]: Start isEmpty. Operand 19701 states and 75146 transitions. [2022-03-15 15:29:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:38,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:38,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:38,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:38,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:38,395 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:38,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:38,396 INFO L85 PathProgramCache]: Analyzing trace with hash 317391460, now seen corresponding path program 34 times [2022-03-15 15:29:38,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:38,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058163117] [2022-03-15 15:29:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:38,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:38,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:38,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058163117] [2022-03-15 15:29:38,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058163117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:38,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72751947] [2022-03-15 15:29:38,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:29:38,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:38,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:38,434 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:38,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 15:29:38,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:29:38,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:38,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:29:38,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:38,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:38,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72751947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:38,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:38,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-15 15:29:38,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204550543] [2022-03-15 15:29:38,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:38,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:29:38,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:38,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:29:38,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:29:38,637 INFO L87 Difference]: Start difference. First operand 19701 states and 75146 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2022-03-15 15:29:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:39,980 INFO L93 Difference]: Finished difference Result 42407 states and 150603 transitions. [2022-03-15 15:29:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 15:29:39,981 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:39,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:40,135 INFO L225 Difference]: With dead ends: 42407 [2022-03-15 15:29:40,135 INFO L226 Difference]: Without dead ends: 42407 [2022-03-15 15:29:40,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1245, Invalid=3585, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 15:29:40,136 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 352 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:40,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 283 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:29:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42407 states. [2022-03-15 15:29:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42407 to 19861. [2022-03-15 15:29:40,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19861 states, 19860 states have (on average 3.8128398791540787) internal successors, (75723), 19860 states have internal predecessors, (75723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19861 states to 19861 states and 75723 transitions. [2022-03-15 15:29:41,074 INFO L78 Accepts]: Start accepts. Automaton has 19861 states and 75723 transitions. Word has length 25 [2022-03-15 15:29:41,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:41,074 INFO L470 AbstractCegarLoop]: Abstraction has 19861 states and 75723 transitions. [2022-03-15 15:29:41,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2022-03-15 15:29:41,074 INFO L276 IsEmpty]: Start isEmpty. Operand 19861 states and 75723 transitions. [2022-03-15 15:29:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:41,119 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:41,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:41,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:41,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:41,334 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:41,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:41,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1954857304, now seen corresponding path program 35 times [2022-03-15 15:29:41,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:41,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10226156] [2022-03-15 15:29:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:41,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:41,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:41,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10226156] [2022-03-15 15:29:41,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10226156] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:41,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771210347] [2022-03-15 15:29:41,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:29:41,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:41,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:41,381 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:41,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 15:29:41,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 15:29:41,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:41,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:29:41,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:41,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:41,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771210347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:41,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:41,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-15 15:29:41,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198001633] [2022-03-15 15:29:41,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:41,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:29:41,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:41,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:29:41,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:29:41,616 INFO L87 Difference]: Start difference. First operand 19861 states and 75723 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:43,251 INFO L93 Difference]: Finished difference Result 29050 states and 104041 transitions. [2022-03-15 15:29:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-15 15:29:43,251 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:43,334 INFO L225 Difference]: With dead ends: 29050 [2022-03-15 15:29:43,334 INFO L226 Difference]: Without dead ends: 29030 [2022-03-15 15:29:43,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2589 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1603, Invalid=6053, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 15:29:43,335 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 357 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:43,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 265 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:29:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29030 states. [2022-03-15 15:29:43,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29030 to 19891. [2022-03-15 15:29:43,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19891 states, 19890 states have (on average 3.8126696832579188) internal successors, (75834), 19890 states have internal predecessors, (75834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19891 states to 19891 states and 75834 transitions. [2022-03-15 15:29:43,964 INFO L78 Accepts]: Start accepts. Automaton has 19891 states and 75834 transitions. Word has length 25 [2022-03-15 15:29:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:43,964 INFO L470 AbstractCegarLoop]: Abstraction has 19891 states and 75834 transitions. [2022-03-15 15:29:43,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:43,964 INFO L276 IsEmpty]: Start isEmpty. Operand 19891 states and 75834 transitions. [2022-03-15 15:29:43,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:43,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:43,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:44,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:44,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:44,214 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:44,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:44,214 INFO L85 PathProgramCache]: Analyzing trace with hash -653679320, now seen corresponding path program 36 times [2022-03-15 15:29:44,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:44,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452047179] [2022-03-15 15:29:44,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:44,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:44,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:44,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452047179] [2022-03-15 15:29:44,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452047179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:44,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332803924] [2022-03-15 15:29:44,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:29:44,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:44,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:44,240 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:44,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 15:29:44,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:29:44,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:44,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:29:44,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:44,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:44,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332803924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:44,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:44,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-15 15:29:44,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665233577] [2022-03-15 15:29:44,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:44,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:29:44,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:44,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:29:44,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:29:44,384 INFO L87 Difference]: Start difference. First operand 19891 states and 75834 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:45,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:45,277 INFO L93 Difference]: Finished difference Result 27444 states and 99436 transitions. [2022-03-15 15:29:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 15:29:45,277 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:45,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:45,555 INFO L225 Difference]: With dead ends: 27444 [2022-03-15 15:29:45,556 INFO L226 Difference]: Without dead ends: 27416 [2022-03-15 15:29:45,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=988, Invalid=3568, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 15:29:45,556 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 335 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:45,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 238 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:29:45,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27416 states. [2022-03-15 15:29:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27416 to 19843. [2022-03-15 15:29:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19843 states, 19842 states have (on average 3.81267009374055) internal successors, (75651), 19842 states have internal predecessors, (75651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19843 states to 19843 states and 75651 transitions. [2022-03-15 15:29:46,256 INFO L78 Accepts]: Start accepts. Automaton has 19843 states and 75651 transitions. Word has length 25 [2022-03-15 15:29:46,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:46,256 INFO L470 AbstractCegarLoop]: Abstraction has 19843 states and 75651 transitions. [2022-03-15 15:29:46,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:46,256 INFO L276 IsEmpty]: Start isEmpty. Operand 19843 states and 75651 transitions. [2022-03-15 15:29:46,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:46,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:46,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:46,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:46,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-15 15:29:46,509 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:46,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:46,509 INFO L85 PathProgramCache]: Analyzing trace with hash -652057300, now seen corresponding path program 37 times [2022-03-15 15:29:46,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:46,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607709504] [2022-03-15 15:29:46,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:46,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:46,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:46,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607709504] [2022-03-15 15:29:46,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607709504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:46,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729036040] [2022-03-15 15:29:46,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:29:46,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:46,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:46,545 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:46,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 15:29:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:46,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:29:46,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:46,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:46,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729036040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:46,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:46,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-15 15:29:46,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903707515] [2022-03-15 15:29:46,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:46,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:29:46,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:46,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:29:46,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:29:46,758 INFO L87 Difference]: Start difference. First operand 19843 states and 75651 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2022-03-15 15:29:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:48,384 INFO L93 Difference]: Finished difference Result 44907 states and 159794 transitions. [2022-03-15 15:29:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 15:29:48,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:48,537 INFO L225 Difference]: With dead ends: 44907 [2022-03-15 15:29:48,537 INFO L226 Difference]: Without dead ends: 44907 [2022-03-15 15:29:48,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1347, Invalid=4055, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 15:29:48,537 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 356 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:48,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 322 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:29:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44907 states. [2022-03-15 15:29:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44907 to 20040. [2022-03-15 15:29:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20040 states, 20039 states have (on average 3.822945256749339) internal successors, (76608), 20039 states have internal predecessors, (76608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20040 states to 20040 states and 76608 transitions. [2022-03-15 15:29:49,390 INFO L78 Accepts]: Start accepts. Automaton has 20040 states and 76608 transitions. Word has length 25 [2022-03-15 15:29:49,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:49,390 INFO L470 AbstractCegarLoop]: Abstraction has 20040 states and 76608 transitions. [2022-03-15 15:29:49,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2022-03-15 15:29:49,390 INFO L276 IsEmpty]: Start isEmpty. Operand 20040 states and 76608 transitions. [2022-03-15 15:29:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:49,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:49,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:49,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:49,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-15 15:29:49,644 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:49,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:49,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1522968036, now seen corresponding path program 38 times [2022-03-15 15:29:49,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:49,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841636116] [2022-03-15 15:29:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:49,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:49,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:49,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841636116] [2022-03-15 15:29:49,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841636116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:49,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443551257] [2022-03-15 15:29:49,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:29:49,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:49,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:49,720 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:49,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 15:29:49,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:29:49,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:49,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:29:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:49,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:49,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443551257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:49,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:49,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-15 15:29:49,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065281837] [2022-03-15 15:29:49,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:49,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:29:49,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:49,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:29:49,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:29:49,945 INFO L87 Difference]: Start difference. First operand 20040 states and 76608 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:51,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:51,493 INFO L93 Difference]: Finished difference Result 38585 states and 138924 transitions. [2022-03-15 15:29:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 15:29:51,494 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:51,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:51,621 INFO L225 Difference]: With dead ends: 38585 [2022-03-15 15:29:51,621 INFO L226 Difference]: Without dead ends: 38559 [2022-03-15 15:29:51,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1087, Invalid=3605, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 15:29:51,622 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 303 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:51,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 313 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:29:51,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38559 states. [2022-03-15 15:29:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38559 to 18199. [2022-03-15 15:29:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18199 states, 18198 states have (on average 3.7716232553027806) internal successors, (68636), 18198 states have internal predecessors, (68636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:52,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18199 states to 18199 states and 68636 transitions. [2022-03-15 15:29:52,343 INFO L78 Accepts]: Start accepts. Automaton has 18199 states and 68636 transitions. Word has length 25 [2022-03-15 15:29:52,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:52,344 INFO L470 AbstractCegarLoop]: Abstraction has 18199 states and 68636 transitions. [2022-03-15 15:29:52,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 18199 states and 68636 transitions. [2022-03-15 15:29:52,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:52,379 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:52,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:52,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:52,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 15:29:52,594 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:52,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:52,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1679166192, now seen corresponding path program 39 times [2022-03-15 15:29:52,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:52,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376026332] [2022-03-15 15:29:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:52,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:52,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:52,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376026332] [2022-03-15 15:29:52,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376026332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:52,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167950504] [2022-03-15 15:29:52,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:29:52,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:52,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:52,644 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:52,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 15:29:52,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:29:52,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:29:52,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:52,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:52,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167950504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:52,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:52,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2022-03-15 15:29:52,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126155489] [2022-03-15 15:29:52,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:52,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:29:52,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:52,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:29:52,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:29:52,849 INFO L87 Difference]: Start difference. First operand 18199 states and 68636 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:54,353 INFO L93 Difference]: Finished difference Result 40360 states and 142259 transitions. [2022-03-15 15:29:54,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 15:29:54,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:54,495 INFO L225 Difference]: With dead ends: 40360 [2022-03-15 15:29:54,495 INFO L226 Difference]: Without dead ends: 40255 [2022-03-15 15:29:54,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=979, Invalid=3311, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 15:29:54,496 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 332 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:54,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 360 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:29:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40255 states. [2022-03-15 15:29:55,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40255 to 20551. [2022-03-15 15:29:55,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20551 states, 20550 states have (on average 3.7790267639902675) internal successors, (77659), 20550 states have internal predecessors, (77659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:55,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20551 states to 20551 states and 77659 transitions. [2022-03-15 15:29:55,259 INFO L78 Accepts]: Start accepts. Automaton has 20551 states and 77659 transitions. Word has length 25 [2022-03-15 15:29:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:55,262 INFO L470 AbstractCegarLoop]: Abstraction has 20551 states and 77659 transitions. [2022-03-15 15:29:55,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 20551 states and 77659 transitions. [2022-03-15 15:29:55,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:55,305 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:55,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:55,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:55,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 15:29:55,519 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash 279298928, now seen corresponding path program 40 times [2022-03-15 15:29:55,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:55,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280887427] [2022-03-15 15:29:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:55,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:55,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:55,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280887427] [2022-03-15 15:29:55,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280887427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:55,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057807149] [2022-03-15 15:29:55,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:29:55,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:55,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:55,569 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:55,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 15:29:55,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:29:55,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:55,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:29:55,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:55,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:29:55,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057807149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:55,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:55,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 15:29:55,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552010932] [2022-03-15 15:29:55,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:55,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:29:55,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:55,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:29:55,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:29:55,912 INFO L87 Difference]: Start difference. First operand 20551 states and 77659 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:57,007 INFO L93 Difference]: Finished difference Result 22941 states and 84154 transitions. [2022-03-15 15:29:57,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 15:29:57,007 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:57,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:57,064 INFO L225 Difference]: With dead ends: 22941 [2022-03-15 15:29:57,064 INFO L226 Difference]: Without dead ends: 22933 [2022-03-15 15:29:57,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=830, Invalid=2710, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 15:29:57,064 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 263 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:57,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 332 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:29:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22933 states. [2022-03-15 15:29:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22933 to 20586. [2022-03-15 15:29:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20586 states, 20585 states have (on average 3.780616954092786) internal successors, (77824), 20585 states have internal predecessors, (77824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20586 states to 20586 states and 77824 transitions. [2022-03-15 15:29:57,534 INFO L78 Accepts]: Start accepts. Automaton has 20586 states and 77824 transitions. Word has length 25 [2022-03-15 15:29:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:57,534 INFO L470 AbstractCegarLoop]: Abstraction has 20586 states and 77824 transitions. [2022-03-15 15:29:57,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 20586 states and 77824 transitions. [2022-03-15 15:29:57,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:29:57,570 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:57,570 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:57,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:57,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:57,772 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:29:57,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:57,772 INFO L85 PathProgramCache]: Analyzing trace with hash -187524200, now seen corresponding path program 41 times [2022-03-15 15:29:57,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:57,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058167875] [2022-03-15 15:29:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:57,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:29:57,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:57,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058167875] [2022-03-15 15:29:57,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058167875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:57,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985286149] [2022-03-15 15:29:57,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:29:57,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:57,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:57,814 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:57,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 15:29:57,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:29:57,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:57,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:29:57,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:58,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 15:29:58,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985286149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:58,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:58,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-03-15 15:29:58,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882407174] [2022-03-15 15:29:58,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:58,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:29:58,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:58,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:29:58,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:29:58,070 INFO L87 Difference]: Start difference. First operand 20586 states and 77824 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:59,191 INFO L93 Difference]: Finished difference Result 23579 states and 86042 transitions. [2022-03-15 15:29:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 15:29:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:29:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:59,272 INFO L225 Difference]: With dead ends: 23579 [2022-03-15 15:29:59,272 INFO L226 Difference]: Without dead ends: 23571 [2022-03-15 15:29:59,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=761, Invalid=2545, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 15:29:59,273 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 307 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:59,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 260 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:29:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23571 states. [2022-03-15 15:29:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23571 to 20830. [2022-03-15 15:29:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20830 states, 20829 states have (on average 3.7727207259109896) internal successors, (78582), 20829 states have internal predecessors, (78582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20830 states to 20830 states and 78582 transitions. [2022-03-15 15:29:59,987 INFO L78 Accepts]: Start accepts. Automaton has 20830 states and 78582 transitions. Word has length 25 [2022-03-15 15:29:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:59,987 INFO L470 AbstractCegarLoop]: Abstraction has 20830 states and 78582 transitions. [2022-03-15 15:29:59,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 20830 states and 78582 transitions. [2022-03-15 15:30:00,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:00,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:00,028 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:00,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-15 15:30:00,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-15 15:30:00,243 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:00,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:00,243 INFO L85 PathProgramCache]: Analyzing trace with hash -314399848, now seen corresponding path program 42 times [2022-03-15 15:30:00,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:00,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934481668] [2022-03-15 15:30:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:00,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:00,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:00,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934481668] [2022-03-15 15:30:00,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934481668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:00,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926496527] [2022-03-15 15:30:00,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:30:00,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:00,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:00,290 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:00,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 15:30:00,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:30:00,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:00,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:00,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:00,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:30:00,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926496527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:00,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:00,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-03-15 15:30:00,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177342213] [2022-03-15 15:30:00,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:00,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:30:00,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:00,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:30:00,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:30:00,542 INFO L87 Difference]: Start difference. First operand 20830 states and 78582 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:01,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:01,495 INFO L93 Difference]: Finished difference Result 23174 states and 84978 transitions. [2022-03-15 15:30:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 15:30:01,496 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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 25 [2022-03-15 15:30:01,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:01,561 INFO L225 Difference]: With dead ends: 23174 [2022-03-15 15:30:01,561 INFO L226 Difference]: Without dead ends: 23153 [2022-03-15 15:30:01,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=580, Invalid=2072, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:30:01,562 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 304 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:01,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 211 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:30:01,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23153 states. [2022-03-15 15:30:02,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23153 to 20830. [2022-03-15 15:30:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20830 states, 20829 states have (on average 3.772144606078064) internal successors, (78570), 20829 states have internal predecessors, (78570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:02,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20830 states to 20830 states and 78570 transitions. [2022-03-15 15:30:02,144 INFO L78 Accepts]: Start accepts. Automaton has 20830 states and 78570 transitions. Word has length 25 [2022-03-15 15:30:02,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:02,144 INFO L470 AbstractCegarLoop]: Abstraction has 20830 states and 78570 transitions. [2022-03-15 15:30:02,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:02,144 INFO L276 IsEmpty]: Start isEmpty. Operand 20830 states and 78570 transitions. [2022-03-15 15:30:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:02,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:02,186 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:02,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-15 15:30:02,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:02,399 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:02,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2144293020, now seen corresponding path program 43 times [2022-03-15 15:30:02,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:02,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746822314] [2022-03-15 15:30:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:02,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:02,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:02,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746822314] [2022-03-15 15:30:02,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746822314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:02,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188962746] [2022-03-15 15:30:02,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:30:02,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:02,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:02,447 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:02,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 15:30:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:02,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:02,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:30:02,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188962746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:02,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:02,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 15:30:02,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093011584] [2022-03-15 15:30:02,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:02,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:30:02,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:02,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:30:02,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:30:02,802 INFO L87 Difference]: Start difference. First operand 20830 states and 78570 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:03,682 INFO L93 Difference]: Finished difference Result 22869 states and 84154 transitions. [2022-03-15 15:30:03,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 15:30:03,682 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:30:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:03,760 INFO L225 Difference]: With dead ends: 22869 [2022-03-15 15:30:03,760 INFO L226 Difference]: Without dead ends: 22827 [2022-03-15 15:30:03,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=575, Invalid=2181, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 15:30:03,761 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 231 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:03,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 247 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:30:03,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22827 states. [2022-03-15 15:30:04,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22827 to 20880. [2022-03-15 15:30:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20880 states, 20879 states have (on average 3.7699602471382727) internal successors, (78713), 20879 states have internal predecessors, (78713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:04,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20880 states to 20880 states and 78713 transitions. [2022-03-15 15:30:04,397 INFO L78 Accepts]: Start accepts. Automaton has 20880 states and 78713 transitions. Word has length 25 [2022-03-15 15:30:04,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:04,397 INFO L470 AbstractCegarLoop]: Abstraction has 20880 states and 78713 transitions. [2022-03-15 15:30:04,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 20880 states and 78713 transitions. [2022-03-15 15:30:04,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:04,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:04,449 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:04,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-15 15:30:04,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:04,663 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:04,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:04,664 INFO L85 PathProgramCache]: Analyzing trace with hash -617290344, now seen corresponding path program 44 times [2022-03-15 15:30:04,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:04,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497761940] [2022-03-15 15:30:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:04,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:04,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:04,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497761940] [2022-03-15 15:30:04,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497761940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:04,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712983279] [2022-03-15 15:30:04,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:30:04,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:04,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:04,713 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:04,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 15:30:04,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:30:04,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:04,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:04,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:04,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:30:04,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712983279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:04,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:04,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 15:30:04,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392291410] [2022-03-15 15:30:04,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:04,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:30:04,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:04,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:30:04,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:30:04,965 INFO L87 Difference]: Start difference. First operand 20880 states and 78713 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:06,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:06,581 INFO L93 Difference]: Finished difference Result 25298 states and 91065 transitions. [2022-03-15 15:30:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 15:30:06,581 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 25 [2022-03-15 15:30:06,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:06,649 INFO L225 Difference]: With dead ends: 25298 [2022-03-15 15:30:06,650 INFO L226 Difference]: Without dead ends: 25290 [2022-03-15 15:30:06,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1533, Invalid=4629, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 15:30:06,651 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 408 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:06,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 280 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:30:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25290 states. [2022-03-15 15:30:07,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25290 to 20938. [2022-03-15 15:30:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20938 states, 20937 states have (on average 3.7672063810479055) internal successors, (78874), 20937 states have internal predecessors, (78874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20938 states to 20938 states and 78874 transitions. [2022-03-15 15:30:07,236 INFO L78 Accepts]: Start accepts. Automaton has 20938 states and 78874 transitions. Word has length 25 [2022-03-15 15:30:07,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:07,236 INFO L470 AbstractCegarLoop]: Abstraction has 20938 states and 78874 transitions. [2022-03-15 15:30:07,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:07,236 INFO L276 IsEmpty]: Start isEmpty. Operand 20938 states and 78874 transitions. [2022-03-15 15:30:07,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:07,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:07,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:07,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-15 15:30:07,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:07,498 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:07,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:07,498 INFO L85 PathProgramCache]: Analyzing trace with hash -744165992, now seen corresponding path program 45 times [2022-03-15 15:30:07,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:07,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629384208] [2022-03-15 15:30:07,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:07,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:07,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:07,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629384208] [2022-03-15 15:30:07,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629384208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:07,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212209819] [2022-03-15 15:30:07,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:30:07,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:07,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:07,561 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:07,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 15:30:07,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:30:07,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:07,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:07,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:07,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:30:07,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212209819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:07,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:07,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 15:30:07,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889396952] [2022-03-15 15:30:07,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:07,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:30:07,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:07,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:30:07,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:30:07,905 INFO L87 Difference]: Start difference. First operand 20938 states and 78874 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:09,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:09,277 INFO L93 Difference]: Finished difference Result 24738 states and 89541 transitions. [2022-03-15 15:30:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 15:30:09,277 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:30:09,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:09,358 INFO L225 Difference]: With dead ends: 24738 [2022-03-15 15:30:09,358 INFO L226 Difference]: Without dead ends: 24724 [2022-03-15 15:30:09,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=3794, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 15:30:09,359 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 402 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:09,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 292 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:30:09,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24724 states. [2022-03-15 15:30:09,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24724 to 20870. [2022-03-15 15:30:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20870 states, 20869 states have (on average 3.767502036513489) internal successors, (78624), 20869 states have internal predecessors, (78624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 78624 transitions. [2022-03-15 15:30:10,017 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 78624 transitions. Word has length 25 [2022-03-15 15:30:10,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:10,017 INFO L470 AbstractCegarLoop]: Abstraction has 20870 states and 78624 transitions. [2022-03-15 15:30:10,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:10,017 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 78624 transitions. [2022-03-15 15:30:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:10,143 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:10,143 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:10,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-15 15:30:10,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-03-15 15:30:10,359 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:10,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1714526876, now seen corresponding path program 46 times [2022-03-15 15:30:10,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:10,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500696896] [2022-03-15 15:30:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:10,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:10,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:10,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500696896] [2022-03-15 15:30:10,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500696896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:10,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362440040] [2022-03-15 15:30:10,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:30:10,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:10,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:10,403 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:10,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 15:30:10,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:30:10,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:10,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:10,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:10,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:30:10,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362440040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:10,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:10,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 15:30:10,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756098087] [2022-03-15 15:30:10,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:10,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:30:10,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:10,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:30:10,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:30:10,621 INFO L87 Difference]: Start difference. First operand 20870 states and 78624 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:11,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:11,560 INFO L93 Difference]: Finished difference Result 24543 states and 89002 transitions. [2022-03-15 15:30:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 15:30:11,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:30:11,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:11,626 INFO L225 Difference]: With dead ends: 24543 [2022-03-15 15:30:11,626 INFO L226 Difference]: Without dead ends: 24501 [2022-03-15 15:30:11,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=881, Invalid=3025, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 15:30:11,627 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 393 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:11,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 282 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:30:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24501 states. [2022-03-15 15:30:12,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24501 to 20870. [2022-03-15 15:30:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20870 states, 20869 states have (on average 3.764626958646797) internal successors, (78564), 20869 states have internal predecessors, (78564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 78564 transitions. [2022-03-15 15:30:12,134 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 78564 transitions. Word has length 25 [2022-03-15 15:30:12,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:12,134 INFO L470 AbstractCegarLoop]: Abstraction has 20870 states and 78564 transitions. [2022-03-15 15:30:12,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 78564 transitions. [2022-03-15 15:30:12,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:12,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:12,182 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:12,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-15 15:30:12,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:12,399 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:12,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:12,399 INFO L85 PathProgramCache]: Analyzing trace with hash -122616932, now seen corresponding path program 47 times [2022-03-15 15:30:12,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:12,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069291435] [2022-03-15 15:30:12,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:12,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:12,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:12,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069291435] [2022-03-15 15:30:12,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069291435] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:12,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351924267] [2022-03-15 15:30:12,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:30:12,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:12,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:12,461 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:12,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 15:30:12,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:30:12,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:12,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:12,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:12,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:30:12,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351924267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:12,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:12,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 15:30:12,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981201580] [2022-03-15 15:30:12,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:12,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:30:12,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:12,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:30:12,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:30:12,705 INFO L87 Difference]: Start difference. First operand 20870 states and 78564 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:14,264 INFO L93 Difference]: Finished difference Result 25180 states and 90786 transitions. [2022-03-15 15:30:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 15:30:14,264 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:30:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:14,339 INFO L225 Difference]: With dead ends: 25180 [2022-03-15 15:30:14,340 INFO L226 Difference]: Without dead ends: 25174 [2022-03-15 15:30:14,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1521, Invalid=4641, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 15:30:14,340 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 380 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:14,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 387 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:30:14,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25174 states. [2022-03-15 15:30:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25174 to 20939. [2022-03-15 15:30:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20939 states, 20938 states have (on average 3.7627280542554207) internal successors, (78784), 20938 states have internal predecessors, (78784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20939 states to 20939 states and 78784 transitions. [2022-03-15 15:30:15,042 INFO L78 Accepts]: Start accepts. Automaton has 20939 states and 78784 transitions. Word has length 25 [2022-03-15 15:30:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:15,042 INFO L470 AbstractCegarLoop]: Abstraction has 20939 states and 78784 transitions. [2022-03-15 15:30:15,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 20939 states and 78784 transitions. [2022-03-15 15:30:15,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:15,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:15,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:15,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-15 15:30:15,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:15,297 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:15,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:15,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1464786516, now seen corresponding path program 48 times [2022-03-15 15:30:15,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:15,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128781050] [2022-03-15 15:30:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:15,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:15,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:15,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128781050] [2022-03-15 15:30:15,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128781050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:15,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553247458] [2022-03-15 15:30:15,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:30:15,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:15,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:15,332 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:15,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 15:30:15,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:30:15,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:15,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:30:15,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:15,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:15,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553247458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:15,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:15,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2022-03-15 15:30:15,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504058304] [2022-03-15 15:30:15,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:15,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:30:15,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:15,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:30:15,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:30:15,503 INFO L87 Difference]: Start difference. First operand 20939 states and 78784 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:16,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:16,766 INFO L93 Difference]: Finished difference Result 58125 states and 204380 transitions. [2022-03-15 15:30:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 15:30:16,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 25 [2022-03-15 15:30:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:17,132 INFO L225 Difference]: With dead ends: 58125 [2022-03-15 15:30:17,132 INFO L226 Difference]: Without dead ends: 58111 [2022-03-15 15:30:17,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1068, Invalid=4188, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 15:30:17,133 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 427 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:17,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 388 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:30:17,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58111 states. [2022-03-15 15:30:18,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58111 to 26073. [2022-03-15 15:30:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26073 states, 26072 states have (on average 3.828973611537281) internal successors, (99829), 26072 states have internal predecessors, (99829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:18,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26073 states to 26073 states and 99829 transitions. [2022-03-15 15:30:18,240 INFO L78 Accepts]: Start accepts. Automaton has 26073 states and 99829 transitions. Word has length 25 [2022-03-15 15:30:18,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:18,240 INFO L470 AbstractCegarLoop]: Abstraction has 26073 states and 99829 transitions. [2022-03-15 15:30:18,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:18,240 INFO L276 IsEmpty]: Start isEmpty. Operand 26073 states and 99829 transitions. [2022-03-15 15:30:18,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:18,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:18,299 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:18,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-15 15:30:18,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 15:30:18,514 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:18,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:18,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1012330792, now seen corresponding path program 49 times [2022-03-15 15:30:18,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:18,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088486495] [2022-03-15 15:30:18,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:18,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:18,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:18,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088486495] [2022-03-15 15:30:18,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088486495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:18,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897092094] [2022-03-15 15:30:18,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:30:18,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:18,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:18,560 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:18,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 15:30:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:18,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:18,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:18,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:30:19,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897092094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:19,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:19,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-03-15 15:30:19,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190282752] [2022-03-15 15:30:19,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:19,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:30:19,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:30:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:30:19,011 INFO L87 Difference]: Start difference. First operand 26073 states and 99829 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:21,319 INFO L93 Difference]: Finished difference Result 48693 states and 178339 transitions. [2022-03-15 15:30:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-15 15:30:21,319 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:30:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:21,479 INFO L225 Difference]: With dead ends: 48693 [2022-03-15 15:30:21,480 INFO L226 Difference]: Without dead ends: 48685 [2022-03-15 15:30:21,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4289 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2572, Invalid=9418, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 15:30:21,480 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 505 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:21,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 493 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 15:30:21,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48685 states. [2022-03-15 15:30:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48685 to 26268. [2022-03-15 15:30:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26268 states, 26267 states have (on average 3.834012258727681) internal successors, (100708), 26267 states have internal predecessors, (100708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26268 states to 26268 states and 100708 transitions. [2022-03-15 15:30:22,524 INFO L78 Accepts]: Start accepts. Automaton has 26268 states and 100708 transitions. Word has length 25 [2022-03-15 15:30:22,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:22,524 INFO L470 AbstractCegarLoop]: Abstraction has 26268 states and 100708 transitions. [2022-03-15 15:30:22,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:22,524 INFO L276 IsEmpty]: Start isEmpty. Operand 26268 states and 100708 transitions. [2022-03-15 15:30:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:22,585 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:22,585 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:22,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-15 15:30:22,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-15 15:30:22,801 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:22,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:22,801 INFO L85 PathProgramCache]: Analyzing trace with hash 640471336, now seen corresponding path program 50 times [2022-03-15 15:30:22,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:22,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328329941] [2022-03-15 15:30:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:22,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:22,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:22,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328329941] [2022-03-15 15:30:22,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328329941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:22,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564906389] [2022-03-15 15:30:22,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:30:22,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:22,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:22,836 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:22,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 15:30:22,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:30:22,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:22,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:22,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:23,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:30:23,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564906389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:23,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:23,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-03-15 15:30:23,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810324563] [2022-03-15 15:30:23,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:23,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:30:23,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:23,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:30:23,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:30:23,120 INFO L87 Difference]: Start difference. First operand 26268 states and 100708 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:24,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:24,496 INFO L93 Difference]: Finished difference Result 44483 states and 163225 transitions. [2022-03-15 15:30:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 15:30:24,496 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:30:24,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:24,634 INFO L225 Difference]: With dead ends: 44483 [2022-03-15 15:30:24,635 INFO L226 Difference]: Without dead ends: 44477 [2022-03-15 15:30:24,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1624, Invalid=5348, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 15:30:24,635 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 320 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:24,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 521 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:30:24,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44477 states. [2022-03-15 15:30:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44477 to 26193. [2022-03-15 15:30:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26193 states, 26192 states have (on average 3.831589798411729) internal successors, (100357), 26192 states have internal predecessors, (100357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:25,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26193 states to 26193 states and 100357 transitions. [2022-03-15 15:30:25,585 INFO L78 Accepts]: Start accepts. Automaton has 26193 states and 100357 transitions. Word has length 25 [2022-03-15 15:30:25,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:25,585 INFO L470 AbstractCegarLoop]: Abstraction has 26193 states and 100357 transitions. [2022-03-15 15:30:25,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:25,586 INFO L276 IsEmpty]: Start isEmpty. Operand 26193 states and 100357 transitions. [2022-03-15 15:30:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:25,639 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:25,639 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:25,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-15 15:30:25,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-15 15:30:25,855 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:25,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:25,855 INFO L85 PathProgramCache]: Analyzing trace with hash 710238820, now seen corresponding path program 51 times [2022-03-15 15:30:25,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:25,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125602213] [2022-03-15 15:30:25,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:25,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:25,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:25,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125602213] [2022-03-15 15:30:25,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125602213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:25,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481668859] [2022-03-15 15:30:25,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:30:25,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:25,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:25,909 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:25,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 15:30:25,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:30:25,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:25,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:30:25,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:26,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:30:26,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481668859] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:26,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:26,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2022-03-15 15:30:26,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951678008] [2022-03-15 15:30:26,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:26,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:30:26,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:26,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:30:26,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:30:26,102 INFO L87 Difference]: Start difference. First operand 26193 states and 100357 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:27,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:27,664 INFO L93 Difference]: Finished difference Result 52333 states and 186074 transitions. [2022-03-15 15:30:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 15:30:27,664 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:30:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:27,991 INFO L225 Difference]: With dead ends: 52333 [2022-03-15 15:30:27,991 INFO L226 Difference]: Without dead ends: 52301 [2022-03-15 15:30:27,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=965, Invalid=4005, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 15:30:27,992 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 567 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:27,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 314 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:30:28,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52301 states. [2022-03-15 15:30:28,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52301 to 26092. [2022-03-15 15:30:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26092 states, 26091 states have (on average 3.825495381549193) internal successors, (99811), 26091 states have internal predecessors, (99811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:28,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26092 states to 26092 states and 99811 transitions. [2022-03-15 15:30:28,947 INFO L78 Accepts]: Start accepts. Automaton has 26092 states and 99811 transitions. Word has length 25 [2022-03-15 15:30:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:28,947 INFO L470 AbstractCegarLoop]: Abstraction has 26092 states and 99811 transitions. [2022-03-15 15:30:28,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 26092 states and 99811 transitions. [2022-03-15 15:30:28,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:28,998 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:28,998 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:29,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-15 15:30:29,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:29,214 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:29,214 INFO L85 PathProgramCache]: Analyzing trace with hash -296212516, now seen corresponding path program 52 times [2022-03-15 15:30:29,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:29,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734466269] [2022-03-15 15:30:29,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:29,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:29,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:29,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734466269] [2022-03-15 15:30:29,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734466269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:29,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226129357] [2022-03-15 15:30:29,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:30:29,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:29,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:29,292 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:29,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 15:30:29,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:30:29,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:29,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:29,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:29,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:29,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226129357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:29,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:29,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 15:30:29,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687044466] [2022-03-15 15:30:29,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:29,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:30:29,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:29,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:30:29,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:30:29,577 INFO L87 Difference]: Start difference. First operand 26092 states and 99811 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:31,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:31,173 INFO L93 Difference]: Finished difference Result 34759 states and 128404 transitions. [2022-03-15 15:30:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 15:30:31,174 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:30:31,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:31,292 INFO L225 Difference]: With dead ends: 34759 [2022-03-15 15:30:31,292 INFO L226 Difference]: Without dead ends: 34753 [2022-03-15 15:30:31,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=923, Invalid=3769, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 15:30:31,293 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 250 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:31,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 538 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 15:30:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34753 states. [2022-03-15 15:30:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34753 to 26308. [2022-03-15 15:30:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26308 states, 26307 states have (on average 3.821644429239366) internal successors, (100536), 26307 states have internal predecessors, (100536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26308 states to 26308 states and 100536 transitions. [2022-03-15 15:30:32,153 INFO L78 Accepts]: Start accepts. Automaton has 26308 states and 100536 transitions. Word has length 25 [2022-03-15 15:30:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:32,153 INFO L470 AbstractCegarLoop]: Abstraction has 26308 states and 100536 transitions. [2022-03-15 15:30:32,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 26308 states and 100536 transitions. [2022-03-15 15:30:32,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:32,211 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:32,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:32,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-15 15:30:32,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-15 15:30:32,426 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:32,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1840364470, now seen corresponding path program 53 times [2022-03-15 15:30:32,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:32,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728991959] [2022-03-15 15:30:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:32,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:32,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:32,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728991959] [2022-03-15 15:30:32,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728991959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:32,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153728005] [2022-03-15 15:30:32,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:30:32,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:32,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:32,464 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:32,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 15:30:32,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:30:32,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:32,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:30:32,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:32,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:32,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153728005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:32,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:32,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-03-15 15:30:32,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556245126] [2022-03-15 15:30:32,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:32,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:30:32,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:32,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:30:32,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:30:32,617 INFO L87 Difference]: Start difference. First operand 26308 states and 100536 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:34,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:34,160 INFO L93 Difference]: Finished difference Result 53460 states and 191246 transitions. [2022-03-15 15:30:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 15:30:34,160 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:30:34,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:34,339 INFO L225 Difference]: With dead ends: 53460 [2022-03-15 15:30:34,339 INFO L226 Difference]: Without dead ends: 53392 [2022-03-15 15:30:34,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1361, Invalid=5445, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 15:30:34,340 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 513 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:34,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 377 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:30:34,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53392 states. [2022-03-15 15:30:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53392 to 26763. [2022-03-15 15:30:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26763 states, 26762 states have (on average 3.8272176967341753) internal successors, (102424), 26762 states have internal predecessors, (102424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26763 states to 26763 states and 102424 transitions. [2022-03-15 15:30:35,563 INFO L78 Accepts]: Start accepts. Automaton has 26763 states and 102424 transitions. Word has length 25 [2022-03-15 15:30:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:35,563 INFO L470 AbstractCegarLoop]: Abstraction has 26763 states and 102424 transitions. [2022-03-15 15:30:35,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 26763 states and 102424 transitions. [2022-03-15 15:30:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:35,619 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:35,619 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:35,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-15 15:30:35,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-03-15 15:30:35,830 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:35,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:35,830 INFO L85 PathProgramCache]: Analyzing trace with hash -57991460, now seen corresponding path program 54 times [2022-03-15 15:30:35,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:35,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785294241] [2022-03-15 15:30:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:35,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:35,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:35,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785294241] [2022-03-15 15:30:35,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785294241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:35,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922896375] [2022-03-15 15:30:35,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:30:35,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:35,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:35,891 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:35,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 15:30:35,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:30:35,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:35,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:35,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:36,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:36,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922896375] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:36,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:36,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-03-15 15:30:36,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462634426] [2022-03-15 15:30:36,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:36,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:30:36,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:36,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:30:36,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:30:36,182 INFO L87 Difference]: Start difference. First operand 26763 states and 102424 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:37,709 INFO L93 Difference]: Finished difference Result 30227 states and 112282 transitions. [2022-03-15 15:30:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 15:30:37,709 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:30:37,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:37,796 INFO L225 Difference]: With dead ends: 30227 [2022-03-15 15:30:37,797 INFO L226 Difference]: Without dead ends: 30199 [2022-03-15 15:30:37,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=998, Invalid=3972, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 15:30:37,797 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 356 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:37,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 481 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 15:30:37,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30199 states. [2022-03-15 15:30:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30199 to 26742. [2022-03-15 15:30:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26742 states, 26741 states have (on average 3.828016902883213) internal successors, (102365), 26741 states have internal predecessors, (102365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26742 states to 26742 states and 102365 transitions. [2022-03-15 15:30:38,557 INFO L78 Accepts]: Start accepts. Automaton has 26742 states and 102365 transitions. Word has length 25 [2022-03-15 15:30:38,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:38,557 INFO L470 AbstractCegarLoop]: Abstraction has 26742 states and 102365 transitions. [2022-03-15 15:30:38,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:38,557 INFO L276 IsEmpty]: Start isEmpty. Operand 26742 states and 102365 transitions. [2022-03-15 15:30:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:38,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:38,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:38,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-15 15:30:38,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-15 15:30:38,831 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:38,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:38,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1046603232, now seen corresponding path program 55 times [2022-03-15 15:30:38,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:38,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241530224] [2022-03-15 15:30:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:38,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:38,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:38,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241530224] [2022-03-15 15:30:38,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241530224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:38,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468019445] [2022-03-15 15:30:38,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:30:38,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:38,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:38,868 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:38,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 15:30:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:38,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:38,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:38,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:39,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468019445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:39,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:39,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-03-15 15:30:39,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311376622] [2022-03-15 15:30:39,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:39,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:30:39,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:39,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:30:39,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:30:39,044 INFO L87 Difference]: Start difference. First operand 26742 states and 102365 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-03-15 15:30:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:40,517 INFO L93 Difference]: Finished difference Result 30755 states and 113595 transitions. [2022-03-15 15:30:40,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 15:30:40,517 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 25 [2022-03-15 15:30:40,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:40,611 INFO L225 Difference]: With dead ends: 30755 [2022-03-15 15:30:40,611 INFO L226 Difference]: Without dead ends: 30743 [2022-03-15 15:30:40,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1458, Invalid=5682, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 15:30:40,612 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 381 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:40,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 434 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:30:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30743 states. [2022-03-15 15:30:41,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30743 to 26432. [2022-03-15 15:30:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26432 states, 26431 states have (on average 3.833907154477697) internal successors, (101334), 26431 states have internal predecessors, (101334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26432 states to 26432 states and 101334 transitions. [2022-03-15 15:30:41,550 INFO L78 Accepts]: Start accepts. Automaton has 26432 states and 101334 transitions. Word has length 25 [2022-03-15 15:30:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:41,550 INFO L470 AbstractCegarLoop]: Abstraction has 26432 states and 101334 transitions. [2022-03-15 15:30:41,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-03-15 15:30:41,550 INFO L276 IsEmpty]: Start isEmpty. Operand 26432 states and 101334 transitions. [2022-03-15 15:30:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:41,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:41,611 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:41,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-15 15:30:41,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-03-15 15:30:41,816 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:41,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:41,816 INFO L85 PathProgramCache]: Analyzing trace with hash -431477204, now seen corresponding path program 56 times [2022-03-15 15:30:41,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:41,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893136348] [2022-03-15 15:30:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:41,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:41,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:41,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893136348] [2022-03-15 15:30:41,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893136348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:41,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401627970] [2022-03-15 15:30:41,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:30:41,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:41,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:41,868 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:41,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 15:30:41,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:30:41,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:41,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:41,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:42,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:30:42,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401627970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:42,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:42,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 19 [2022-03-15 15:30:42,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752390105] [2022-03-15 15:30:42,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:42,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:30:42,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:42,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:30:42,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:30:42,132 INFO L87 Difference]: Start difference. First operand 26432 states and 101334 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-03-15 15:30:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:43,356 INFO L93 Difference]: Finished difference Result 30975 states and 114847 transitions. [2022-03-15 15:30:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 15:30:43,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 25 [2022-03-15 15:30:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:43,453 INFO L225 Difference]: With dead ends: 30975 [2022-03-15 15:30:43,453 INFO L226 Difference]: Without dead ends: 30963 [2022-03-15 15:30:43,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=779, Invalid=2643, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 15:30:43,453 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 330 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:43,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 339 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:30:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30963 states. [2022-03-15 15:30:44,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30963 to 26545. [2022-03-15 15:30:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26545 states, 26544 states have (on average 3.8366109101868595) internal successors, (101839), 26544 states have internal predecessors, (101839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26545 states to 26545 states and 101839 transitions. [2022-03-15 15:30:44,404 INFO L78 Accepts]: Start accepts. Automaton has 26545 states and 101839 transitions. Word has length 25 [2022-03-15 15:30:44,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:44,404 INFO L470 AbstractCegarLoop]: Abstraction has 26545 states and 101839 transitions. [2022-03-15 15:30:44,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-03-15 15:30:44,404 INFO L276 IsEmpty]: Start isEmpty. Operand 26545 states and 101839 transitions. [2022-03-15 15:30:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:44,472 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:44,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:44,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-15 15:30:44,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:44,688 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:44,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:44,688 INFO L85 PathProgramCache]: Analyzing trace with hash 115487400, now seen corresponding path program 57 times [2022-03-15 15:30:44,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:44,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285093964] [2022-03-15 15:30:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:44,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:44,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:44,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285093964] [2022-03-15 15:30:44,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285093964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:44,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632712798] [2022-03-15 15:30:44,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:30:44,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:44,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:44,747 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:44,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 15:30:44,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:30:44,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:44,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:44,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:44,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:30:45,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632712798] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:45,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:45,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2022-03-15 15:30:45,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824694814] [2022-03-15 15:30:45,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:45,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:30:45,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:45,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:30:45,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:30:45,029 INFO L87 Difference]: Start difference. First operand 26545 states and 101839 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:46,477 INFO L93 Difference]: Finished difference Result 30437 states and 112928 transitions. [2022-03-15 15:30:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 15:30:46,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:30:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:46,574 INFO L225 Difference]: With dead ends: 30437 [2022-03-15 15:30:46,574 INFO L226 Difference]: Without dead ends: 30425 [2022-03-15 15:30:46,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1196, Invalid=4206, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 15:30:46,575 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 308 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:46,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 439 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:30:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30425 states. [2022-03-15 15:30:47,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30425 to 26710. [2022-03-15 15:30:47,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26710 states, 26709 states have (on average 3.832640682915871) internal successors, (102366), 26709 states have internal predecessors, (102366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26710 states to 26710 states and 102366 transitions. [2022-03-15 15:30:47,274 INFO L78 Accepts]: Start accepts. Automaton has 26710 states and 102366 transitions. Word has length 25 [2022-03-15 15:30:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:47,274 INFO L470 AbstractCegarLoop]: Abstraction has 26710 states and 102366 transitions. [2022-03-15 15:30:47,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 26710 states and 102366 transitions. [2022-03-15 15:30:47,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:47,328 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:47,328 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:47,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-15 15:30:47,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:47,543 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:47,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash -584285904, now seen corresponding path program 58 times [2022-03-15 15:30:47,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:47,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333757119] [2022-03-15 15:30:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:47,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:47,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:47,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333757119] [2022-03-15 15:30:47,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333757119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:47,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311751066] [2022-03-15 15:30:47,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:30:47,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:47,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:47,608 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:47,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-15 15:30:47,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:30:47,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:47,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:47,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:47,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 15:30:47,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311751066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:47,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:47,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2022-03-15 15:30:47,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189696378] [2022-03-15 15:30:47,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:47,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:30:47,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:47,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:30:47,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:30:47,998 INFO L87 Difference]: Start difference. First operand 26710 states and 102366 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:49,896 INFO L93 Difference]: Finished difference Result 43697 states and 157609 transitions. [2022-03-15 15:30:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 15:30:49,897 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:30:49,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:50,110 INFO L225 Difference]: With dead ends: 43697 [2022-03-15 15:30:50,110 INFO L226 Difference]: Without dead ends: 43689 [2022-03-15 15:30:50,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1542, Invalid=5264, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 15:30:50,111 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 491 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:50,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 572 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 15:30:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43689 states. [2022-03-15 15:30:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43689 to 26825. [2022-03-15 15:30:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26825 states, 26824 states have (on average 3.836937071279451) internal successors, (102922), 26824 states have internal predecessors, (102922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26825 states to 26825 states and 102922 transitions. [2022-03-15 15:30:51,163 INFO L78 Accepts]: Start accepts. Automaton has 26825 states and 102922 transitions. Word has length 25 [2022-03-15 15:30:51,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:51,163 INFO L470 AbstractCegarLoop]: Abstraction has 26825 states and 102922 transitions. [2022-03-15 15:30:51,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 26825 states and 102922 transitions. [2022-03-15 15:30:51,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:51,222 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:51,222 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:51,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-15 15:30:51,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-15 15:30:51,435 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:51,436 INFO L85 PathProgramCache]: Analyzing trace with hash 452395820, now seen corresponding path program 59 times [2022-03-15 15:30:51,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:51,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129322872] [2022-03-15 15:30:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:51,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:51,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:51,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129322872] [2022-03-15 15:30:51,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129322872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:51,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961972735] [2022-03-15 15:30:51,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:30:51,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:51,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:51,490 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:51,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-15 15:30:51,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 15:30:51,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:51,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:51,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:51,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 15:30:51,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961972735] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:51,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:51,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2022-03-15 15:30:51,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275606528] [2022-03-15 15:30:51,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:51,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:30:51,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:51,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:30:51,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:30:51,758 INFO L87 Difference]: Start difference. First operand 26825 states and 102922 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:53,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:53,379 INFO L93 Difference]: Finished difference Result 43966 states and 158338 transitions. [2022-03-15 15:30:53,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 15:30:53,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:30:53,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:53,514 INFO L225 Difference]: With dead ends: 43966 [2022-03-15 15:30:53,514 INFO L226 Difference]: Without dead ends: 43940 [2022-03-15 15:30:53,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1604, Invalid=5536, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 15:30:53,515 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 459 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:53,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 487 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:30:53,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43940 states. [2022-03-15 15:30:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43940 to 26799. [2022-03-15 15:30:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26799 states, 26798 states have (on average 3.835286215389208) internal successors, (102778), 26798 states have internal predecessors, (102778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26799 states to 26799 states and 102778 transitions. [2022-03-15 15:30:54,504 INFO L78 Accepts]: Start accepts. Automaton has 26799 states and 102778 transitions. Word has length 25 [2022-03-15 15:30:54,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:54,504 INFO L470 AbstractCegarLoop]: Abstraction has 26799 states and 102778 transitions. [2022-03-15 15:30:54,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:54,505 INFO L276 IsEmpty]: Start isEmpty. Operand 26799 states and 102778 transitions. [2022-03-15 15:30:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:54,559 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:54,559 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:54,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-15 15:30:54,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-15 15:30:54,775 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:54,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:54,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2063114192, now seen corresponding path program 60 times [2022-03-15 15:30:54,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:54,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915338450] [2022-03-15 15:30:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:54,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:54,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:54,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915338450] [2022-03-15 15:30:54,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915338450] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:54,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907130528] [2022-03-15 15:30:54,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:30:54,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:54,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:54,842 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:54,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-15 15:30:54,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:30:54,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:54,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:54,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:54,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:30:55,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907130528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:55,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:55,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-03-15 15:30:55,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468554726] [2022-03-15 15:30:55,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:55,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:30:55,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:30:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:30:55,035 INFO L87 Difference]: Start difference. First operand 26799 states and 102778 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-03-15 15:30:56,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:56,135 INFO L93 Difference]: Finished difference Result 32249 states and 119094 transitions. [2022-03-15 15:30:56,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 15:30:56,135 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 25 [2022-03-15 15:30:56,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:56,239 INFO L225 Difference]: With dead ends: 32249 [2022-03-15 15:30:56,239 INFO L226 Difference]: Without dead ends: 32228 [2022-03-15 15:30:56,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=869, Invalid=3421, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 15:30:56,239 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 472 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:56,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 395 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:30:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32228 states. [2022-03-15 15:30:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32228 to 26934. [2022-03-15 15:30:57,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26934 states, 26933 states have (on average 3.8327702075520738) internal successors, (103228), 26933 states have internal predecessors, (103228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26934 states to 26934 states and 103228 transitions. [2022-03-15 15:30:57,168 INFO L78 Accepts]: Start accepts. Automaton has 26934 states and 103228 transitions. Word has length 25 [2022-03-15 15:30:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:57,169 INFO L470 AbstractCegarLoop]: Abstraction has 26934 states and 103228 transitions. [2022-03-15 15:30:57,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-03-15 15:30:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 26934 states and 103228 transitions. [2022-03-15 15:30:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:30:57,229 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:57,229 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:57,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-15 15:30:57,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-15 15:30:57,445 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:30:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:57,446 INFO L85 PathProgramCache]: Analyzing trace with hash -958519500, now seen corresponding path program 61 times [2022-03-15 15:30:57,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:57,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265911659] [2022-03-15 15:30:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:57,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:57,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:57,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265911659] [2022-03-15 15:30:57,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265911659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:57,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635907102] [2022-03-15 15:30:57,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:30:57,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:57,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:57,494 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:57,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-15 15:30:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:57,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:30:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:57,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:30:57,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635907102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:57,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:57,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-03-15 15:30:57,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377413204] [2022-03-15 15:30:57,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:57,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:30:57,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:57,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:30:57,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:30:57,758 INFO L87 Difference]: Start difference. First operand 26934 states and 103228 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:59,584 INFO L93 Difference]: Finished difference Result 33621 states and 122812 transitions. [2022-03-15 15:30:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 15:30:59,585 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:30:59,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:59,687 INFO L225 Difference]: With dead ends: 33621 [2022-03-15 15:30:59,688 INFO L226 Difference]: Without dead ends: 33603 [2022-03-15 15:30:59,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2357 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1505, Invalid=5635, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 15:30:59,688 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 462 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:59,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 514 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 15:30:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33603 states. [2022-03-15 15:31:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33603 to 26883. [2022-03-15 15:31:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26883 states, 26882 states have (on average 3.831225355256305) internal successors, (102991), 26882 states have internal predecessors, (102991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26883 states to 26883 states and 102991 transitions. [2022-03-15 15:31:00,613 INFO L78 Accepts]: Start accepts. Automaton has 26883 states and 102991 transitions. Word has length 25 [2022-03-15 15:31:00,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:00,613 INFO L470 AbstractCegarLoop]: Abstraction has 26883 states and 102991 transitions. [2022-03-15 15:31:00,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:00,613 INFO L276 IsEmpty]: Start isEmpty. Operand 26883 states and 102991 transitions. [2022-03-15 15:31:00,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:31:00,680 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:00,680 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:00,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-15 15:31:00,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-15 15:31:00,896 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:31:00,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:00,896 INFO L85 PathProgramCache]: Analyzing trace with hash -610544284, now seen corresponding path program 62 times [2022-03-15 15:31:00,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:00,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117496954] [2022-03-15 15:31:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:00,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:00,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:00,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117496954] [2022-03-15 15:31:00,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117496954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:00,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848200874] [2022-03-15 15:31:00,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:31:00,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:00,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:00,952 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:00,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-15 15:31:00,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:31:00,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:00,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:31:00,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:01,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:01,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848200874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:01,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:01,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 15:31:01,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414357831] [2022-03-15 15:31:01,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:01,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:31:01,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:01,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:31:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:31:01,218 INFO L87 Difference]: Start difference. First operand 26883 states and 102991 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:02,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:31:02,409 INFO L93 Difference]: Finished difference Result 31067 states and 115057 transitions. [2022-03-15 15:31:02,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 15:31:02,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:31:02,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:31:02,495 INFO L225 Difference]: With dead ends: 31067 [2022-03-15 15:31:02,495 INFO L226 Difference]: Without dead ends: 30993 [2022-03-15 15:31:02,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=869, Invalid=3421, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 15:31:02,496 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 374 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:31:02,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 274 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:31:02,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30993 states. [2022-03-15 15:31:03,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30993 to 27772. [2022-03-15 15:31:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27772 states, 27771 states have (on average 3.8098015915883474) internal successors, (105802), 27771 states have internal predecessors, (105802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27772 states to 27772 states and 105802 transitions. [2022-03-15 15:31:03,223 INFO L78 Accepts]: Start accepts. Automaton has 27772 states and 105802 transitions. Word has length 25 [2022-03-15 15:31:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:03,223 INFO L470 AbstractCegarLoop]: Abstraction has 27772 states and 105802 transitions. [2022-03-15 15:31:03,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 27772 states and 105802 transitions. [2022-03-15 15:31:03,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:31:03,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:03,436 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:03,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-15 15:31:03,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-15 15:31:03,650 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:31:03,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:03,650 INFO L85 PathProgramCache]: Analyzing trace with hash -103092820, now seen corresponding path program 63 times [2022-03-15 15:31:03,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:03,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653968368] [2022-03-15 15:31:03,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:03,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:03,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:03,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653968368] [2022-03-15 15:31:03,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653968368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:03,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036145033] [2022-03-15 15:31:03,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:31:03,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:03,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:03,712 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:03,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-15 15:31:03,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:31:03,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:03,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:31:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:03,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:04,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036145033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:04,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:04,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-03-15 15:31:04,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044879482] [2022-03-15 15:31:04,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:04,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:31:04,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:31:04,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:31:04,016 INFO L87 Difference]: Start difference. First operand 27772 states and 105802 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:05,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:31:05,521 INFO L93 Difference]: Finished difference Result 31519 states and 116453 transitions. [2022-03-15 15:31:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 15:31:05,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:31:05,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:31:05,745 INFO L225 Difference]: With dead ends: 31519 [2022-03-15 15:31:05,745 INFO L226 Difference]: Without dead ends: 31477 [2022-03-15 15:31:05,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1202, Invalid=4200, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 15:31:05,747 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 389 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:31:05,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 346 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:31:05,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31477 states. [2022-03-15 15:31:06,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31477 to 28378. [2022-03-15 15:31:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28378 states, 28377 states have (on average 3.7997674172745532) internal successors, (107826), 28377 states have internal predecessors, (107826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:06,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28378 states to 28378 states and 107826 transitions. [2022-03-15 15:31:06,490 INFO L78 Accepts]: Start accepts. Automaton has 28378 states and 107826 transitions. Word has length 25 [2022-03-15 15:31:06,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:06,490 INFO L470 AbstractCegarLoop]: Abstraction has 28378 states and 107826 transitions. [2022-03-15 15:31:06,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:06,490 INFO L276 IsEmpty]: Start isEmpty. Operand 28378 states and 107826 transitions. [2022-03-15 15:31:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:31:06,555 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:06,556 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:06,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-15 15:31:06,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-15 15:31:06,771 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:31:06,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:06,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1001501872, now seen corresponding path program 64 times [2022-03-15 15:31:06,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:06,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283619827] [2022-03-15 15:31:06,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:06,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:06,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:06,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283619827] [2022-03-15 15:31:06,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283619827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:06,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45002883] [2022-03-15 15:31:06,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:31:06,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:06,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:06,820 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:06,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-15 15:31:06,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:31:06,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:06,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 15:31:06,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:07,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:31:07,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45002883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:07,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:07,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-03-15 15:31:07,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368522038] [2022-03-15 15:31:07,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:07,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:31:07,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:07,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:31:07,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:31:07,093 INFO L87 Difference]: Start difference. First operand 28378 states and 107826 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-03-15 15:31:08,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:31:08,762 INFO L93 Difference]: Finished difference Result 31870 states and 117402 transitions. [2022-03-15 15:31:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-15 15:31:08,763 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 25 [2022-03-15 15:31:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:31:08,864 INFO L225 Difference]: With dead ends: 31870 [2022-03-15 15:31:08,864 INFO L226 Difference]: Without dead ends: 31852 [2022-03-15 15:31:08,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1606, Invalid=5200, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 15:31:08,865 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 407 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:31:08,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 439 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:31:08,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31852 states. [2022-03-15 15:31:09,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31852 to 28168. [2022-03-15 15:31:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28168 states, 28167 states have (on average 3.804381013242447) internal successors, (107158), 28167 states have internal predecessors, (107158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28168 states to 28168 states and 107158 transitions. [2022-03-15 15:31:09,804 INFO L78 Accepts]: Start accepts. Automaton has 28168 states and 107158 transitions. Word has length 25 [2022-03-15 15:31:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:09,804 INFO L470 AbstractCegarLoop]: Abstraction has 28168 states and 107158 transitions. [2022-03-15 15:31:09,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-03-15 15:31:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 28168 states and 107158 transitions. [2022-03-15 15:31:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:31:09,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:09,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:09,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-15 15:31:10,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:10,086 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:31:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:10,086 INFO L85 PathProgramCache]: Analyzing trace with hash 918492762, now seen corresponding path program 44 times [2022-03-15 15:31:10,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:10,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563517987] [2022-03-15 15:31:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:10,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:10,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:10,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563517987] [2022-03-15 15:31:10,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563517987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:10,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107911238] [2022-03-15 15:31:10,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:31:10,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:10,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:10,118 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:10,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-15 15:31:10,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:31:10,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:10,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:31:10,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:31:10,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:31:10,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107911238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:10,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:10,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-15 15:31:10,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307716044] [2022-03-15 15:31:10,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:10,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:31:10,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:10,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:31:10,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:31:10,274 INFO L87 Difference]: Start difference. First operand 28168 states and 107158 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:10,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:31:10,935 INFO L93 Difference]: Finished difference Result 46026 states and 165452 transitions. [2022-03-15 15:31:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:31:10,935 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 25 [2022-03-15 15:31:10,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:31:11,089 INFO L225 Difference]: With dead ends: 46026 [2022-03-15 15:31:11,089 INFO L226 Difference]: Without dead ends: 46019 [2022-03-15 15:31:11,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:31:11,089 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 229 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:31:11,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 139 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:31:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46019 states. [2022-03-15 15:31:12,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46019 to 32278. [2022-03-15 15:31:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32278 states, 32277 states have (on average 3.817238281128977) internal successors, (123209), 32277 states have internal predecessors, (123209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32278 states to 32278 states and 123209 transitions. [2022-03-15 15:31:12,226 INFO L78 Accepts]: Start accepts. Automaton has 32278 states and 123209 transitions. Word has length 25 [2022-03-15 15:31:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:12,227 INFO L470 AbstractCegarLoop]: Abstraction has 32278 states and 123209 transitions. [2022-03-15 15:31:12,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 32278 states and 123209 transitions. [2022-03-15 15:31:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:31:12,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:12,297 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:12,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-15 15:31:12,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:12,511 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:31:12,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:12,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1754769378, now seen corresponding path program 45 times [2022-03-15 15:31:12,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:12,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774394410] [2022-03-15 15:31:12,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:12,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:12,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:12,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774394410] [2022-03-15 15:31:12,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774394410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:12,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404390989] [2022-03-15 15:31:12,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:31:12,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:12,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:12,538 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:12,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-15 15:31:12,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:31:12,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:12,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:31:12,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:31:12,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:31:12,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404390989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:12,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:12,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-15 15:31:12,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322364625] [2022-03-15 15:31:12,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:12,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:31:12,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:12,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:31:12,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:31:12,651 INFO L87 Difference]: Start difference. First operand 32278 states and 123209 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:13,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:31:13,267 INFO L93 Difference]: Finished difference Result 56282 states and 204646 transitions. [2022-03-15 15:31:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:31:13,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:31:13,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:31:13,476 INFO L225 Difference]: With dead ends: 56282 [2022-03-15 15:31:13,476 INFO L226 Difference]: Without dead ends: 56282 [2022-03-15 15:31:13,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:31:13,477 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 248 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:31:13,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 97 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:31:13,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56282 states. [2022-03-15 15:31:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56282 to 36061. [2022-03-15 15:31:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36061 states, 36060 states have (on average 3.8456461453133666) internal successors, (138674), 36060 states have internal predecessors, (138674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36061 states to 36061 states and 138674 transitions. [2022-03-15 15:31:14,864 INFO L78 Accepts]: Start accepts. Automaton has 36061 states and 138674 transitions. Word has length 25 [2022-03-15 15:31:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:14,864 INFO L470 AbstractCegarLoop]: Abstraction has 36061 states and 138674 transitions. [2022-03-15 15:31:14,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 36061 states and 138674 transitions. [2022-03-15 15:31:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:31:14,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:14,951 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:14,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-15 15:31:15,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:15,167 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:31:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:15,167 INFO L85 PathProgramCache]: Analyzing trace with hash -234712474, now seen corresponding path program 46 times [2022-03-15 15:31:15,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:15,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456719510] [2022-03-15 15:31:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:15,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:15,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:15,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456719510] [2022-03-15 15:31:15,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456719510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:15,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646874813] [2022-03-15 15:31:15,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:31:15,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:15,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:15,209 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:15,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-15 15:31:15,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:31:15,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:15,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:31:15,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:31:15,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:31:15,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646874813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:15,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:15,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-03-15 15:31:15,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371141122] [2022-03-15 15:31:15,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:15,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 15:31:15,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:15,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 15:31:15,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-15 15:31:15,342 INFO L87 Difference]: Start difference. First operand 36061 states and 138674 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:31:15,981 INFO L93 Difference]: Finished difference Result 51397 states and 189538 transitions. [2022-03-15 15:31:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:31:15,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:31:15,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:31:16,180 INFO L225 Difference]: With dead ends: 51397 [2022-03-15 15:31:16,181 INFO L226 Difference]: Without dead ends: 51391 [2022-03-15 15:31:16,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:31:16,181 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 238 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:31:16,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 71 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:31:16,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51391 states. [2022-03-15 15:31:17,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51391 to 36050. [2022-03-15 15:31:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36050 states, 36049 states have (on average 3.844517184942717) internal successors, (138591), 36049 states have internal predecessors, (138591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36050 states to 36050 states and 138591 transitions. [2022-03-15 15:31:17,603 INFO L78 Accepts]: Start accepts. Automaton has 36050 states and 138591 transitions. Word has length 25 [2022-03-15 15:31:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:17,603 INFO L470 AbstractCegarLoop]: Abstraction has 36050 states and 138591 transitions. [2022-03-15 15:31:17,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 36050 states and 138591 transitions. [2022-03-15 15:31:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:31:17,854 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:17,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:17,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-15 15:31:18,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:18,095 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:31:18,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:18,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1248422464, now seen corresponding path program 47 times [2022-03-15 15:31:18,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:18,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278115164] [2022-03-15 15:31:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:18,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:31:18,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:18,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278115164] [2022-03-15 15:31:18,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278115164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:18,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384419011] [2022-03-15 15:31:18,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:31:18,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:18,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:18,125 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:18,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-15 15:31:18,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:31:18,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:18,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:31:18,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:31:18,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:31:18,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384419011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:18,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:18,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-15 15:31:18,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840582983] [2022-03-15 15:31:18,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:18,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:31:18,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:18,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:31:18,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:31:18,266 INFO L87 Difference]: Start difference. First operand 36050 states and 138591 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:31:18,795 INFO L93 Difference]: Finished difference Result 51468 states and 189710 transitions. [2022-03-15 15:31:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:31:18,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:31:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:31:19,019 INFO L225 Difference]: With dead ends: 51468 [2022-03-15 15:31:19,020 INFO L226 Difference]: Without dead ends: 51450 [2022-03-15 15:31:19,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:31:19,020 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 309 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:31:19,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 81 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:31:19,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51450 states. [2022-03-15 15:31:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51450 to 36034. [2022-03-15 15:31:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36034 states, 36033 states have (on average 3.841783920295285) internal successors, (138431), 36033 states have internal predecessors, (138431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:20,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36034 states to 36034 states and 138431 transitions. [2022-03-15 15:31:20,364 INFO L78 Accepts]: Start accepts. Automaton has 36034 states and 138431 transitions. Word has length 25 [2022-03-15 15:31:20,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:20,365 INFO L470 AbstractCegarLoop]: Abstraction has 36034 states and 138431 transitions. [2022-03-15 15:31:20,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:20,365 INFO L276 IsEmpty]: Start isEmpty. Operand 36034 states and 138431 transitions. [2022-03-15 15:31:20,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:31:20,627 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:20,627 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:20,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-15 15:31:20,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-03-15 15:31:20,842 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:31:20,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:20,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1500473020, now seen corresponding path program 48 times [2022-03-15 15:31:20,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:20,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190876079] [2022-03-15 15:31:20,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:20,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:20,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:20,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190876079] [2022-03-15 15:31:20,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190876079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:20,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485102573] [2022-03-15 15:31:20,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:31:20,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:20,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:20,882 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:20,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-15 15:31:20,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:31:20,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:20,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:31:20,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:20,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:21,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485102573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:21,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:21,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 15:31:21,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915155015] [2022-03-15 15:31:21,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:21,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:31:21,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:21,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:31:21,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:31:21,040 INFO L87 Difference]: Start difference. First operand 36034 states and 138431 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) [2022-03-15 15:31:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:31:21,577 INFO L93 Difference]: Finished difference Result 51306 states and 189111 transitions. [2022-03-15 15:31:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:31:21,578 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 15:31:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:31:21,774 INFO L225 Difference]: With dead ends: 51306 [2022-03-15 15:31:21,774 INFO L226 Difference]: Without dead ends: 51276 [2022-03-15 15:31:21,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:31:21,774 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 309 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:31:21,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 79 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:31:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51276 states. [2022-03-15 15:31:22,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51276 to 36160. [2022-03-15 15:31:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36160 states, 36159 states have (on average 3.838103929865317) internal successors, (138782), 36159 states have internal predecessors, (138782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:23,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36160 states to 36160 states and 138782 transitions. [2022-03-15 15:31:23,132 INFO L78 Accepts]: Start accepts. Automaton has 36160 states and 138782 transitions. Word has length 25 [2022-03-15 15:31:23,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:23,132 INFO L470 AbstractCegarLoop]: Abstraction has 36160 states and 138782 transitions. [2022-03-15 15:31:23,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) [2022-03-15 15:31:23,133 INFO L276 IsEmpty]: Start isEmpty. Operand 36160 states and 138782 transitions. [2022-03-15 15:31:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 15:31:23,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:23,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:23,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-15 15:31:23,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-15 15:31:23,591 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:31:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:23,591 INFO L85 PathProgramCache]: Analyzing trace with hash 485420698, now seen corresponding path program 65 times [2022-03-15 15:31:23,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:23,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436412140] [2022-03-15 15:31:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:23,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:23,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:23,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436412140] [2022-03-15 15:31:23,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436412140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:23,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583604394] [2022-03-15 15:31:23,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:31:23,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:23,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:23,635 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:23,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-15 15:31:23,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:31:23,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 15:31:23,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:23,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:31:23,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583604394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:23,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:23,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-15 15:31:23,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733123613] [2022-03-15 15:31:23,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:23,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:31:23,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:23,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:31:23,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:31:23,845 INFO L87 Difference]: Start difference. First operand 36160 states and 138782 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)