/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-820ea7a [2022-02-18 16:50:56,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-18 16:50:56,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-18 16:50:56,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-18 16:50:56,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-18 16:50:56,214 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-18 16:50:56,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-18 16:50:56,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-18 16:50:56,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-18 16:50:56,218 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-18 16:50:56,218 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-18 16:50:56,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-18 16:50:56,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-18 16:50:56,219 INFO L138 SettingsManager]: * Use SBE=true [2022-02-18 16:50:56,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-18 16:50:56,219 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-18 16:50:56,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-18 16:50:56,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-18 16:50:56,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-18 16:50:56,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-18 16:50:56,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-18 16:50:56,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-18 16:50:56,220 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-18 16:50:56,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-18 16:50:56,220 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-18 16:50:56,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-18 16:50:56,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-18 16:50:56,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-18 16:50:56,220 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-18 16:50:56,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-18 16:50:56,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-18 16:50:56,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-18 16:50:56,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-18 16:50:56,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-18 16:50:56,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-18 16:50:56,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-18 16:50:56,221 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-18 16:50:56,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-18 16:50:56,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-18 16:50:56,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-18 16:50:56,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-18 16:50:56,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-18 16:50:56,438 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-18 16:50:56,438 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-18 16:50:56,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl [2022-02-18 16:50:56,440 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl' [2022-02-18 16:50:56,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-18 16:50:56,468 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-18 16:50:56,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-18 16:50:56,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-18 16:50:56,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-18 16:50:56,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:50:56" (1/1) ... [2022-02-18 16:50:56,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:50:56" (1/1) ... [2022-02-18 16:50:56,486 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-18 16:50:56,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-18 16:50:56,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-18 16:50:56,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-18 16:50:56,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-18 16:50:56,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:50:56" (1/1) ... [2022-02-18 16:50:56,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:50:56" (1/1) ... [2022-02-18 16:50:56,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:50:56" (1/1) ... [2022-02-18 16:50:56,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:50:56" (1/1) ... [2022-02-18 16:50:56,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:50:56" (1/1) ... [2022-02-18 16:50:56,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:50:56" (1/1) ... [2022-02-18 16:50:56,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:50:56" (1/1) ... [2022-02-18 16:50:56,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-18 16:50:56,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-18 16:50:56,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-18 16:50:56,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-18 16:50:56,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:50:56" (1/1) ... [2022-02-18 16:50:56,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-18 16:50:56,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:50:56,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-18 16:50:56,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-18 16:50:56,565 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-18 16:50:56,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-18 16:50:56,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-18 16:50:56,565 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-18 16:50:56,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-18 16:50:56,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-18 16:50:56,566 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-18 16:50:56,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-18 16:50:56,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-18 16:50:56,566 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-18 16:50:56,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-18 16:50:56,567 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-18 16:50:56,567 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-02-18 16:50:56,567 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-02-18 16:50:56,567 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-02-18 16:50:56,568 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-18 16:50:56,611 INFO L234 CfgBuilder]: Building ICFG [2022-02-18 16:50:56,612 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-18 16:50:56,688 INFO L275 CfgBuilder]: Performing block encoding [2022-02-18 16:50:56,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-18 16:50:56,701 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-18 16:50:56,702 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:50:56 BoogieIcfgContainer [2022-02-18 16:50:56,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-18 16:50:56,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-18 16:50:56,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-18 16:50:56,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-18 16:50:56,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:50:56" (1/2) ... [2022-02-18 16:50:56,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ff2f57 and model type prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:50:56, skipping insertion in model container [2022-02-18 16:50:56,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:50:56" (2/2) ... [2022-02-18 16:50:56,732 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons3.wvr.bpl [2022-02-18 16:50:56,735 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-18 16:50:56,735 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-18 16:50:56,735 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-18 16:50:56,736 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-18 16:50:56,792 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-02-18 16:50:56,839 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-18 16:50:56,847 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 [2022-02-18 16:50:56,847 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-02-18 16:50:56,859 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 40 transitions, 112 flow [2022-02-18 16:50:56,951 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-18 16:50:56,978 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:50:56,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:50:56,979 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:50:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:50:56,985 INFO L85 PathProgramCache]: Analyzing trace with hash 179406345, now seen corresponding path program 1 times [2022-02-18 16:50:56,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:50:56,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960921627] [2022-02-18 16:50:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:50:56,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:50:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:50:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:50:57,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:50:57,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960921627] [2022-02-18 16:50:57,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960921627] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:50:57,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:50:57,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 16:50:57,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998266545] [2022-02-18 16:50:57,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:50:57,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 16:50:57,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:50:57,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 16:50:57,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:50:57,180 INFO L87 Difference]: Start difference. First operand has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 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 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:50:57,253 INFO L93 Difference]: Finished difference Result 912 states and 3051 transitions. [2022-02-18 16:50:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 16:50:57,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-18 16:50:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:50:57,272 INFO L225 Difference]: With dead ends: 912 [2022-02-18 16:50:57,272 INFO L226 Difference]: Without dead ends: 539 [2022-02-18 16:50:57,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:50:57,277 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:50:57,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:50:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-02-18 16:50:57,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2022-02-18 16:50:57,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 3.163568773234201) internal successors, (1702), 538 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1702 transitions. [2022-02-18 16:50:57,373 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1702 transitions. Word has length 24 [2022-02-18 16:50:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:50:57,374 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1702 transitions. [2022-02-18 16:50:57,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:57,374 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1702 transitions. [2022-02-18 16:50:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-18 16:50:57,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:50:57,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:50:57,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-18 16:50:57,377 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:50:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:50:57,377 INFO L85 PathProgramCache]: Analyzing trace with hash -483784061, now seen corresponding path program 2 times [2022-02-18 16:50:57,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:50:57,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599391362] [2022-02-18 16:50:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:50:57,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:50:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:50:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:50:57,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:50:57,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599391362] [2022-02-18 16:50:57,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599391362] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:50:57,454 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:50:57,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:50:57,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106000698] [2022-02-18 16:50:57,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:50:57,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:50:57,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:50:57,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:50:57,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:50:57,457 INFO L87 Difference]: Start difference. First operand 539 states and 1702 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:50:57,544 INFO L93 Difference]: Finished difference Result 863 states and 2726 transitions. [2022-02-18 16:50:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-18 16:50:57,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-18 16:50:57,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:50:57,551 INFO L225 Difference]: With dead ends: 863 [2022-02-18 16:50:57,552 INFO L226 Difference]: Without dead ends: 671 [2022-02-18 16:50:57,552 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 [2022-02-18 16:50:57,553 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:50:57,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 36 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:50:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-02-18 16:50:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2022-02-18 16:50:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.2208955223880595) internal successors, (2158), 670 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:57,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2158 transitions. [2022-02-18 16:50:57,578 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2158 transitions. Word has length 24 [2022-02-18 16:50:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:50:57,578 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 2158 transitions. [2022-02-18 16:50:57,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:57,579 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2158 transitions. [2022-02-18 16:50:57,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-18 16:50:57,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:50:57,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:50:57,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-18 16:50:57,581 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:50:57,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:50:57,581 INFO L85 PathProgramCache]: Analyzing trace with hash 683624999, now seen corresponding path program 1 times [2022-02-18 16:50:57,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:50:57,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041444381] [2022-02-18 16:50:57,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:50:57,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:50:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:50:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:50:57,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:50:57,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041444381] [2022-02-18 16:50:57,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041444381] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:50:57,608 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:50:57,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 16:50:57,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456737139] [2022-02-18 16:50:57,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:50:57,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 16:50:57,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:50:57,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 16:50:57,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:50:57,610 INFO L87 Difference]: Start difference. First operand 671 states and 2158 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:50:57,633 INFO L93 Difference]: Finished difference Result 752 states and 2398 transitions. [2022-02-18 16:50:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 16:50:57,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-18 16:50:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:50:57,637 INFO L225 Difference]: With dead ends: 752 [2022-02-18 16:50:57,637 INFO L226 Difference]: Without dead ends: 752 [2022-02-18 16:50:57,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:50:57,638 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:50:57,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 43 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:50:57,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-02-18 16:50:57,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2022-02-18 16:50:57,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.193075898801598) internal successors, (2398), 751 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2398 transitions. [2022-02-18 16:50:57,657 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2398 transitions. Word has length 27 [2022-02-18 16:50:57,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:50:57,658 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2398 transitions. [2022-02-18 16:50:57,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:57,659 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2398 transitions. [2022-02-18 16:50:57,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-18 16:50:57,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:50:57,661 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:50:57,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-18 16:50:57,661 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:50:57,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:50:57,662 INFO L85 PathProgramCache]: Analyzing trace with hash -699174524, now seen corresponding path program 1 times [2022-02-18 16:50:57,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:50:57,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003904078] [2022-02-18 16:50:57,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:50:57,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:50:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:50:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:50:57,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:50:57,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003904078] [2022-02-18 16:50:57,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003904078] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:50:57,709 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:50:57,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 16:50:57,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320512136] [2022-02-18 16:50:57,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:50:57,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 16:50:57,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:50:57,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 16:50:57,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:50:57,710 INFO L87 Difference]: Start difference. First operand 752 states and 2398 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:57,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:50:57,747 INFO L93 Difference]: Finished difference Result 800 states and 2514 transitions. [2022-02-18 16:50:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 16:50:57,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-18 16:50:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:50:57,751 INFO L225 Difference]: With dead ends: 800 [2022-02-18 16:50:57,751 INFO L226 Difference]: Without dead ends: 774 [2022-02-18 16:50:57,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:50:57,752 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:50:57,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:50:57,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-02-18 16:50:57,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 774. [2022-02-18 16:50:57,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.1720569210866754) internal successors, (2452), 773 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2452 transitions. [2022-02-18 16:50:57,770 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2452 transitions. Word has length 31 [2022-02-18 16:50:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:50:57,770 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 2452 transitions. [2022-02-18 16:50:57,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:57,770 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2452 transitions. [2022-02-18 16:50:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-18 16:50:57,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:50:57,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:50:57,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-18 16:50:57,773 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:50:57,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:50:57,774 INFO L85 PathProgramCache]: Analyzing trace with hash 555677261, now seen corresponding path program 1 times [2022-02-18 16:50:57,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:50:57,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927467652] [2022-02-18 16:50:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:50:57,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:50:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:50:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:50:58,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:50:58,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927467652] [2022-02-18 16:50:58,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927467652] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:50:58,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671552870] [2022-02-18 16:50:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:50:58,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:50:58,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:50:58,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:50:58,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-18 16:50:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:50:58,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-18 16:50:58,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:50:58,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-18 16:50:58,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-18 16:50:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:50:58,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:50:58,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:50:58,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-18 16:50:58,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:50:58,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-02-18 16:50:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:50:58,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671552870] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:50:58,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:50:58,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-02-18 16:50:58,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148731174] [2022-02-18 16:50:58,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:50:58,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 16:50:58,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:50:58,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 16:50:58,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-02-18 16:50:58,860 INFO L87 Difference]: Start difference. First operand 774 states and 2452 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:59,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:50:59,919 INFO L93 Difference]: Finished difference Result 2142 states and 6646 transitions. [2022-02-18 16:50:59,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-18 16:50:59,920 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-18 16:50:59,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:50:59,927 INFO L225 Difference]: With dead ends: 2142 [2022-02-18 16:50:59,927 INFO L226 Difference]: Without dead ends: 1716 [2022-02-18 16:50:59,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=586, Invalid=2384, Unknown=0, NotChecked=0, Total=2970 [2022-02-18 16:50:59,929 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 517 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:50:59,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 330 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 16:50:59,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-02-18 16:50:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 906. [2022-02-18 16:50:59,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.2132596685082873) internal successors, (2908), 905 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2908 transitions. [2022-02-18 16:50:59,953 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2908 transitions. Word has length 34 [2022-02-18 16:50:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:50:59,953 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2908 transitions. [2022-02-18 16:50:59,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:50:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2908 transitions. [2022-02-18 16:50:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-18 16:50:59,955 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:50:59,955 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:50:59,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-18 16:51:00,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:51:00,174 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:51:00,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:51:00,174 INFO L85 PathProgramCache]: Analyzing trace with hash 561664541, now seen corresponding path program 2 times [2022-02-18 16:51:00,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:51:00,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705554834] [2022-02-18 16:51:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:51:00,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:51:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:51:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:51:00,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:51:00,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705554834] [2022-02-18 16:51:00,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705554834] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:51:00,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28930209] [2022-02-18 16:51:00,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:51:00,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:51:00,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:51:00,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:51:00,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-18 16:51:00,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:51:00,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:51:00,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-18 16:51:00,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:51:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:51:00,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-18 16:51:00,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28930209] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:51:00,298 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-18 16:51:00,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-02-18 16:51:00,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517038267] [2022-02-18 16:51:00,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:51:00,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:51:00,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:51:00,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:51:00,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:51:00,299 INFO L87 Difference]: Start difference. First operand 906 states and 2908 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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) [2022-02-18 16:51:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:51:00,328 INFO L93 Difference]: Finished difference Result 2380 states and 7576 transitions. [2022-02-18 16:51:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:51:00,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 37 [2022-02-18 16:51:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:51:00,337 INFO L225 Difference]: With dead ends: 2380 [2022-02-18 16:51:00,337 INFO L226 Difference]: Without dead ends: 2330 [2022-02-18 16:51:00,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:51:00,338 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 63 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:51:00,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 68 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:51:00,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2022-02-18 16:51:00,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1654. [2022-02-18 16:51:00,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.327283726557774) internal successors, (5500), 1653 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:51:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5500 transitions. [2022-02-18 16:51:00,376 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5500 transitions. Word has length 37 [2022-02-18 16:51:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:51:00,377 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 5500 transitions. [2022-02-18 16:51:00,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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) [2022-02-18 16:51:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5500 transitions. [2022-02-18 16:51:00,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-18 16:51:00,380 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:51:00,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:51:00,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-18 16:51:00,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-02-18 16:51:00,596 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:51:00,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:51:00,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1536215610, now seen corresponding path program 3 times [2022-02-18 16:51:00,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:51:00,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368903912] [2022-02-18 16:51:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:51:00,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:51:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:51:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-18 16:51:00,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:51:00,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368903912] [2022-02-18 16:51:00,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368903912] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:51:00,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32239045] [2022-02-18 16:51:00,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:51:00,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:51:00,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:51:00,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:51:00,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-18 16:51:00,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-18 16:51:00,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:51:00,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-18 16:51:00,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:51:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-18 16:51:00,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-18 16:51:00,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32239045] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:51:00,724 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-18 16:51:00,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-02-18 16:51:00,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580420575] [2022-02-18 16:51:00,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:51:00,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:51:00,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:51:00,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:51:00,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:51:00,726 INFO L87 Difference]: Start difference. First operand 1654 states and 5500 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:51:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:51:00,764 INFO L93 Difference]: Finished difference Result 4845 states and 15851 transitions. [2022-02-18 16:51:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:51:00,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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 41 [2022-02-18 16:51:00,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:51:00,786 INFO L225 Difference]: With dead ends: 4845 [2022-02-18 16:51:00,787 INFO L226 Difference]: Without dead ends: 4554 [2022-02-18 16:51:00,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:51:00,788 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:51:00,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 61 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:51:00,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2022-02-18 16:51:00,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3828. [2022-02-18 16:51:00,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 3.367650901489417) internal successors, (12888), 3827 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:51:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 12888 transitions. [2022-02-18 16:51:00,914 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 12888 transitions. Word has length 41 [2022-02-18 16:51:00,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:51:00,914 INFO L470 AbstractCegarLoop]: Abstraction has 3828 states and 12888 transitions. [2022-02-18 16:51:00,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:51:00,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 12888 transitions. [2022-02-18 16:51:00,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:51:00,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:51:00,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:51:00,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-18 16:51:01,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:51:01,139 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:51:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:51:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash 621598743, now seen corresponding path program 4 times [2022-02-18 16:51:01,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:51:01,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184267142] [2022-02-18 16:51:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:51:01,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:51:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:51:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:51:01,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:51:01,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184267142] [2022-02-18 16:51:01,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184267142] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:51:01,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678097843] [2022-02-18 16:51:01,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:51:01,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:51:01,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:51:01,510 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:51:01,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-18 16:51:01,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:51:01,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:51:01,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:51:01,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:51:02,108 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:51:02,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 16:51:02,195 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:51:02,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:51:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:51:02,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:51:02,601 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:51:02,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:51:02,843 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:51:02,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:51:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:51:03,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678097843] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:51:03,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:51:03,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 48 [2022-02-18 16:51:03,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255617264] [2022-02-18 16:51:03,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:51:03,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-18 16:51:03,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:51:03,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-18 16:51:03,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1983, Unknown=0, NotChecked=0, Total=2256 [2022-02-18 16:51:03,140 INFO L87 Difference]: Start difference. First operand 3828 states and 12888 transitions. Second operand has 48 states, 48 states have (on average 2.0625) internal successors, (99), 48 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:51:49,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:51:49,833 INFO L93 Difference]: Finished difference Result 51739 states and 168758 transitions. [2022-02-18 16:51:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 656 states. [2022-02-18 16:51:49,834 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 48 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:51:49,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:51:50,013 INFO L225 Difference]: With dead ends: 51739 [2022-02-18 16:51:50,014 INFO L226 Difference]: Without dead ends: 44084 [2022-02-18 16:51:50,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 698 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237275 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=55167, Invalid=434133, Unknown=0, NotChecked=0, Total=489300 [2022-02-18 16:51:50,049 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 4921 mSDsluCounter, 4563 mSDsCounter, 0 mSdLazyCounter, 7578 mSolverCounterSat, 1771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4921 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 9349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1771 IncrementalHoareTripleChecker+Valid, 7578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:51:50,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4921 Valid, 2500 Invalid, 9349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1771 Valid, 7578 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-18 16:51:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44084 states. [2022-02-18 16:51:50,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44084 to 6431. [2022-02-18 16:51:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6431 states, 6430 states have (on average 3.4334370139968895) internal successors, (22077), 6430 states have internal predecessors, (22077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:51:50,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6431 states to 6431 states and 22077 transitions. [2022-02-18 16:51:50,678 INFO L78 Accepts]: Start accepts. Automaton has 6431 states and 22077 transitions. Word has length 44 [2022-02-18 16:51:50,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:51:50,679 INFO L470 AbstractCegarLoop]: Abstraction has 6431 states and 22077 transitions. [2022-02-18 16:51:50,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 48 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:51:50,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6431 states and 22077 transitions. [2022-02-18 16:51:50,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:51:50,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:51:50,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:51:50,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-18 16:51:50,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:51:50,909 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:51:50,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:51:50,911 INFO L85 PathProgramCache]: Analyzing trace with hash -857814709, now seen corresponding path program 5 times [2022-02-18 16:51:50,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:51:50,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929851837] [2022-02-18 16:51:50,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:51:50,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:51:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:51:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:51:51,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:51:51,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929851837] [2022-02-18 16:51:51,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929851837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:51:51,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304868194] [2022-02-18 16:51:51,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:51:51,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:51:51,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:51:51,238 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:51:51,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-18 16:51:51,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-18 16:51:51,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:51:51,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-18 16:51:51,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:51:51,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 16:51:51,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 16:51:51,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:51:51,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-18 16:51:51,912 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:51:51,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:51:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:51:51,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:51:52,177 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:51:52,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:51:52,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:51:52,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:51:52,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:51:52,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-02-18 16:51:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:51:52,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304868194] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:51:52,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:51:52,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2022-02-18 16:51:52,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350184787] [2022-02-18 16:51:52,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:51:52,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-18 16:51:52,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:51:52,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-18 16:51:52,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1883, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 16:51:52,752 INFO L87 Difference]: Start difference. First operand 6431 states and 22077 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:52:17,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:52:17,282 INFO L93 Difference]: Finished difference Result 57685 states and 186519 transitions. [2022-02-18 16:52:17,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 408 states. [2022-02-18 16:52:17,282 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:52:17,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:52:17,517 INFO L225 Difference]: With dead ends: 57685 [2022-02-18 16:52:17,517 INFO L226 Difference]: Without dead ends: 56637 [2022-02-18 16:52:17,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 449 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93059 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=27309, Invalid=175641, Unknown=0, NotChecked=0, Total=202950 [2022-02-18 16:52:17,531 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 2145 mSDsluCounter, 3967 mSDsCounter, 0 mSdLazyCounter, 8137 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2145 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 9032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 8137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:52:17,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2145 Valid, 1803 Invalid, 9032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 8137 Invalid, 0 Unknown, 189 Unchecked, 3.9s Time] [2022-02-18 16:52:17,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56637 states. [2022-02-18 16:52:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56637 to 7979. [2022-02-18 16:52:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7979 states, 7978 states have (on average 3.422787666081725) internal successors, (27307), 7978 states have internal predecessors, (27307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:52:18,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7979 states to 7979 states and 27307 transitions. [2022-02-18 16:52:18,200 INFO L78 Accepts]: Start accepts. Automaton has 7979 states and 27307 transitions. Word has length 44 [2022-02-18 16:52:18,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:52:18,202 INFO L470 AbstractCegarLoop]: Abstraction has 7979 states and 27307 transitions. [2022-02-18 16:52:18,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:52:18,202 INFO L276 IsEmpty]: Start isEmpty. Operand 7979 states and 27307 transitions. [2022-02-18 16:52:18,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:52:18,221 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:52:18,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:52:18,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-18 16:52:18,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:52:18,446 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:52:18,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:52:18,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1365138515, now seen corresponding path program 6 times [2022-02-18 16:52:18,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:52:18,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403550224] [2022-02-18 16:52:18,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:52:18,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:52:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:52:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:52:18,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:52:18,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403550224] [2022-02-18 16:52:18,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403550224] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:52:18,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31011282] [2022-02-18 16:52:18,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:52:18,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:52:18,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:52:18,764 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:52:18,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-18 16:52:18,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-18 16:52:18,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:52:18,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:52:18,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:52:19,163 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:52:19,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 16:52:19,317 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:52:19,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:52:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:52:19,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:52:19,606 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:52:19,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:52:19,877 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:52:19,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:52:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:52:20,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31011282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:52:20,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:52:20,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-02-18 16:52:20,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536314990] [2022-02-18 16:52:20,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:52:20,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-18 16:52:20,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:52:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-18 16:52:20,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2022-02-18 16:52:20,154 INFO L87 Difference]: Start difference. First operand 7979 states and 27307 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:52:50,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:52:50,785 INFO L93 Difference]: Finished difference Result 70182 states and 229734 transitions. [2022-02-18 16:52:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 483 states. [2022-02-18 16:52:50,785 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:52:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:52:51,256 INFO L225 Difference]: With dead ends: 70182 [2022-02-18 16:52:51,256 INFO L226 Difference]: Without dead ends: 68860 [2022-02-18 16:52:51,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126510 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=32128, Invalid=245074, Unknown=0, NotChecked=0, Total=277202 [2022-02-18 16:52:51,265 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 2422 mSDsluCounter, 3253 mSDsCounter, 0 mSdLazyCounter, 7200 mSolverCounterSat, 868 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2422 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 8068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 868 IncrementalHoareTripleChecker+Valid, 7200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:52:51,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2422 Valid, 1424 Invalid, 8068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [868 Valid, 7200 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-18 16:52:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68860 states. [2022-02-18 16:52:51,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68860 to 8486. [2022-02-18 16:52:51,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8486 states, 8485 states have (on average 3.4238067177371834) internal successors, (29051), 8485 states have internal predecessors, (29051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:52:51,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8486 states to 8486 states and 29051 transitions. [2022-02-18 16:52:51,899 INFO L78 Accepts]: Start accepts. Automaton has 8486 states and 29051 transitions. Word has length 44 [2022-02-18 16:52:51,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:52:51,900 INFO L470 AbstractCegarLoop]: Abstraction has 8486 states and 29051 transitions. [2022-02-18 16:52:51,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:52:51,900 INFO L276 IsEmpty]: Start isEmpty. Operand 8486 states and 29051 transitions. [2022-02-18 16:52:51,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:52:51,915 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:52:51,915 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:52:51,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-18 16:52:52,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:52:52,131 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:52:52,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:52:52,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2011749771, now seen corresponding path program 7 times [2022-02-18 16:52:52,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:52:52,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89016333] [2022-02-18 16:52:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:52:52,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:52:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:52:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:52:52,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:52:52,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89016333] [2022-02-18 16:52:52,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89016333] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:52:52,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148128498] [2022-02-18 16:52:52,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:52:52,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:52:52,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:52:52,512 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:52:52,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-18 16:52:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:52:52,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:52:52,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:52:52,897 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:52:52,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-02-18 16:52:53,037 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:52:53,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:52:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:52:53,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:52:53,347 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:52:53,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:52:53,610 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:52:53,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:52:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:52:53,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148128498] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:52:53,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:52:53,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-02-18 16:52:53,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220534143] [2022-02-18 16:52:53,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:52:53,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-18 16:52:53,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:52:53,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-18 16:52:53,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2092, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 16:52:53,957 INFO L87 Difference]: Start difference. First operand 8486 states and 29051 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:53:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:53:30,699 INFO L93 Difference]: Finished difference Result 99443 states and 325378 transitions. [2022-02-18 16:53:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 541 states. [2022-02-18 16:53:30,699 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:53:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:53:31,011 INFO L225 Difference]: With dead ends: 99443 [2022-02-18 16:53:31,011 INFO L226 Difference]: Without dead ends: 96214 [2022-02-18 16:53:31,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 584 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159241 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=39564, Invalid=303246, Unknown=0, NotChecked=0, Total=342810 [2022-02-18 16:53:31,025 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 3202 mSDsluCounter, 3237 mSDsCounter, 0 mSdLazyCounter, 7149 mSolverCounterSat, 1178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3202 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 8327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1178 IncrementalHoareTripleChecker+Valid, 7149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:53:31,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3202 Valid, 1454 Invalid, 8327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1178 Valid, 7149 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-18 16:53:31,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96214 states. [2022-02-18 16:53:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96214 to 10781. [2022-02-18 16:53:32,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10781 states, 10780 states have (on average 3.4189239332096477) internal successors, (36856), 10780 states have internal predecessors, (36856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:53:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10781 states to 10781 states and 36856 transitions. [2022-02-18 16:53:32,088 INFO L78 Accepts]: Start accepts. Automaton has 10781 states and 36856 transitions. Word has length 44 [2022-02-18 16:53:32,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:53:32,089 INFO L470 AbstractCegarLoop]: Abstraction has 10781 states and 36856 transitions. [2022-02-18 16:53:32,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:53:32,089 INFO L276 IsEmpty]: Start isEmpty. Operand 10781 states and 36856 transitions. [2022-02-18 16:53:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:53:32,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:53:32,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:53:32,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-18 16:53:32,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:53:32,324 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:53:32,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:53:32,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1976679839, now seen corresponding path program 8 times [2022-02-18 16:53:32,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:53:32,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009132577] [2022-02-18 16:53:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:53:32,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:53:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:53:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:53:32,644 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:53:32,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009132577] [2022-02-18 16:53:32,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009132577] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:53:32,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070983467] [2022-02-18 16:53:32,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:53:32,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:53:32,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:53:32,646 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:53:32,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-18 16:53:32,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:53:32,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:53:32,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:53:32,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:53:33,110 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:53:33,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 16:53:33,228 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:53:33,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:53:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:53:33,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:53:33,531 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:53:33,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:53:33,832 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:53:33,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:53:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:53:34,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070983467] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:53:34,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:53:34,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-02-18 16:53:34,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833060227] [2022-02-18 16:53:34,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:53:34,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-18 16:53:34,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:53:34,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-18 16:53:34,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1999, Unknown=0, NotChecked=0, Total=2256 [2022-02-18 16:53:34,103 INFO L87 Difference]: Start difference. First operand 10781 states and 36856 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:53:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:53:55,927 INFO L93 Difference]: Finished difference Result 72714 states and 237510 transitions. [2022-02-18 16:53:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2022-02-18 16:53:55,928 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:53:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:53:56,128 INFO L225 Difference]: With dead ends: 72714 [2022-02-18 16:53:56,128 INFO L226 Difference]: Without dead ends: 71522 [2022-02-18 16:53:56,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72497 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=19555, Invalid=144875, Unknown=0, NotChecked=0, Total=164430 [2022-02-18 16:53:56,137 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 2532 mSDsluCounter, 2681 mSDsCounter, 0 mSdLazyCounter, 5890 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2532 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 6833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 5890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:53:56,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2532 Valid, 1214 Invalid, 6833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 5890 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-18 16:53:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71522 states. [2022-02-18 16:53:56,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71522 to 10918. [2022-02-18 16:53:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10918 states, 10917 states have (on average 3.418887972886324) internal successors, (37324), 10917 states have internal predecessors, (37324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:53:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10918 states to 10918 states and 37324 transitions. [2022-02-18 16:53:56,872 INFO L78 Accepts]: Start accepts. Automaton has 10918 states and 37324 transitions. Word has length 44 [2022-02-18 16:53:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:53:56,872 INFO L470 AbstractCegarLoop]: Abstraction has 10918 states and 37324 transitions. [2022-02-18 16:53:56,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:53:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 10918 states and 37324 transitions. [2022-02-18 16:53:56,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:53:56,890 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:53:56,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:53:56,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-18 16:53:57,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-18 16:53:57,099 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:53:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:53:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1400208447, now seen corresponding path program 9 times [2022-02-18 16:53:57,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:53:57,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974399915] [2022-02-18 16:53:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:53:57,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:53:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:53:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:53:57,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:53:57,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974399915] [2022-02-18 16:53:57,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974399915] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:53:57,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984726168] [2022-02-18 16:53:57,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:53:57,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:53:57,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:53:57,414 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:53:57,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-18 16:53:57,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-18 16:53:57,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:53:57,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-18 16:53:57,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:53:57,849 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:53:57,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 16:53:58,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 16:53:58,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:53:58,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:53:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:53:58,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:53:58,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:53:58,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:53:58,440 INFO L244 Elim1Store]: Index analysis took 130 ms [2022-02-18 16:53:58,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:53:58,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-02-18 16:53:58,775 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:53:58,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2022-02-18 16:53:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:53:59,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984726168] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:53:59,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:53:59,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-02-18 16:53:59,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437103937] [2022-02-18 16:53:59,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:53:59,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-18 16:53:59,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:53:59,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-18 16:53:59,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2053, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 16:53:59,130 INFO L87 Difference]: Start difference. First operand 10918 states and 37324 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:54:39,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:54:39,174 INFO L93 Difference]: Finished difference Result 101348 states and 328669 transitions. [2022-02-18 16:54:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 547 states. [2022-02-18 16:54:39,174 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:54:39,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:54:39,608 INFO L225 Difference]: With dead ends: 101348 [2022-02-18 16:54:39,608 INFO L226 Difference]: Without dead ends: 99757 [2022-02-18 16:54:39,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 590 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166472 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=44693, Invalid=305179, Unknown=0, NotChecked=0, Total=349872 [2022-02-18 16:54:39,620 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 2786 mSDsluCounter, 4485 mSDsCounter, 0 mSdLazyCounter, 7935 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2786 SdHoareTripleChecker+Valid, 2109 SdHoareTripleChecker+Invalid, 9949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 7935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1017 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:54:39,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2786 Valid, 2109 Invalid, 9949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 7935 Invalid, 0 Unknown, 1017 Unchecked, 4.0s Time] [2022-02-18 16:54:39,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99757 states. [2022-02-18 16:54:40,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99757 to 11675. [2022-02-18 16:54:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11675 states, 11674 states have (on average 3.4306150419736166) internal successors, (40049), 11674 states have internal predecessors, (40049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:54:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11675 states to 11675 states and 40049 transitions. [2022-02-18 16:54:40,631 INFO L78 Accepts]: Start accepts. Automaton has 11675 states and 40049 transitions. Word has length 44 [2022-02-18 16:54:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:54:40,631 INFO L470 AbstractCegarLoop]: Abstraction has 11675 states and 40049 transitions. [2022-02-18 16:54:40,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:54:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 11675 states and 40049 transitions. [2022-02-18 16:54:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:54:40,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:54:40,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:54:40,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-18 16:54:40,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-18 16:54:40,850 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:54:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:54:40,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2066642255, now seen corresponding path program 10 times [2022-02-18 16:54:40,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:54:40,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713378413] [2022-02-18 16:54:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:54:40,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:54:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:54:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:54:41,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:54:41,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713378413] [2022-02-18 16:54:41,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713378413] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:54:41,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998489346] [2022-02-18 16:54:41,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:54:41,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:54:41,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:54:41,133 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:54:41,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-18 16:54:41,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:54:41,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:54:41,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:54:41,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:54:41,609 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:54:41,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 16:54:41,687 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:54:41,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:54:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:54:41,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:54:41,987 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:54:41,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:54:42,221 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:54:42,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:54:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:54:42,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998489346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:54:42,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:54:42,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-02-18 16:54:42,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655952232] [2022-02-18 16:54:42,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:54:42,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-18 16:54:42,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:54:42,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-18 16:54:42,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2089, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 16:54:42,608 INFO L87 Difference]: Start difference. First operand 11675 states and 40049 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:55:09,097 INFO L93 Difference]: Finished difference Result 80755 states and 263729 transitions. [2022-02-18 16:55:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2022-02-18 16:55:09,097 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:55:09,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:55:09,447 INFO L225 Difference]: With dead ends: 80755 [2022-02-18 16:55:09,447 INFO L226 Difference]: Without dead ends: 78558 [2022-02-18 16:55:09,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88918 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=24364, Invalid=174998, Unknown=0, NotChecked=0, Total=199362 [2022-02-18 16:55:09,453 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 3489 mSDsluCounter, 2162 mSDsCounter, 0 mSdLazyCounter, 6434 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 7534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 6434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:55:09,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3489 Valid, 786 Invalid, 7534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 6434 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-18 16:55:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78558 states. [2022-02-18 16:55:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78558 to 11362. [2022-02-18 16:55:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11362 states, 11361 states have (on average 3.423466244168647) internal successors, (38894), 11361 states have internal predecessors, (38894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11362 states to 11362 states and 38894 transitions. [2022-02-18 16:55:10,081 INFO L78 Accepts]: Start accepts. Automaton has 11362 states and 38894 transitions. Word has length 44 [2022-02-18 16:55:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:55:10,081 INFO L470 AbstractCegarLoop]: Abstraction has 11362 states and 38894 transitions. [2022-02-18 16:55:10,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 11362 states and 38894 transitions. [2022-02-18 16:55:10,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:55:10,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:55:10,100 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:55:10,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-18 16:55:10,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-18 16:55:10,301 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:55:10,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:55:10,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1494512399, now seen corresponding path program 11 times [2022-02-18 16:55:10,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:55:10,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21998612] [2022-02-18 16:55:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:55:10,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:55:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:55:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:55:10,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:55:10,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21998612] [2022-02-18 16:55:10,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21998612] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:55:10,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237245179] [2022-02-18 16:55:10,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:55:10,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:55:10,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:55:10,590 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:55:10,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-18 16:55:10,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-18 16:55:10,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:55:10,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-18 16:55:10,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:55:10,973 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:55:10,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-02-18 16:55:11,125 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:55:11,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:55:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:55:11,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:55:11,309 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:55:11,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:55:11,572 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:55:11,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:55:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:55:11,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237245179] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:55:11,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:55:11,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2022-02-18 16:55:11,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517333479] [2022-02-18 16:55:11,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:55:11,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-18 16:55:11,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:55:11,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-18 16:55:11,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1911, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 16:55:11,977 INFO L87 Difference]: Start difference. First operand 11362 states and 38894 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:24,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:55:24,367 INFO L93 Difference]: Finished difference Result 42157 states and 138706 transitions. [2022-02-18 16:55:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-02-18 16:55:24,368 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:55:24,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:55:24,476 INFO L225 Difference]: With dead ends: 42157 [2022-02-18 16:55:24,477 INFO L226 Difference]: Without dead ends: 41447 [2022-02-18 16:55:24,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24671 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=9024, Invalid=55238, Unknown=0, NotChecked=0, Total=64262 [2022-02-18 16:55:24,480 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 1602 mSDsluCounter, 2068 mSDsCounter, 0 mSdLazyCounter, 6119 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 6593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 6119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:55:24,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1602 Valid, 650 Invalid, 6593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 6119 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-18 16:55:24,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41447 states. [2022-02-18 16:55:24,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41447 to 11393. [2022-02-18 16:55:24,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11393 states, 11392 states have (on average 3.424683988764045) internal successors, (39014), 11392 states have internal predecessors, (39014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11393 states to 11393 states and 39014 transitions. [2022-02-18 16:55:24,892 INFO L78 Accepts]: Start accepts. Automaton has 11393 states and 39014 transitions. Word has length 44 [2022-02-18 16:55:24,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:55:24,892 INFO L470 AbstractCegarLoop]: Abstraction has 11393 states and 39014 transitions. [2022-02-18 16:55:24,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:24,892 INFO L276 IsEmpty]: Start isEmpty. Operand 11393 states and 39014 transitions. [2022-02-18 16:55:24,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:55:24,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:55:24,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:55:24,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-18 16:55:25,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-18 16:55:25,109 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:55:25,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:55:25,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1850385115, now seen corresponding path program 12 times [2022-02-18 16:55:25,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:55:25,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290371998] [2022-02-18 16:55:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:55:25,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:55:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:55:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:55:25,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:55:25,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290371998] [2022-02-18 16:55:25,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290371998] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:55:25,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470930303] [2022-02-18 16:55:25,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:55:25,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:55:25,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:55:25,388 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:55:25,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-18 16:55:25,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-18 16:55:25,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:55:25,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:55:25,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:55:25,761 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:55:25,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 16:55:25,939 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:55:25,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:55:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:55:26,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:55:26,121 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:55:26,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:55:26,404 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:55:26,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:55:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:55:26,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470930303] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:55:26,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:55:26,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2022-02-18 16:55:26,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713704397] [2022-02-18 16:55:26,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:55:26,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-18 16:55:26,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:55:26,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-18 16:55:26,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 16:55:26,675 INFO L87 Difference]: Start difference. First operand 11393 states and 39014 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:31,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:55:31,155 INFO L93 Difference]: Finished difference Result 25242 states and 83256 transitions. [2022-02-18 16:55:31,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-18 16:55:31,155 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:55:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:55:31,222 INFO L225 Difference]: With dead ends: 25242 [2022-02-18 16:55:31,222 INFO L226 Difference]: Without dead ends: 24864 [2022-02-18 16:55:31,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2085, Invalid=11957, Unknown=0, NotChecked=0, Total=14042 [2022-02-18 16:55:31,225 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1110 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 3535 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 3823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 3535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:55:31,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 596 Invalid, 3823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 3535 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-18 16:55:31,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24864 states. [2022-02-18 16:55:31,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24864 to 11332. [2022-02-18 16:55:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11332 states, 11331 states have (on average 3.4248521754478864) internal successors, (38807), 11331 states have internal predecessors, (38807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11332 states to 11332 states and 38807 transitions. [2022-02-18 16:55:31,557 INFO L78 Accepts]: Start accepts. Automaton has 11332 states and 38807 transitions. Word has length 44 [2022-02-18 16:55:31,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:55:31,557 INFO L470 AbstractCegarLoop]: Abstraction has 11332 states and 38807 transitions. [2022-02-18 16:55:31,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 11332 states and 38807 transitions. [2022-02-18 16:55:31,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:55:31,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:55:31,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:55:31,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-18 16:55:31,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-18 16:55:31,775 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:55:31,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:55:31,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1937258375, now seen corresponding path program 13 times [2022-02-18 16:55:31,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:55:31,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257131421] [2022-02-18 16:55:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:55:31,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:55:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:55:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:55:32,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:55:32,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257131421] [2022-02-18 16:55:32,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257131421] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:55:32,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572437204] [2022-02-18 16:55:32,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:55:32,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:55:32,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:55:32,084 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:55:32,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-18 16:55:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:55:32,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:55:32,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:55:32,476 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:55:32,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 16:55:32,636 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:55:32,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:55:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:55:32,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:55:32,858 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:55:32,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:55:33,178 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:55:33,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:55:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:55:33,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572437204] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:55:33,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:55:33,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-02-18 16:55:33,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534876215] [2022-02-18 16:55:33,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:55:33,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-18 16:55:33,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:55:33,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-18 16:55:33,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2022-02-18 16:55:33,476 INFO L87 Difference]: Start difference. First operand 11332 states and 38807 transitions. Second operand has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 48 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:55:39,551 INFO L93 Difference]: Finished difference Result 26568 states and 87720 transitions. [2022-02-18 16:55:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-18 16:55:39,551 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 48 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:55:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:55:39,626 INFO L225 Difference]: With dead ends: 26568 [2022-02-18 16:55:39,626 INFO L226 Difference]: Without dead ends: 26148 [2022-02-18 16:55:39,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6546 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3190, Invalid=17980, Unknown=0, NotChecked=0, Total=21170 [2022-02-18 16:55:39,628 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 1102 mSDsluCounter, 2178 mSDsCounter, 0 mSdLazyCounter, 4916 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 5196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 4916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:55:39,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1102 Valid, 795 Invalid, 5196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 4916 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-18 16:55:39,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26148 states. [2022-02-18 16:55:39,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26148 to 11503. [2022-02-18 16:55:39,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11503 states, 11502 states have (on average 3.4241870978960183) internal successors, (39385), 11502 states have internal predecessors, (39385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11503 states to 11503 states and 39385 transitions. [2022-02-18 16:55:39,972 INFO L78 Accepts]: Start accepts. Automaton has 11503 states and 39385 transitions. Word has length 44 [2022-02-18 16:55:39,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:55:39,972 INFO L470 AbstractCegarLoop]: Abstraction has 11503 states and 39385 transitions. [2022-02-18 16:55:39,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 48 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 11503 states and 39385 transitions. [2022-02-18 16:55:39,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:55:39,993 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:55:39,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:55:40,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-18 16:55:40,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-18 16:55:40,194 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:55:40,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:55:40,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1019179365, now seen corresponding path program 14 times [2022-02-18 16:55:40,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:55:40,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134215533] [2022-02-18 16:55:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:55:40,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:55:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:55:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:55:40,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:55:40,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134215533] [2022-02-18 16:55:40,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134215533] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:55:40,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034783458] [2022-02-18 16:55:40,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:55:40,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:55:40,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:55:40,472 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:55:40,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-18 16:55:40,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:55:40,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:55:40,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:55:40,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:55:40,838 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:55:40,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 16:55:40,983 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:55:40,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:55:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:55:41,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:55:41,220 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:55:41,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:55:41,479 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:55:41,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:55:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:55:41,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034783458] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:55:41,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:55:41,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-02-18 16:55:41,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4253987] [2022-02-18 16:55:41,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:55:41,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-18 16:55:41,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:55:41,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-18 16:55:41,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 16:55:41,746 INFO L87 Difference]: Start difference. First operand 11503 states and 39385 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:55:58,077 INFO L93 Difference]: Finished difference Result 60197 states and 198437 transitions. [2022-02-18 16:55:58,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2022-02-18 16:55:58,077 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:55:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:55:58,240 INFO L225 Difference]: With dead ends: 60197 [2022-02-18 16:55:58,240 INFO L226 Difference]: Without dead ends: 59437 [2022-02-18 16:55:58,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36617 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=13366, Invalid=77536, Unknown=0, NotChecked=0, Total=90902 [2022-02-18 16:55:58,245 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2216 mSDsluCounter, 2195 mSDsCounter, 0 mSdLazyCounter, 6660 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2216 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 7263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 6660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:55:58,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2216 Valid, 610 Invalid, 7263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 6660 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-18 16:55:58,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59437 states. [2022-02-18 16:55:58,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59437 to 12041. [2022-02-18 16:55:58,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12041 states, 12040 states have (on average 3.4166112956810633) internal successors, (41136), 12040 states have internal predecessors, (41136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12041 states to 12041 states and 41136 transitions. [2022-02-18 16:55:58,875 INFO L78 Accepts]: Start accepts. Automaton has 12041 states and 41136 transitions. Word has length 44 [2022-02-18 16:55:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:55:58,875 INFO L470 AbstractCegarLoop]: Abstraction has 12041 states and 41136 transitions. [2022-02-18 16:55:58,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:55:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 12041 states and 41136 transitions. [2022-02-18 16:55:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:55:58,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:55:58,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:55:58,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-18 16:55:59,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:55:59,095 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:55:59,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:55:59,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1074071849, now seen corresponding path program 15 times [2022-02-18 16:55:59,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:55:59,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037068967] [2022-02-18 16:55:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:55:59,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:55:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:55:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:55:59,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:55:59,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037068967] [2022-02-18 16:55:59,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037068967] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:55:59,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596860143] [2022-02-18 16:55:59,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:55:59,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:55:59,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:55:59,382 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:55:59,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-18 16:55:59,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-18 16:55:59,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:55:59,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-18 16:55:59,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:55:59,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 16:55:59,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 16:55:59,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:55:59,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-02-18 16:56:00,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 16:56:00,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 16:56:00,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:56:00,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-18 16:56:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:56:00,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:56:00,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:56:00,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:56:00,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:56:00,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:56:00,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 48 [2022-02-18 16:56:00,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:56:00,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:56:00,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:56:00,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 54 [2022-02-18 16:56:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:56:01,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596860143] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:56:01,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:56:01,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 50 [2022-02-18 16:56:01,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300223167] [2022-02-18 16:56:01,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:56:01,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-18 16:56:01,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:56:01,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-18 16:56:01,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2106, Unknown=0, NotChecked=0, Total=2450 [2022-02-18 16:56:01,147 INFO L87 Difference]: Start difference. First operand 12041 states and 41136 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:56:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:56:09,046 INFO L93 Difference]: Finished difference Result 34676 states and 117325 transitions. [2022-02-18 16:56:09,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-02-18 16:56:09,046 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:56:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:56:09,141 INFO L225 Difference]: With dead ends: 34676 [2022-02-18 16:56:09,141 INFO L226 Difference]: Without dead ends: 34676 [2022-02-18 16:56:09,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15220 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4899, Invalid=36921, Unknown=0, NotChecked=0, Total=41820 [2022-02-18 16:56:09,143 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1262 mSDsluCounter, 4153 mSDsCounter, 0 mSdLazyCounter, 2958 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 2554 SdHoareTripleChecker+Invalid, 7942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 2958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4768 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:56:09,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1262 Valid, 2554 Invalid, 7942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 2958 Invalid, 0 Unknown, 4768 Unchecked, 1.3s Time] [2022-02-18 16:56:09,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34676 states. [2022-02-18 16:56:09,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34676 to 14680. [2022-02-18 16:56:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14680 states, 14679 states have (on average 3.4467606785203353) internal successors, (50595), 14679 states have internal predecessors, (50595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:56:09,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14680 states to 14680 states and 50595 transitions. [2022-02-18 16:56:09,544 INFO L78 Accepts]: Start accepts. Automaton has 14680 states and 50595 transitions. Word has length 44 [2022-02-18 16:56:09,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:56:09,544 INFO L470 AbstractCegarLoop]: Abstraction has 14680 states and 50595 transitions. [2022-02-18 16:56:09,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:56:09,545 INFO L276 IsEmpty]: Start isEmpty. Operand 14680 states and 50595 transitions. [2022-02-18 16:56:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:56:09,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:56:09,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:56:09,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-18 16:56:09,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:56:09,788 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:56:09,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:56:09,788 INFO L85 PathProgramCache]: Analyzing trace with hash -698103635, now seen corresponding path program 16 times [2022-02-18 16:56:09,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:56:09,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005731417] [2022-02-18 16:56:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:56:09,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:56:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:56:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:56:10,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:56:10,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005731417] [2022-02-18 16:56:10,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005731417] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:56:10,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401883200] [2022-02-18 16:56:10,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:56:10,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:56:10,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:56:10,082 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:56:10,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-18 16:56:10,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:56:10,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:56:10,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:56:10,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:56:10,513 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:56:10,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 16:56:10,592 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:56:10,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:56:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:56:10,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:56:10,817 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:56:10,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:56:11,240 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:56:11,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:56:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:56:11,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401883200] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:56:11,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:56:11,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-02-18 16:56:11,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092504990] [2022-02-18 16:56:11,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:56:11,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-18 16:56:11,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:56:11,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-18 16:56:11,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2089, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 16:56:11,519 INFO L87 Difference]: Start difference. First operand 14680 states and 50595 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:56:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:56:19,271 INFO L93 Difference]: Finished difference Result 45385 states and 149970 transitions. [2022-02-18 16:56:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-18 16:56:19,272 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:56:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:56:19,382 INFO L225 Difference]: With dead ends: 45385 [2022-02-18 16:56:19,382 INFO L226 Difference]: Without dead ends: 44545 [2022-02-18 16:56:19,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10087 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4546, Invalid=26254, Unknown=0, NotChecked=0, Total=30800 [2022-02-18 16:56:19,385 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1603 mSDsluCounter, 1976 mSDsCounter, 0 mSdLazyCounter, 5384 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 5747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 5384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:56:19,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1603 Valid, 606 Invalid, 5747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 5384 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-18 16:56:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44545 states. [2022-02-18 16:56:19,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44545 to 12884. [2022-02-18 16:56:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12884 states, 12883 states have (on average 3.421175192113638) internal successors, (44075), 12883 states have internal predecessors, (44075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:56:19,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12884 states to 12884 states and 44075 transitions. [2022-02-18 16:56:19,828 INFO L78 Accepts]: Start accepts. Automaton has 12884 states and 44075 transitions. Word has length 44 [2022-02-18 16:56:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:56:19,829 INFO L470 AbstractCegarLoop]: Abstraction has 12884 states and 44075 transitions. [2022-02-18 16:56:19,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:56:19,829 INFO L276 IsEmpty]: Start isEmpty. Operand 12884 states and 44075 transitions. [2022-02-18 16:56:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:56:19,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:56:19,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:56:19,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-18 16:56:20,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:56:20,048 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:56:20,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:56:20,048 INFO L85 PathProgramCache]: Analyzing trace with hash -678348743, now seen corresponding path program 17 times [2022-02-18 16:56:20,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:56:20,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665946513] [2022-02-18 16:56:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:56:20,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:56:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:56:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:56:20,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:56:20,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665946513] [2022-02-18 16:56:20,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665946513] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:56:20,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045891508] [2022-02-18 16:56:20,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:56:20,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:56:20,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:56:20,356 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:56:20,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-18 16:56:20,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-18 16:56:20,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:56:20,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:56:20,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:56:20,899 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:56:20,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 16:56:20,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:56:20,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 16:56:20,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:56:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:56:21,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:56:21,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:56:21,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:56:21,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:56:21,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-02-18 16:56:21,560 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:56:21,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:56:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:56:21,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045891508] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:56:21,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:56:21,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-02-18 16:56:21,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911257023] [2022-02-18 16:56:21,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:56:21,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-18 16:56:21,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:56:21,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-18 16:56:21,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2064, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 16:56:21,899 INFO L87 Difference]: Start difference. First operand 12884 states and 44075 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:57:11,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:57:11,288 INFO L93 Difference]: Finished difference Result 100279 states and 326889 transitions. [2022-02-18 16:57:11,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 656 states. [2022-02-18 16:57:11,289 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:57:11,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:57:11,566 INFO L225 Difference]: With dead ends: 100279 [2022-02-18 16:57:11,567 INFO L226 Difference]: Without dead ends: 90653 [2022-02-18 16:57:11,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 699 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232505 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=56819, Invalid=433881, Unknown=0, NotChecked=0, Total=490700 [2022-02-18 16:57:11,671 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 2896 mSDsluCounter, 4381 mSDsCounter, 0 mSdLazyCounter, 9593 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2896 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 11798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 9593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1208 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:57:11,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2896 Valid, 2016 Invalid, 11798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 9593 Invalid, 0 Unknown, 1208 Unchecked, 4.8s Time] [2022-02-18 16:57:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90653 states. [2022-02-18 16:57:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90653 to 15895. [2022-02-18 16:57:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15895 states, 15894 states have (on average 3.4251289794891155) internal successors, (54439), 15894 states have internal predecessors, (54439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:57:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15895 states to 15895 states and 54439 transitions. [2022-02-18 16:57:12,596 INFO L78 Accepts]: Start accepts. Automaton has 15895 states and 54439 transitions. Word has length 44 [2022-02-18 16:57:12,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:57:12,597 INFO L470 AbstractCegarLoop]: Abstraction has 15895 states and 54439 transitions. [2022-02-18 16:57:12,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:57:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 15895 states and 54439 transitions. [2022-02-18 16:57:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:57:12,621 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:57:12,621 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:57:12,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-18 16:57:12,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:57:12,824 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:57:12,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:57:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash -77114961, now seen corresponding path program 18 times [2022-02-18 16:57:12,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:57:12,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540683598] [2022-02-18 16:57:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:57:12,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:57:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:57:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:57:13,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:57:13,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540683598] [2022-02-18 16:57:13,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540683598] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:57:13,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263738822] [2022-02-18 16:57:13,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:57:13,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:57:13,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:57:13,136 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:57:13,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-18 16:57:13,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-18 16:57:13,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:57:13,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:57:13,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:57:13,633 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:57:13,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 16:57:13,786 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:57:13,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:57:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:57:13,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:57:14,079 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:57:14,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:57:14,283 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:57:14,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:57:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:57:14,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263738822] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:57:14,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:57:14,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-02-18 16:57:14,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668213775] [2022-02-18 16:57:14,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:57:14,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-18 16:57:14,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:57:14,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-18 16:57:14,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1975, Unknown=0, NotChecked=0, Total=2256 [2022-02-18 16:57:14,566 INFO L87 Difference]: Start difference. First operand 15895 states and 54439 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:57:53,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:57:53,974 INFO L93 Difference]: Finished difference Result 78559 states and 258414 transitions. [2022-02-18 16:57:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 592 states. [2022-02-18 16:57:53,974 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:57:53,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:57:54,295 INFO L225 Difference]: With dead ends: 78559 [2022-02-18 16:57:54,295 INFO L226 Difference]: Without dead ends: 77205 [2022-02-18 16:57:54,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 634 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183905 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=40385, Invalid=363475, Unknown=0, NotChecked=0, Total=403860 [2022-02-18 16:57:54,393 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1924 mSDsluCounter, 3774 mSDsCounter, 0 mSdLazyCounter, 9893 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1924 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 10576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 9893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:57:54,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1924 Valid, 1468 Invalid, 10576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 9893 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-02-18 16:57:54,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77205 states. [2022-02-18 16:57:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77205 to 16001. [2022-02-18 16:57:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16001 states, 16000 states have (on average 3.43) internal successors, (54880), 16000 states have internal predecessors, (54880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:57:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16001 states to 16001 states and 54880 transitions. [2022-02-18 16:57:55,165 INFO L78 Accepts]: Start accepts. Automaton has 16001 states and 54880 transitions. Word has length 44 [2022-02-18 16:57:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:57:55,166 INFO L470 AbstractCegarLoop]: Abstraction has 16001 states and 54880 transitions. [2022-02-18 16:57:55,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:57:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 16001 states and 54880 transitions. [2022-02-18 16:57:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:57:55,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:57:55,191 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:57:55,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-18 16:57:55,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:57:55,393 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:57:55,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:57:55,393 INFO L85 PathProgramCache]: Analyzing trace with hash 860665313, now seen corresponding path program 19 times [2022-02-18 16:57:55,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:57:55,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282091545] [2022-02-18 16:57:55,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:57:55,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:57:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:57:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:57:55,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:57:55,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282091545] [2022-02-18 16:57:55,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282091545] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:57:55,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436892951] [2022-02-18 16:57:55,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:57:55,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:57:55,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:57:55,710 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:57:55,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-18 16:57:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:57:55,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:57:55,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:57:56,308 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:57:56,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 16:57:56,413 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:57:56,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:57:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:57:56,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:57:56,730 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:57:56,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:57:56,954 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:57:56,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:57:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:57:57,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436892951] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:57:57,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:57:57,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-02-18 16:57:57,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94016927] [2022-02-18 16:57:57,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:57:57,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-18 16:57:57,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:57:57,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-18 16:57:57,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 16:57:57,257 INFO L87 Difference]: Start difference. First operand 16001 states and 54880 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:58:37,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:58:37,005 INFO L93 Difference]: Finished difference Result 80996 states and 264692 transitions. [2022-02-18 16:58:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 570 states. [2022-02-18 16:58:37,006 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:58:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:58:37,238 INFO L225 Difference]: With dead ends: 80996 [2022-02-18 16:58:37,238 INFO L226 Difference]: Without dead ends: 79005 [2022-02-18 16:58:37,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173054 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=39432, Invalid=338178, Unknown=0, NotChecked=0, Total=377610 [2022-02-18 16:58:37,252 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 2315 mSDsluCounter, 3729 mSDsCounter, 0 mSdLazyCounter, 9990 mSolverCounterSat, 760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2315 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 10750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 760 IncrementalHoareTripleChecker+Valid, 9990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:58:37,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2315 Valid, 1395 Invalid, 10750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [760 Valid, 9990 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-02-18 16:58:37,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79005 states. [2022-02-18 16:58:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79005 to 15733. [2022-02-18 16:58:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15733 states, 15732 states have (on average 3.4367531146707346) internal successors, (54067), 15732 states have internal predecessors, (54067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:58:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15733 states to 15733 states and 54067 transitions. [2022-02-18 16:58:38,409 INFO L78 Accepts]: Start accepts. Automaton has 15733 states and 54067 transitions. Word has length 44 [2022-02-18 16:58:38,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:58:38,409 INFO L470 AbstractCegarLoop]: Abstraction has 15733 states and 54067 transitions. [2022-02-18 16:58:38,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:58:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 15733 states and 54067 transitions. [2022-02-18 16:58:38,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:58:38,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:58:38,431 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:58:38,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-18 16:58:38,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:58:38,632 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:58:38,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:58:38,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1391795877, now seen corresponding path program 20 times [2022-02-18 16:58:38,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:58:38,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445009287] [2022-02-18 16:58:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:58:38,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:58:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:58:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:58:38,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:58:38,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445009287] [2022-02-18 16:58:38,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445009287] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:58:38,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120929207] [2022-02-18 16:58:38,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:58:38,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:58:38,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:58:38,911 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:58:38,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-18 16:58:38,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:58:38,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:58:38,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:58:38,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:58:39,303 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:58:39,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 16:58:39,436 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:58:39,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:58:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:58:39,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:58:39,695 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:58:39,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:58:39,908 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:58:39,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:58:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:58:40,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120929207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:58:40,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:58:40,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2022-02-18 16:58:40,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261393289] [2022-02-18 16:58:40,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:58:40,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-18 16:58:40,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:58:40,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-18 16:58:40,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 16:58:40,198 INFO L87 Difference]: Start difference. First operand 15733 states and 54067 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:59:01,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:59:01,283 INFO L93 Difference]: Finished difference Result 63955 states and 209608 transitions. [2022-02-18 16:59:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 357 states. [2022-02-18 16:59:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:59:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:59:01,660 INFO L225 Difference]: With dead ends: 63955 [2022-02-18 16:59:01,660 INFO L226 Difference]: Without dead ends: 63155 [2022-02-18 16:59:01,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69376 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=19259, Invalid=140341, Unknown=0, NotChecked=0, Total=159600 [2022-02-18 16:59:01,670 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1995 mSDsluCounter, 2403 mSDsCounter, 0 mSdLazyCounter, 6981 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1995 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 7659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 6981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:59:01,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1995 Valid, 779 Invalid, 7659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 6981 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-18 16:59:01,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63155 states. [2022-02-18 16:59:02,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63155 to 16979. [2022-02-18 16:59:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16979 states, 16978 states have (on average 3.4392743550477087) internal successors, (58392), 16978 states have internal predecessors, (58392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:59:02,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16979 states to 16979 states and 58392 transitions. [2022-02-18 16:59:02,469 INFO L78 Accepts]: Start accepts. Automaton has 16979 states and 58392 transitions. Word has length 44 [2022-02-18 16:59:02,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:59:02,469 INFO L470 AbstractCegarLoop]: Abstraction has 16979 states and 58392 transitions. [2022-02-18 16:59:02,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:59:02,469 INFO L276 IsEmpty]: Start isEmpty. Operand 16979 states and 58392 transitions. [2022-02-18 16:59:02,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:59:02,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:59:02,496 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:59:02,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-02-18 16:59:02,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-18 16:59:02,697 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:59:02,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:59:02,697 INFO L85 PathProgramCache]: Analyzing trace with hash 884472071, now seen corresponding path program 21 times [2022-02-18 16:59:02,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:59:02,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388837370] [2022-02-18 16:59:02,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:59:02,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:59:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:59:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:59:02,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:59:02,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388837370] [2022-02-18 16:59:02,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388837370] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:59:02,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652206038] [2022-02-18 16:59:02,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:59:02,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:59:02,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:59:03,000 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:59:03,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-18 16:59:03,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-18 16:59:03,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:59:03,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-18 16:59:03,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:59:03,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:59:03,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 16:59:03,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-18 16:59:03,577 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:59:03,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:59:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:59:03,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:59:03,863 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:59:03,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:59:04,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:59:04,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:59:04,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:59:04,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-02-18 16:59:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:59:04,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652206038] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:59:04,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:59:04,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-02-18 16:59:04,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154176219] [2022-02-18 16:59:04,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:59:04,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-18 16:59:04,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:59:04,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-18 16:59:04,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2022-02-18 16:59:04,539 INFO L87 Difference]: Start difference. First operand 16979 states and 58392 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:59:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:59:44,935 INFO L93 Difference]: Finished difference Result 102003 states and 332162 transitions. [2022-02-18 16:59:44,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 580 states. [2022-02-18 16:59:44,935 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 16:59:44,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:59:45,504 INFO L225 Difference]: With dead ends: 102003 [2022-02-18 16:59:45,504 INFO L226 Difference]: Without dead ends: 100211 [2022-02-18 16:59:45,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 622 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180537 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=45817, Invalid=342935, Unknown=0, NotChecked=0, Total=388752 [2022-02-18 16:59:45,521 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 2287 mSDsluCounter, 3956 mSDsCounter, 0 mSdLazyCounter, 9383 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2287 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 11552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 9383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1418 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:59:45,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2287 Valid, 1439 Invalid, 11552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 9383 Invalid, 0 Unknown, 1418 Unchecked, 4.5s Time] [2022-02-18 16:59:45,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100211 states. [2022-02-18 16:59:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100211 to 17668. [2022-02-18 16:59:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17668 states, 17667 states have (on average 3.4446142525612724) internal successors, (60856), 17667 states have internal predecessors, (60856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:59:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17668 states to 17668 states and 60856 transitions. [2022-02-18 16:59:46,741 INFO L78 Accepts]: Start accepts. Automaton has 17668 states and 60856 transitions. Word has length 44 [2022-02-18 16:59:46,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:59:46,741 INFO L470 AbstractCegarLoop]: Abstraction has 17668 states and 60856 transitions. [2022-02-18 16:59:46,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:59:46,751 INFO L276 IsEmpty]: Start isEmpty. Operand 17668 states and 60856 transitions. [2022-02-18 16:59:46,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 16:59:46,782 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:59:46,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:59:46,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-02-18 16:59:46,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-18 16:59:46,999 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 16:59:46,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:59:46,999 INFO L85 PathProgramCache]: Analyzing trace with hash -33606939, now seen corresponding path program 22 times [2022-02-18 16:59:46,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:59:46,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577874254] [2022-02-18 16:59:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:59:47,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:59:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:59:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:59:47,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:59:47,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577874254] [2022-02-18 16:59:47,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577874254] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:59:47,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462188793] [2022-02-18 16:59:47,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:59:47,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:59:47,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:59:47,444 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 16:59:47,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-18 16:59:47,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:59:47,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:59:47,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:59:47,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:59:47,875 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:59:47,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-02-18 16:59:48,037 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 16:59:48,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 16:59:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:59:48,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:59:48,353 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:59:48,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:59:48,580 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 16:59:48,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 16:59:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:59:48,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462188793] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:59:48,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:59:48,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-02-18 16:59:48,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122189863] [2022-02-18 16:59:48,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:59:48,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-18 16:59:48,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:59:48,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-18 16:59:48,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2082, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 16:59:48,846 INFO L87 Difference]: Start difference. First operand 17668 states and 60856 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:00:27,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:00:27,890 INFO L93 Difference]: Finished difference Result 109389 states and 358634 transitions. [2022-02-18 17:00:27,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 563 states. [2022-02-18 17:00:27,891 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 17:00:27,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:00:28,656 INFO L225 Difference]: With dead ends: 109389 [2022-02-18 17:00:28,657 INFO L226 Difference]: Without dead ends: 106874 [2022-02-18 17:00:28,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 606 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169281 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=39171, Invalid=329885, Unknown=0, NotChecked=0, Total=369056 [2022-02-18 17:00:28,689 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 2699 mSDsluCounter, 2753 mSDsCounter, 0 mSdLazyCounter, 8512 mSolverCounterSat, 992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2699 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 9504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 992 IncrementalHoareTripleChecker+Valid, 8512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-18 17:00:28,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2699 Valid, 866 Invalid, 9504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [992 Valid, 8512 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-18 17:00:28,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106874 states. [2022-02-18 17:00:29,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106874 to 18383. [2022-02-18 17:00:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18383 states, 18382 states have (on average 3.444837340876945) internal successors, (63323), 18382 states have internal predecessors, (63323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:00:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18383 states to 18383 states and 63323 transitions. [2022-02-18 17:00:29,827 INFO L78 Accepts]: Start accepts. Automaton has 18383 states and 63323 transitions. Word has length 44 [2022-02-18 17:00:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:00:29,827 INFO L470 AbstractCegarLoop]: Abstraction has 18383 states and 63323 transitions. [2022-02-18 17:00:29,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:00:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 18383 states and 63323 transitions. [2022-02-18 17:00:29,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 17:00:29,858 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:00:29,858 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:00:29,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-02-18 17:00:30,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-18 17:00:30,058 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 17:00:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:00:30,059 INFO L85 PathProgramCache]: Analyzing trace with hash 272930747, now seen corresponding path program 23 times [2022-02-18 17:00:30,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:00:30,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402620130] [2022-02-18 17:00:30,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:00:30,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:00:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:00:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:00:30,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:00:30,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402620130] [2022-02-18 17:00:30,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402620130] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:00:30,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062840854] [2022-02-18 17:00:30,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:00:30,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:00:30,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:00:30,357 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:00:30,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-18 17:00:30,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-18 17:00:30,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:00:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-18 17:00:30,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:00:30,803 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 17:00:30,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 17:00:30,927 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 17:00:30,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-02-18 17:00:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:00:31,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:00:31,224 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:00:31,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 17:00:31,463 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:00:31,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 17:00:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:00:31,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062840854] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:00:31,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:00:31,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-02-18 17:00:31,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260552985] [2022-02-18 17:00:31,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:00:31,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-18 17:00:31,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:00:31,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-18 17:00:31,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1982, Unknown=0, NotChecked=0, Total=2256 [2022-02-18 17:00:31,675 INFO L87 Difference]: Start difference. First operand 18383 states and 63323 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:00:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:00:52,955 INFO L93 Difference]: Finished difference Result 84029 states and 275540 transitions. [2022-02-18 17:00:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 353 states. [2022-02-18 17:00:52,955 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 17:00:52,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:00:53,439 INFO L225 Difference]: With dead ends: 84029 [2022-02-18 17:00:53,440 INFO L226 Difference]: Without dead ends: 82831 [2022-02-18 17:00:53,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68230 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=18314, Invalid=138898, Unknown=0, NotChecked=0, Total=157212 [2022-02-18 17:00:53,447 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 1698 mSDsluCounter, 2076 mSDsCounter, 0 mSdLazyCounter, 6059 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1698 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 6689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 6059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-18 17:00:53,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1698 Valid, 726 Invalid, 6689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 6059 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-18 17:00:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82831 states. [2022-02-18 17:00:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82831 to 18613. [2022-02-18 17:00:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18613 states, 18612 states have (on average 3.445733935095637) internal successors, (64132), 18612 states have internal predecessors, (64132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:00:54,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18613 states to 18613 states and 64132 transitions. [2022-02-18 17:00:54,414 INFO L78 Accepts]: Start accepts. Automaton has 18613 states and 64132 transitions. Word has length 44 [2022-02-18 17:00:54,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:00:54,414 INFO L470 AbstractCegarLoop]: Abstraction has 18613 states and 64132 transitions. [2022-02-18 17:00:54,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:00:54,414 INFO L276 IsEmpty]: Start isEmpty. Operand 18613 states and 64132 transitions. [2022-02-18 17:00:54,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 17:00:54,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:00:54,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:00:54,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-18 17:00:54,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:00:54,646 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 17:00:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:00:54,646 INFO L85 PathProgramCache]: Analyzing trace with hash -645148263, now seen corresponding path program 24 times [2022-02-18 17:00:54,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:00:54,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204521899] [2022-02-18 17:00:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:00:54,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:00:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:00:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:00:54,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:00:54,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204521899] [2022-02-18 17:00:54,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204521899] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:00:54,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851439119] [2022-02-18 17:00:54,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:00:55,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:00:55,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:00:55,001 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:00:55,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-18 17:00:55,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-18 17:00:55,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:00:55,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 17:00:55,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:00:55,438 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 17:00:55,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 17:00:55,553 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 17:00:55,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 17:00:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:00:55,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:00:55,872 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:00:55,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 17:00:56,114 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:00:56,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 17:00:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:00:56,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851439119] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:00:56,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:00:56,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-02-18 17:00:56,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175088856] [2022-02-18 17:00:56,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:00:56,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-18 17:00:56,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:00:56,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-18 17:00:56,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2083, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 17:00:56,381 INFO L87 Difference]: Start difference. First operand 18613 states and 64132 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:01:30,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:01:30,798 INFO L93 Difference]: Finished difference Result 103092 states and 337501 transitions. [2022-02-18 17:01:30,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 489 states. [2022-02-18 17:01:30,799 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 17:01:30,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:01:31,302 INFO L225 Difference]: With dead ends: 103092 [2022-02-18 17:01:31,302 INFO L226 Difference]: Without dead ends: 101564 [2022-02-18 17:01:31,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 532 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127959 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=31003, Invalid=253619, Unknown=0, NotChecked=0, Total=284622 [2022-02-18 17:01:31,312 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2352 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 8721 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2352 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 9515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 8721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:01:31,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2352 Valid, 841 Invalid, 9515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 8721 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-02-18 17:01:31,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101564 states. [2022-02-18 17:01:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101564 to 18510. [2022-02-18 17:01:32,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18510 states, 18509 states have (on average 3.4462693824625856) internal successors, (63787), 18509 states have internal predecessors, (63787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:01:32,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18510 states to 18510 states and 63787 transitions. [2022-02-18 17:01:32,471 INFO L78 Accepts]: Start accepts. Automaton has 18510 states and 63787 transitions. Word has length 44 [2022-02-18 17:01:32,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:01:32,472 INFO L470 AbstractCegarLoop]: Abstraction has 18510 states and 63787 transitions. [2022-02-18 17:01:32,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:01:32,472 INFO L276 IsEmpty]: Start isEmpty. Operand 18510 states and 63787 transitions. [2022-02-18 17:01:32,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 17:01:32,501 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:01:32,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:01:32,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-18 17:01:32,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-18 17:01:32,702 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 17:01:32,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:01:32,702 INFO L85 PathProgramCache]: Analyzing trace with hash 21285545, now seen corresponding path program 25 times [2022-02-18 17:01:32,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:01:32,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508692001] [2022-02-18 17:01:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:01:32,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:01:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:01:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:01:33,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:01:33,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508692001] [2022-02-18 17:01:33,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508692001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:01:33,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426133361] [2022-02-18 17:01:33,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:01:33,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:01:33,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:01:33,015 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:01:33,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-18 17:01:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:01:33,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 17:01:33,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:01:33,506 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 17:01:33,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-02-18 17:01:33,592 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 17:01:33,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 17:01:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:01:33,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:01:33,899 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:01:33,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 17:01:34,145 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:01:34,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 17:01:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:01:34,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426133361] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:01:34,459 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:01:34,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-02-18 17:01:34,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915602561] [2022-02-18 17:01:34,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:01:34,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-18 17:01:34,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:01:34,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-18 17:01:34,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 17:01:34,461 INFO L87 Difference]: Start difference. First operand 18510 states and 63787 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:02:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:02:03,760 INFO L93 Difference]: Finished difference Result 91296 states and 298389 transitions. [2022-02-18 17:02:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 425 states. [2022-02-18 17:02:03,761 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 17:02:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:02:04,245 INFO L225 Difference]: With dead ends: 91296 [2022-02-18 17:02:04,245 INFO L226 Difference]: Without dead ends: 89183 [2022-02-18 17:02:04,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 468 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98758 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=25938, Invalid=194492, Unknown=0, NotChecked=0, Total=220430 [2022-02-18 17:02:04,253 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 2540 mSDsluCounter, 2733 mSDsCounter, 0 mSdLazyCounter, 8443 mSolverCounterSat, 799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2540 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 9242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 799 IncrementalHoareTripleChecker+Valid, 8443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:02:04,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2540 Valid, 852 Invalid, 9242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [799 Valid, 8443 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-02-18 17:02:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89183 states. [2022-02-18 17:02:05,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89183 to 17991. [2022-02-18 17:02:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17991 states, 17990 states have (on average 3.4312951639799887) internal successors, (61729), 17990 states have internal predecessors, (61729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:02:05,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17991 states to 17991 states and 61729 transitions. [2022-02-18 17:02:05,270 INFO L78 Accepts]: Start accepts. Automaton has 17991 states and 61729 transitions. Word has length 44 [2022-02-18 17:02:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:02:05,271 INFO L470 AbstractCegarLoop]: Abstraction has 17991 states and 61729 transitions. [2022-02-18 17:02:05,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:02:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 17991 states and 61729 transitions. [2022-02-18 17:02:05,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 17:02:05,300 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:02:05,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:02:05,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-18 17:02:05,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-18 17:02:05,503 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 17:02:05,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:02:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash -550844311, now seen corresponding path program 26 times [2022-02-18 17:02:05,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:02:05,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700217624] [2022-02-18 17:02:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:02:05,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:02:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:02:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:02:05,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:02:05,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700217624] [2022-02-18 17:02:05,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700217624] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:02:05,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527989442] [2022-02-18 17:02:05,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:02:05,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:02:05,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:02:05,804 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:02:05,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-18 17:02:05,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:02:05,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:02:05,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-18 17:02:05,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:02:06,197 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-18 17:02:06,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2022-02-18 17:02:06,351 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 17:02:06,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 17:02:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:02:06,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:02:06,530 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:02:06,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 17:02:06,826 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:02:06,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-02-18 17:02:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:02:07,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527989442] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:02:07,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:02:07,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2022-02-18 17:02:07,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021911418] [2022-02-18 17:02:07,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:02:07,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-18 17:02:07,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:02:07,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-18 17:02:07,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 17:02:07,114 INFO L87 Difference]: Start difference. First operand 17991 states and 61729 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:02:18,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:02:18,281 INFO L93 Difference]: Finished difference Result 45577 states and 151235 transitions. [2022-02-18 17:02:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-02-18 17:02:18,285 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-18 17:02:18,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:02:18,412 INFO L225 Difference]: With dead ends: 45577 [2022-02-18 17:02:18,412 INFO L226 Difference]: Without dead ends: 44903 [2022-02-18 17:02:18,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18819 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=7135, Invalid=44167, Unknown=0, NotChecked=0, Total=51302 [2022-02-18 17:02:18,416 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1300 mSDsluCounter, 2282 mSDsCounter, 0 mSdLazyCounter, 6527 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 6916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 6527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-18 17:02:18,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1300 Valid, 713 Invalid, 6916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 6527 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-18 17:02:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44903 states. [2022-02-18 17:02:18,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44903 to 17776. [2022-02-18 17:02:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17776 states, 17775 states have (on average 3.437974683544304) internal successors, (61110), 17775 states have internal predecessors, (61110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:02:19,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17776 states to 17776 states and 61110 transitions. [2022-02-18 17:02:19,009 INFO L78 Accepts]: Start accepts. Automaton has 17776 states and 61110 transitions. Word has length 44 [2022-02-18 17:02:19,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:02:19,009 INFO L470 AbstractCegarLoop]: Abstraction has 17776 states and 61110 transitions. [2022-02-18 17:02:19,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:02:19,010 INFO L276 IsEmpty]: Start isEmpty. Operand 17776 states and 61110 transitions. [2022-02-18 17:02:19,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-18 17:02:19,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:02:19,040 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:02:19,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-18 17:02:19,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:02:19,240 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-18 17:02:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:02:19,241 INFO L85 PathProgramCache]: Analyzing trace with hash -979534053, now seen corresponding path program 27 times [2022-02-18 17:02:19,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:02:19,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207702734] [2022-02-18 17:02:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:02:19,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:02:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:02:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 17:02:19,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:02:19,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207702734] [2022-02-18 17:02:19,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207702734] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:02:19,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537139149] [2022-02-18 17:02:19,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:02:19,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:02:19,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:02:19,576 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:02:19,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-18 17:02:19,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 17:02:19,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:02:19,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-18 17:02:19,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:02:20,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:02:20,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:02:20,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-02-18 17:02:20,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:02:20,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:02:20,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:02:20,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-18 17:02:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:02:20,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:02:20,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:02:20,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:02:20,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:02:20,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-02-18 17:02:20,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:02:20,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:02:20,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:02:20,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:02:20,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 48 [2022-02-18 17:02:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:02:21,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537139149] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:02:21,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:02:21,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2022-02-18 17:02:21,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198045070] [2022-02-18 17:02:21,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:02:21,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-18 17:02:21,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:02:21,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-18 17:02:21,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=2011, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 17:02:21,300 INFO L87 Difference]: Start difference. First operand 17776 states and 61110 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-02-18 17:03:03,790 WARN L244 SmtUtils]: Removed 6 from assertion stack [2022-02-18 17:03:03,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 540 states. [2022-02-18 17:03:03,840 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-18 17:03:03,840 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-18 17:03:03,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 122 SyntacticMatches, 7 SemanticMatches, 583 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163660 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=48730, Invalid=292910, Unknown=0, NotChecked=0, Total=341640 [2022-02-18 17:03:03,844 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 3472 mSDsluCounter, 3551 mSDsCounter, 0 mSdLazyCounter, 7685 mSolverCounterSat, 1255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3472 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 12047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1255 IncrementalHoareTripleChecker+Valid, 7685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3107 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:03:03,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3472 Valid, 1360 Invalid, 12047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1255 Valid, 7685 Invalid, 0 Unknown, 3107 Unchecked, 4.1s Time] [2022-02-18 17:03:03,845 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2022-02-18 17:03:03,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-18 17:03:04,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:03:04,052 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (17776states) and FLOYD_HOARE automaton (currently 540 states, 49 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 58 for 28ms.. [2022-02-18 17:03:04,053 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 5 remaining) [2022-02-18 17:03:04,053 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (2 of 5 remaining) [2022-02-18 17:03:04,053 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (1 of 5 remaining) [2022-02-18 17:03:04,054 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION (0 of 5 remaining) [2022-02-18 17:03:04,056 INFO L732 BasicCegarLoop]: Path program histogram: [27, 2, 1, 1] [2022-02-18 17:03:04,057 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-18 17:03:04,057 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-18 17:03:04,059 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 05:03:04 BasicIcfg [2022-02-18 17:03:04,059 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-18 17:03:04,059 INFO L158 Benchmark]: Toolchain (without parser) took 727590.74ms. Allocated memory was 201.3MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 160.8MB in the beginning and 1.5GB in the end (delta: -1.3GB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. [2022-02-18 17:03:04,059 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 201.3MB. Free memory is still 162.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-18 17:03:04,059 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.56ms. Allocated memory is still 201.3MB. Free memory was 160.8MB in the beginning and 159.2MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-02-18 17:03:04,059 INFO L158 Benchmark]: Boogie Preprocessor took 23.49ms. Allocated memory is still 201.3MB. Free memory was 159.2MB in the beginning and 158.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-18 17:03:04,059 INFO L158 Benchmark]: RCFGBuilder took 190.41ms. Allocated memory is still 201.3MB. Free memory was 158.2MB in the beginning and 148.3MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-18 17:03:04,059 INFO L158 Benchmark]: TraceAbstraction took 727330.87ms. Allocated memory was 201.3MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 147.8MB in the beginning and 1.5GB in the end (delta: -1.3GB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. [2022-02-18 17:03:04,060 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 201.3MB. Free memory is still 162.0MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.56ms. Allocated memory is still 201.3MB. Free memory was 160.8MB in the beginning and 159.2MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.49ms. Allocated memory is still 201.3MB. Free memory was 159.2MB in the beginning and 158.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 190.41ms. Allocated memory is still 201.3MB. Free memory was 158.2MB in the beginning and 148.3MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 727330.87ms. Allocated memory was 201.3MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 147.8MB in the beginning and 1.5GB in the end (delta: -1.3GB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (17776states) and FLOYD_HOARE automaton (currently 540 states, 49 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 58 for 28ms.. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (17776states) and FLOYD_HOARE automaton (currently 540 states, 49 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 58 for 28ms.. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (17776states) and FLOYD_HOARE automaton (currently 540 states, 49 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 58 for 28ms.. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (17776states) and FLOYD_HOARE automaton (currently 540 states, 49 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 58 for 28ms.. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (17776states) and FLOYD_HOARE automaton (currently 540 states, 49 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 58 for 28ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 61 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 727.2s, OverallIterations: 31, TraceHistogramMax: 2, PathProgramHistogramMax: 27, EmptinessCheckTime: 0.6s, AutomataDifference: 658.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 56652 SdHoareTripleChecker+Valid, 83.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 56652 mSDsluCounter, 30168 SdHoareTripleChecker+Invalid, 71.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 11707 IncrementalHoareTripleChecker+Unchecked, 73779 mSDsCounter, 18632 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 172929 IncrementalHoareTripleChecker+Invalid, 203268 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18632 mSolverCounterUnsat, 1487 mSDtfsCounter, 172929 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12480 GetRequests, 1733 SyntacticMatches, 18 SemanticMatches, 10728 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527812 ImplicationChecksByTransitivity, 556.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18613occurred in iteration=27, InterpolantAutomatonStates: 9171, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 18.0s AutomataMinimizationTime, 30 MinimizatonAttempts, 1269531 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 42.7s InterpolantComputationTime, 2442 NumberOfCodeBlocks, 2442 NumberOfCodeBlocksAsserted, 102 NumberOfCheckSat, 3449 ConstructedInterpolants, 28 QuantifiedInterpolants, 43040 SizeOfPredicates, 507 NumberOfNonLiveVariables, 3184 ConjunctsInSsa, 738 ConjunctsInUnsatCore, 83 InterpolantComputations, 6 PerfectInterpolantSequences, 277/1202 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown