/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-4b0ab11 [2022-03-01 18:01:57,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:01:57,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:01:57,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 18:01:57,518 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 18:01:57,535 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:01:57,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:01:57,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:01:57,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:01:57,536 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:01:57,536 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:01:57,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:01:57,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:01:57,537 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:01:57,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:01:57,537 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:01:57,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:01:57,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:01:57,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:01:57,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:01:57,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:01:57,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:01:57,538 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:01:57,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:01:57,538 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:01:57,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:01:57,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:01:57,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:01:57,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:01:57,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:01:57,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:01:57,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:01:57,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:01:57,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:01:57,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:01:57,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:01:57,540 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:01:57,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:01:57,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:01:57,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:01:57,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:01:57,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:01:57,773 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:01:57,776 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:01:57,777 INFO L432 ainManager$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 [2022-03-01 18:01:57,778 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl' [2022-03-01 18:01:57,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:01:57,800 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:01:57,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:01:57,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:01:57,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:01:57,813 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 01.03 06:01:57" (1/1) ... [2022-03-01 18:01:57,820 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 01.03 06:01:57" (1/1) ... [2022-03-01 18:01:57,831 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:01:57,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:01:57,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:01:57,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:01:57,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:01:57,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:57" (1/1) ... [2022-03-01 18:01:57,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:57" (1/1) ... [2022-03-01 18:01:57,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:57" (1/1) ... [2022-03-01 18:01:57,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:57" (1/1) ... [2022-03-01 18:01:57,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:57" (1/1) ... [2022-03-01 18:01:57,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:57" (1/1) ... [2022-03-01 18:01:57,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:57" (1/1) ... [2022-03-01 18:01:57,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:01:57,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:01:57,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:01:57,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:01:57,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:57" (1/1) ... [2022-03-01 18:01:57,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:01:57,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:57,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 18:01:57,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 18:01:57,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:01:57,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:01:57,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:01:57,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:01:57,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:01:57,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:01:57,924 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:01:57,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:01:57,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:01:57,924 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 18:01:57,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 18:01:57,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 18:01:57,924 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-01 18:01:57,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-01 18:01:57,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-01 18:01:57,925 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 18:01:57,971 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:01:57,973 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:01:58,096 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:01:58,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:01:58,113 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:01:58,115 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:01:58 BoogieIcfgContainer [2022-03-01 18:01:58,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:01:58,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:01:58,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:01:58,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:01:58,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:01:57" (1/2) ... [2022-03-01 18:01:58,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@531a88b0 and model type prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:01:58, skipping insertion in model container [2022-03-01 18:01:58,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:01:58" (2/2) ... [2022-03-01 18:01:58,122 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons3.wvr.bpl [2022-03-01 18:01:58,125 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:01:58,126 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:01:58,126 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:01:58,126 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:01:58,191 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-01 18:01:58,259 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:01:58,265 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 18:01:58,266 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-01 18:01:58,277 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 40 transitions, 112 flow [2022-03-01 18:01:58,391 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) [2022-03-01 18:01:58,395 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) [2022-03-01 18:01:58,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:58,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:58,419 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] [2022-03-01 18:01:58,420 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:01:58,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:58,424 INFO L85 PathProgramCache]: Analyzing trace with hash 179406345, now seen corresponding path program 1 times [2022-03-01 18:01:58,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:58,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150557472] [2022-03-01 18:01:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:58,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:58,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:58,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150557472] [2022-03-01 18:01:58,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150557472] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:01:58,550 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:01:58,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:01:58,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040148631] [2022-03-01 18:01:58,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:01:58,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:01:58,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:58,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:01:58,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:01:58,583 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) [2022-03-01 18:01:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:58,674 INFO L93 Difference]: Finished difference Result 912 states and 3051 transitions. [2022-03-01 18:01:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:01:58,676 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 [2022-03-01 18:01:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:58,692 INFO L225 Difference]: With dead ends: 912 [2022-03-01 18:01:58,692 INFO L226 Difference]: Without dead ends: 539 [2022-03-01 18:01:58,694 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 [2022-03-01 18:01:58,698 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 [2022-03-01 18:01:58,699 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] [2022-03-01 18:01:58,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-03-01 18:01:58,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2022-03-01 18:01:58,817 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) [2022-03-01 18:01:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1702 transitions. [2022-03-01 18:01:58,821 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1702 transitions. Word has length 24 [2022-03-01 18:01:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:58,822 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1702 transitions. [2022-03-01 18:01:58,822 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) [2022-03-01 18:01:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1702 transitions. [2022-03-01 18:01:58,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:58,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:58,825 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] [2022-03-01 18:01:58,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:01:58,825 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:01:58,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:58,826 INFO L85 PathProgramCache]: Analyzing trace with hash -483784061, now seen corresponding path program 2 times [2022-03-01 18:01:58,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:58,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679719610] [2022-03-01 18:01:58,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:58,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:58,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:58,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679719610] [2022-03-01 18:01:58,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679719610] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:01:58,876 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:01:58,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:01:58,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23424268] [2022-03-01 18:01:58,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:01:58,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:01:58,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:58,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:01:58,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:01:58,879 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) [2022-03-01 18:01:58,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:58,970 INFO L93 Difference]: Finished difference Result 863 states and 2726 transitions. [2022-03-01 18:01:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:01:58,971 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 [2022-03-01 18:01:58,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:58,977 INFO L225 Difference]: With dead ends: 863 [2022-03-01 18:01:58,977 INFO L226 Difference]: Without dead ends: 671 [2022-03-01 18:01:58,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:01:58,979 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 [2022-03-01 18:01:58,979 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] [2022-03-01 18:01:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-03-01 18:01:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2022-03-01 18:01:59,006 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) [2022-03-01 18:01:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2158 transitions. [2022-03-01 18:01:59,010 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2158 transitions. Word has length 24 [2022-03-01 18:01:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:59,010 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 2158 transitions. [2022-03-01 18:01:59,010 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) [2022-03-01 18:01:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2158 transitions. [2022-03-01 18:01:59,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:01:59,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:59,013 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] [2022-03-01 18:01:59,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 18:01:59,013 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:01:59,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:59,014 INFO L85 PathProgramCache]: Analyzing trace with hash 683624999, now seen corresponding path program 1 times [2022-03-01 18:01:59,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:59,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763528928] [2022-03-01 18:01:59,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:59,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:59,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:59,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763528928] [2022-03-01 18:01:59,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763528928] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:01:59,050 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:01:59,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:01:59,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22627424] [2022-03-01 18:01:59,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:01:59,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:01:59,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:59,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:01:59,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:01:59,052 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) [2022-03-01 18:01:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:59,082 INFO L93 Difference]: Finished difference Result 752 states and 2398 transitions. [2022-03-01 18:01:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:01:59,082 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 [2022-03-01 18:01:59,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:59,087 INFO L225 Difference]: With dead ends: 752 [2022-03-01 18:01:59,087 INFO L226 Difference]: Without dead ends: 752 [2022-03-01 18:01:59,088 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 [2022-03-01 18:01:59,097 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 [2022-03-01 18:01:59,098 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] [2022-03-01 18:01:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-03-01 18:01:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2022-03-01 18:01:59,127 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) [2022-03-01 18:01:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2398 transitions. [2022-03-01 18:01:59,130 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2398 transitions. Word has length 27 [2022-03-01 18:01:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:59,131 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2398 transitions. [2022-03-01 18:01:59,131 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) [2022-03-01 18:01:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2398 transitions. [2022-03-01 18:01:59,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:01:59,134 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:59,135 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] [2022-03-01 18:01:59,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 18:01:59,135 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:01:59,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:59,140 INFO L85 PathProgramCache]: Analyzing trace with hash -699174524, now seen corresponding path program 1 times [2022-03-01 18:01:59,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:59,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160514677] [2022-03-01 18:01:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:59,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:01:59,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:59,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160514677] [2022-03-01 18:01:59,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160514677] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:01:59,207 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:01:59,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:01:59,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070334419] [2022-03-01 18:01:59,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:01:59,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:01:59,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:59,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:01:59,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:01:59,209 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) [2022-03-01 18:01:59,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:59,241 INFO L93 Difference]: Finished difference Result 800 states and 2514 transitions. [2022-03-01 18:01:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:01:59,242 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 [2022-03-01 18:01:59,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:59,247 INFO L225 Difference]: With dead ends: 800 [2022-03-01 18:01:59,247 INFO L226 Difference]: Without dead ends: 774 [2022-03-01 18:01:59,248 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 [2022-03-01 18:01:59,255 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 [2022-03-01 18:01:59,256 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] [2022-03-01 18:01:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-03-01 18:01:59,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 774. [2022-03-01 18:01:59,280 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) [2022-03-01 18:01:59,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2452 transitions. [2022-03-01 18:01:59,285 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2452 transitions. Word has length 31 [2022-03-01 18:01:59,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:59,285 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 2452 transitions. [2022-03-01 18:01:59,285 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) [2022-03-01 18:01:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2452 transitions. [2022-03-01 18:01:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 18:01:59,290 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:59,290 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] [2022-03-01 18:01:59,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 18:01:59,290 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:01:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:59,292 INFO L85 PathProgramCache]: Analyzing trace with hash 555677261, now seen corresponding path program 1 times [2022-03-01 18:01:59,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:59,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971005045] [2022-03-01 18:01:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:59,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:59,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:59,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971005045] [2022-03-01 18:01:59,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971005045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:59,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40431490] [2022-03-01 18:01:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:59,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:59,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:59,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:59,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 18:01:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:59,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 18:01:59,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:00,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:02:00,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 18:02:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:00,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:00,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:00,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-01 18:02:00,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:00,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-03-01 18:02:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:00,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40431490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:00,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:00,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 18:02:00,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602055529] [2022-03-01 18:02:00,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:00,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:02:00,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:00,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:02:00,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:02:00,590 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) [2022-03-01 18:02:01,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:01,906 INFO L93 Difference]: Finished difference Result 2142 states and 6646 transitions. [2022-03-01 18:02:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:02:01,907 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 [2022-03-01 18:02:01,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:01,918 INFO L225 Difference]: With dead ends: 2142 [2022-03-01 18:02:01,918 INFO L226 Difference]: Without dead ends: 1716 [2022-03-01 18:02:01,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=586, Invalid=2384, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:02:01,920 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 517 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:01,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 330 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:02:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-03-01 18:02:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 906. [2022-03-01 18:02:01,954 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) [2022-03-01 18:02:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2908 transitions. [2022-03-01 18:02:01,966 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2908 transitions. Word has length 34 [2022-03-01 18:02:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:01,967 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2908 transitions. [2022-03-01 18:02:01,967 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) [2022-03-01 18:02:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2908 transitions. [2022-03-01 18:02:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:02:01,973 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:01,973 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] [2022-03-01 18:02:02,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:02,192 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 [2022-03-01 18:02:02,193 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:02:02,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:02,193 INFO L85 PathProgramCache]: Analyzing trace with hash 561664541, now seen corresponding path program 2 times [2022-03-01 18:02:02,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:02,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853188791] [2022-03-01 18:02:02,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:02,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:02,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:02,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853188791] [2022-03-01 18:02:02,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853188791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:02,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313133023] [2022-03-01 18:02:02,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:02:02,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:02,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:02,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:02,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 18:02:02,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:02:02,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:02,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 18:02:02,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:02:02,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-01 18:02:02,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313133023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:02:02,353 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-01 18:02:02,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-03-01 18:02:02,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522721436] [2022-03-01 18:02:02,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:02:02,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:02:02,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:02,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:02:02,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:02:02,354 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) [2022-03-01 18:02:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:02,404 INFO L93 Difference]: Finished difference Result 2380 states and 7576 transitions. [2022-03-01 18:02:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:02:02,404 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 [2022-03-01 18:02:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:02,420 INFO L225 Difference]: With dead ends: 2380 [2022-03-01 18:02:02,421 INFO L226 Difference]: Without dead ends: 2330 [2022-03-01 18:02:02,421 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 [2022-03-01 18:02:02,421 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 [2022-03-01 18:02:02,422 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] [2022-03-01 18:02:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2022-03-01 18:02:02,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1654. [2022-03-01 18:02:02,480 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) [2022-03-01 18:02:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5500 transitions. [2022-03-01 18:02:02,493 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5500 transitions. Word has length 37 [2022-03-01 18:02:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:02,493 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 5500 transitions. [2022-03-01 18:02:02,493 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) [2022-03-01 18:02:02,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5500 transitions. [2022-03-01 18:02:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 18:02:02,499 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:02,499 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] [2022-03-01 18:02:02,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:02,715 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 [2022-03-01 18:02:02,716 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:02:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1536215610, now seen corresponding path program 3 times [2022-03-01 18:02:02,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:02,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417432566] [2022-03-01 18:02:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:02,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 18:02:02,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:02,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417432566] [2022-03-01 18:02:02,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417432566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:02,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951374728] [2022-03-01 18:02:02,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:02:02,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:02,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:02,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:02,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 18:02:02,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:02:02,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:02,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 18:02:02,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:02:02,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-01 18:02:02,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951374728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:02:02,916 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-01 18:02:02,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-03-01 18:02:02,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962078613] [2022-03-01 18:02:02,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:02:02,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:02:02,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:02,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:02:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:02:02,919 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) [2022-03-01 18:02:02,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:02,975 INFO L93 Difference]: Finished difference Result 4845 states and 15851 transitions. [2022-03-01 18:02:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:02:02,976 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 [2022-03-01 18:02:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:03,007 INFO L225 Difference]: With dead ends: 4845 [2022-03-01 18:02:03,007 INFO L226 Difference]: Without dead ends: 4554 [2022-03-01 18:02:03,007 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 [2022-03-01 18:02:03,008 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 [2022-03-01 18:02:03,009 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] [2022-03-01 18:02:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2022-03-01 18:02:03,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3828. [2022-03-01 18:02:03,165 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) [2022-03-01 18:02:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 12888 transitions. [2022-03-01 18:02:03,184 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 12888 transitions. Word has length 41 [2022-03-01 18:02:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:03,185 INFO L470 AbstractCegarLoop]: Abstraction has 3828 states and 12888 transitions. [2022-03-01 18:02:03,185 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) [2022-03-01 18:02:03,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 12888 transitions. [2022-03-01 18:02:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:02:03,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:03,200 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] [2022-03-01 18:02:03,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:03,415 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 [2022-03-01 18:02:03,416 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:02:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:03,416 INFO L85 PathProgramCache]: Analyzing trace with hash 621598743, now seen corresponding path program 4 times [2022-03-01 18:02:03,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:03,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608273584] [2022-03-01 18:02:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:03,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:02:03,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:03,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608273584] [2022-03-01 18:02:03,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608273584] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:03,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457788200] [2022-03-01 18:02:03,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:02:03,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:03,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:03,884 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:03,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 18:02:03,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:02:03,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:03,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:02:03,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:04,616 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:02:04,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:02:04,748 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:02:04,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 18:02:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:04,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:05,179 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:02:05,179 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 [2022-03-01 18:02:05,479 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:02:05,479 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 [2022-03-01 18:02:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:05,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457788200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:05,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:05,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 48 [2022-03-01 18:02:05,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189672309] [2022-03-01 18:02:05,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:05,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-01 18:02:05,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:05,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-01 18:02:05,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1983, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:02:05,884 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) [2022-03-01 18:02:57,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:57,369 INFO L93 Difference]: Finished difference Result 51739 states and 168758 transitions. [2022-03-01 18:02:57,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 656 states. [2022-03-01 18:02:57,370 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 [2022-03-01 18:02:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:57,641 INFO L225 Difference]: With dead ends: 51739 [2022-03-01 18:02:57,641 INFO L226 Difference]: Without dead ends: 44084 [2022-03-01 18:02:57,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 698 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237275 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=55167, Invalid=434133, Unknown=0, NotChecked=0, Total=489300 [2022-03-01 18:02:57,696 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 4921 mSDsluCounter, 4563 mSDsCounter, 0 mSdLazyCounter, 7578 mSolverCounterSat, 1771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4921 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 9349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1771 IncrementalHoareTripleChecker+Valid, 7578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:57,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4921 Valid, 2500 Invalid, 9349 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1771 Valid, 7578 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-03-01 18:02:57,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44084 states. [2022-03-01 18:02:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44084 to 6431. [2022-03-01 18:02:58,310 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) [2022-03-01 18:02:58,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6431 states to 6431 states and 22077 transitions. [2022-03-01 18:02:58,335 INFO L78 Accepts]: Start accepts. Automaton has 6431 states and 22077 transitions. Word has length 44 [2022-03-01 18:02:58,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:58,336 INFO L470 AbstractCegarLoop]: Abstraction has 6431 states and 22077 transitions. [2022-03-01 18:02:58,342 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) [2022-03-01 18:02:58,342 INFO L276 IsEmpty]: Start isEmpty. Operand 6431 states and 22077 transitions. [2022-03-01 18:02:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:02:58,358 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:58,358 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] [2022-03-01 18:02:58,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:58,571 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 [2022-03-01 18:02:58,571 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:02:58,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:58,572 INFO L85 PathProgramCache]: Analyzing trace with hash -857814709, now seen corresponding path program 5 times [2022-03-01 18:02:58,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:58,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884818093] [2022-03-01 18:02:58,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:58,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:58,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:58,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884818093] [2022-03-01 18:02:58,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884818093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:58,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206793352] [2022-03-01 18:02:58,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:02:58,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:58,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:58,912 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:58,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 18:02:58,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:02:58,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:58,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 18:02:58,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:59,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:59,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:59,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:59,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2022-03-01 18:02:59,825 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:02:59,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 18:02:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:59,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:03:00,180 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:03:00,180 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 [2022-03-01 18:03:00,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:03:00,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:03:00,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:03:00,511 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 [2022-03-01 18:03:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:00,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206793352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:03:00,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:03:00,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2022-03-01 18:03:00,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890742073] [2022-03-01 18:03:00,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:03:00,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-01 18:03:00,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:03:00,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-01 18:03:00,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1883, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:03:00,901 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) [2022-03-01 18:03:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:03:27,777 INFO L93 Difference]: Finished difference Result 57685 states and 186519 transitions. [2022-03-01 18:03:27,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 408 states. [2022-03-01 18:03:27,777 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 [2022-03-01 18:03:27,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:03:28,196 INFO L225 Difference]: With dead ends: 57685 [2022-03-01 18:03:28,197 INFO L226 Difference]: Without dead ends: 56637 [2022-03-01 18:03:28,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 449 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93059 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=27309, Invalid=175641, Unknown=0, NotChecked=0, Total=202950 [2022-03-01 18:03:28,208 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 2145 mSDsluCounter, 3967 mSDsCounter, 0 mSdLazyCounter, 8137 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s 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, 4.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:03:28,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2145 Valid, 1803 Invalid, 9032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 8137 Invalid, 0 Unknown, 189 Unchecked, 4.3s Time] [2022-03-01 18:03:28,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56637 states. [2022-03-01 18:03:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56637 to 7979. [2022-03-01 18:03:28,889 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) [2022-03-01 18:03:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7979 states to 7979 states and 27307 transitions. [2022-03-01 18:03:28,914 INFO L78 Accepts]: Start accepts. Automaton has 7979 states and 27307 transitions. Word has length 44 [2022-03-01 18:03:28,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:03:28,914 INFO L470 AbstractCegarLoop]: Abstraction has 7979 states and 27307 transitions. [2022-03-01 18:03:28,915 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) [2022-03-01 18:03:28,915 INFO L276 IsEmpty]: Start isEmpty. Operand 7979 states and 27307 transitions. [2022-03-01 18:03:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:03:28,935 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:03:28,935 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] [2022-03-01 18:03:28,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-01 18:03:29,157 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 [2022-03-01 18:03:29,157 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:03:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:03:29,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1365138515, now seen corresponding path program 6 times [2022-03-01 18:03:29,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:03:29,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383841219] [2022-03-01 18:03:29,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:03:29,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:03:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:03:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:29,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:03:29,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383841219] [2022-03-01 18:03:29,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383841219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:03:29,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29169817] [2022-03-01 18:03:29,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:03:29,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:03:29,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:03:29,518 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:03:29,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 18:03:29,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:03:29,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:03:29,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:03:29,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:03:29,980 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:03:29,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:03:30,172 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:03:30,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 18:03:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:30,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:03:30,482 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:03:30,483 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 [2022-03-01 18:03:30,782 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:03:30,782 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 [2022-03-01 18:03:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:31,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29169817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:03:31,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:03:31,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-03-01 18:03:31,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560027783] [2022-03-01 18:03:31,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:03:31,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-01 18:03:31,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:03:31,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-01 18:03:31,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:03:31,122 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) [2022-03-01 18:04:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:04:03,798 INFO L93 Difference]: Finished difference Result 70182 states and 229734 transitions. [2022-03-01 18:04:03,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 483 states. [2022-03-01 18:04:03,798 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 [2022-03-01 18:04:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:04:04,314 INFO L225 Difference]: With dead ends: 70182 [2022-03-01 18:04:04,315 INFO L226 Difference]: Without dead ends: 68860 [2022-03-01 18:04:04,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126510 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=32128, Invalid=245074, Unknown=0, NotChecked=0, Total=277202 [2022-03-01 18:04:04,329 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 2422 mSDsluCounter, 3253 mSDsCounter, 0 mSdLazyCounter, 7200 mSolverCounterSat, 868 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s 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, 3.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:04:04,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2422 Valid, 1424 Invalid, 8068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [868 Valid, 7200 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-03-01 18:04:04,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68860 states. [2022-03-01 18:04:05,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68860 to 8486. [2022-03-01 18:04:05,059 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) [2022-03-01 18:04:05,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8486 states to 8486 states and 29051 transitions. [2022-03-01 18:04:05,091 INFO L78 Accepts]: Start accepts. Automaton has 8486 states and 29051 transitions. Word has length 44 [2022-03-01 18:04:05,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:04:05,092 INFO L470 AbstractCegarLoop]: Abstraction has 8486 states and 29051 transitions. [2022-03-01 18:04:05,092 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) [2022-03-01 18:04:05,092 INFO L276 IsEmpty]: Start isEmpty. Operand 8486 states and 29051 transitions. [2022-03-01 18:04:05,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:04:05,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:04:05,112 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] [2022-03-01 18:04:05,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 18:04:05,326 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 [2022-03-01 18:04:05,326 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:04:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:04:05,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2011749771, now seen corresponding path program 7 times [2022-03-01 18:04:05,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:04:05,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942806078] [2022-03-01 18:04:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:04:05,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:04:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:04:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:05,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:04:05,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942806078] [2022-03-01 18:04:05,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942806078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:04:05,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363395522] [2022-03-01 18:04:05,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:04:05,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:04:05,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:04:05,699 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:04:05,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 18:04:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:04:05,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:04:05,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:04:06,145 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:04:06,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:04:06,313 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:04:06,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:04:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:06,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:04:06,705 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:04:06,706 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 [2022-03-01 18:04:06,992 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:04:06,993 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 [2022-03-01 18:04:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:07,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363395522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:04:07,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:04:07,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-01 18:04:07,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000813844] [2022-03-01 18:04:07,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:04:07,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 18:04:07,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:04:07,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 18:04:07,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2092, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:04:07,395 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) [2022-03-01 18:04:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:04:46,369 INFO L93 Difference]: Finished difference Result 99443 states and 325378 transitions. [2022-03-01 18:04:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 541 states. [2022-03-01 18:04:46,370 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 [2022-03-01 18:04:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:04:46,836 INFO L225 Difference]: With dead ends: 99443 [2022-03-01 18:04:46,837 INFO L226 Difference]: Without dead ends: 96214 [2022-03-01 18:04:46,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 584 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159241 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=39564, Invalid=303246, Unknown=0, NotChecked=0, Total=342810 [2022-03-01 18:04:46,851 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 3202 mSDsluCounter, 3237 mSDsCounter, 0 mSdLazyCounter, 7149 mSolverCounterSat, 1178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s 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, 4.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:04:46,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3202 Valid, 1454 Invalid, 8327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1178 Valid, 7149 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-01 18:04:46,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96214 states. [2022-03-01 18:04:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96214 to 10781. [2022-03-01 18:04:47,953 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) [2022-03-01 18:04:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10781 states to 10781 states and 36856 transitions. [2022-03-01 18:04:47,989 INFO L78 Accepts]: Start accepts. Automaton has 10781 states and 36856 transitions. Word has length 44 [2022-03-01 18:04:47,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:04:47,989 INFO L470 AbstractCegarLoop]: Abstraction has 10781 states and 36856 transitions. [2022-03-01 18:04:47,989 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) [2022-03-01 18:04:47,989 INFO L276 IsEmpty]: Start isEmpty. Operand 10781 states and 36856 transitions. [2022-03-01 18:04:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:04:48,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:04:48,013 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] [2022-03-01 18:04:48,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-01 18:04:48,227 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 [2022-03-01 18:04:48,227 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:04:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:04:48,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1976679839, now seen corresponding path program 8 times [2022-03-01 18:04:48,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:04:48,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568676556] [2022-03-01 18:04:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:04:48,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:04:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:04:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:48,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:04:48,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568676556] [2022-03-01 18:04:48,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568676556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:04:48,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670827471] [2022-03-01 18:04:48,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:04:48,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:04:48,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:04:48,579 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:04:48,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 18:04:48,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:04:48,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:04:48,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:04:48,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:04:49,057 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:04:49,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:04:49,182 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:04:49,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:04:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:49,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:04:49,504 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:04:49,504 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 [2022-03-01 18:04:49,902 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:04:49,902 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 [2022-03-01 18:04:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:50,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670827471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:04:50,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:04:50,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-03-01 18:04:50,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658366846] [2022-03-01 18:04:50,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:04:50,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-01 18:04:50,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:04:50,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-01 18:04:50,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1999, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:04:50,215 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) [2022-03-01 18:05:13,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:05:13,894 INFO L93 Difference]: Finished difference Result 72714 states and 237510 transitions. [2022-03-01 18:05:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2022-03-01 18:05:13,894 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 [2022-03-01 18:05:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:05:14,168 INFO L225 Difference]: With dead ends: 72714 [2022-03-01 18:05:14,168 INFO L226 Difference]: Without dead ends: 71522 [2022-03-01 18:05:14,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72497 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=19555, Invalid=144875, Unknown=0, NotChecked=0, Total=164430 [2022-03-01 18:05:14,177 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 2532 mSDsluCounter, 2681 mSDsCounter, 0 mSdLazyCounter, 5890 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s 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, 3.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:05:14,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2532 Valid, 1214 Invalid, 6833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 5890 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-01 18:05:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71522 states. [2022-03-01 18:05:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71522 to 10918. [2022-03-01 18:05:15,104 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) [2022-03-01 18:05:15,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10918 states to 10918 states and 37324 transitions. [2022-03-01 18:05:15,140 INFO L78 Accepts]: Start accepts. Automaton has 10918 states and 37324 transitions. Word has length 44 [2022-03-01 18:05:15,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:05:15,140 INFO L470 AbstractCegarLoop]: Abstraction has 10918 states and 37324 transitions. [2022-03-01 18:05:15,140 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) [2022-03-01 18:05:15,140 INFO L276 IsEmpty]: Start isEmpty. Operand 10918 states and 37324 transitions. [2022-03-01 18:05:15,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:05:15,162 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:05:15,162 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] [2022-03-01 18:05:15,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 18:05:15,362 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 [2022-03-01 18:05:15,363 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:05:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:05:15,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1400208447, now seen corresponding path program 9 times [2022-03-01 18:05:15,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:05:15,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727644325] [2022-03-01 18:05:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:05:15,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:05:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:05:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:15,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:05:15,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727644325] [2022-03-01 18:05:15,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727644325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:05:15,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667967608] [2022-03-01 18:05:15,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:05:15,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:15,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:05:15,895 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:05:15,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 18:05:15,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:05:15,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:05:15,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 18:05:15,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:05:16,383 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:05:16,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:05:16,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:05:16,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:05:16,556 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 [2022-03-01 18:05:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:16,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:05:16,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:05:16,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:05:16,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:05:16,977 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 [2022-03-01 18:05:17,394 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:05:17,394 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 [2022-03-01 18:05:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:17,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667967608] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:05:17,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:05:17,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-01 18:05:17,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979845887] [2022-03-01 18:05:17,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:05:17,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 18:05:17,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:05:17,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 18:05:17,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2053, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:05:17,774 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) [2022-03-01 18:06:00,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:00,598 INFO L93 Difference]: Finished difference Result 101348 states and 328669 transitions. [2022-03-01 18:06:00,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 547 states. [2022-03-01 18:06:00,598 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 [2022-03-01 18:06:00,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:01,245 INFO L225 Difference]: With dead ends: 101348 [2022-03-01 18:06:01,246 INFO L226 Difference]: Without dead ends: 99757 [2022-03-01 18:06:01,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 590 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166472 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=44693, Invalid=305179, Unknown=0, NotChecked=0, Total=349872 [2022-03-01 18:06:01,256 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 2786 mSDsluCounter, 4485 mSDsCounter, 0 mSdLazyCounter, 7935 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s 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, 4.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:01,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2786 Valid, 2109 Invalid, 9949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 7935 Invalid, 0 Unknown, 1017 Unchecked, 4.3s Time] [2022-03-01 18:06:01,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99757 states. [2022-03-01 18:06:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99757 to 11675. [2022-03-01 18:06:02,466 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) [2022-03-01 18:06:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11675 states to 11675 states and 40049 transitions. [2022-03-01 18:06:02,499 INFO L78 Accepts]: Start accepts. Automaton has 11675 states and 40049 transitions. Word has length 44 [2022-03-01 18:06:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:02,499 INFO L470 AbstractCegarLoop]: Abstraction has 11675 states and 40049 transitions. [2022-03-01 18:06:02,499 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) [2022-03-01 18:06:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 11675 states and 40049 transitions. [2022-03-01 18:06:02,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:06:02,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:02,519 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] [2022-03-01 18:06:02,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-01 18:06:02,719 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 [2022-03-01 18:06:02,719 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:06:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:02,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2066642255, now seen corresponding path program 10 times [2022-03-01 18:06:02,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:02,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35193964] [2022-03-01 18:06:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:02,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:03,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:03,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35193964] [2022-03-01 18:06:03,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35193964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:03,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846932108] [2022-03-01 18:06:03,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:06:03,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:03,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:03,144 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:03,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 18:06:03,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:06:03,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:03,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:06:03,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:03,665 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:03,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:06:03,752 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:03,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 18:06:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:03,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:04,088 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:06:04,088 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 [2022-03-01 18:06:04,360 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:06:04,360 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 [2022-03-01 18:06:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:04,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846932108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:04,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:04,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-01 18:06:04,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513990670] [2022-03-01 18:06:04,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:04,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 18:06:04,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:04,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 18:06:04,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2089, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:06:04,721 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) [2022-03-01 18:06:32,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:32,918 INFO L93 Difference]: Finished difference Result 80755 states and 263729 transitions. [2022-03-01 18:06:32,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2022-03-01 18:06:32,918 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 [2022-03-01 18:06:32,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:33,360 INFO L225 Difference]: With dead ends: 80755 [2022-03-01 18:06:33,360 INFO L226 Difference]: Without dead ends: 78558 [2022-03-01 18:06:33,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88918 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=24364, Invalid=174998, Unknown=0, NotChecked=0, Total=199362 [2022-03-01 18:06:33,366 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 3489 mSDsluCounter, 2162 mSDsCounter, 0 mSdLazyCounter, 6434 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:33,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3489 Valid, 786 Invalid, 7534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 6434 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-01 18:06:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78558 states. [2022-03-01 18:06:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78558 to 11362. [2022-03-01 18:06:34,187 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) [2022-03-01 18:06:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11362 states to 11362 states and 38894 transitions. [2022-03-01 18:06:34,220 INFO L78 Accepts]: Start accepts. Automaton has 11362 states and 38894 transitions. Word has length 44 [2022-03-01 18:06:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:34,220 INFO L470 AbstractCegarLoop]: Abstraction has 11362 states and 38894 transitions. [2022-03-01 18:06:34,220 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) [2022-03-01 18:06:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 11362 states and 38894 transitions. [2022-03-01 18:06:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:06:34,237 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:34,238 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] [2022-03-01 18:06:34,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-01 18:06:34,438 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 [2022-03-01 18:06:34,438 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:06:34,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:34,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1494512399, now seen corresponding path program 11 times [2022-03-01 18:06:34,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:34,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920325136] [2022-03-01 18:06:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:34,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:34,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:34,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920325136] [2022-03-01 18:06:34,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920325136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:34,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367064410] [2022-03-01 18:06:34,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:06:34,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:34,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:34,812 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:34,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 18:06:34,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:06:34,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:34,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 18:06:34,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:35,253 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:35,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:06:35,410 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:35,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:06:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:35,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:35,611 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:06:35,612 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 [2022-03-01 18:06:35,922 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:06:35,922 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 [2022-03-01 18:06:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:36,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367064410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:36,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:36,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2022-03-01 18:06:36,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687684229] [2022-03-01 18:06:36,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:36,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-01 18:06:36,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:36,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-01 18:06:36,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1911, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:06:36,211 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) [2022-03-01 18:06:49,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:49,212 INFO L93 Difference]: Finished difference Result 42157 states and 138706 transitions. [2022-03-01 18:06:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-03-01 18:06:49,212 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 [2022-03-01 18:06:49,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:49,416 INFO L225 Difference]: With dead ends: 42157 [2022-03-01 18:06:49,417 INFO L226 Difference]: Without dead ends: 41447 [2022-03-01 18:06:49,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24671 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=9024, Invalid=55238, Unknown=0, NotChecked=0, Total=64262 [2022-03-01 18:06:49,420 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 [2022-03-01 18:06:49,420 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] [2022-03-01 18:06:49,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41447 states. [2022-03-01 18:06:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41447 to 11393. [2022-03-01 18:06:49,783 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) [2022-03-01 18:06:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11393 states to 11393 states and 39014 transitions. [2022-03-01 18:06:49,812 INFO L78 Accepts]: Start accepts. Automaton has 11393 states and 39014 transitions. Word has length 44 [2022-03-01 18:06:49,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:49,812 INFO L470 AbstractCegarLoop]: Abstraction has 11393 states and 39014 transitions. [2022-03-01 18:06:49,812 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) [2022-03-01 18:06:49,812 INFO L276 IsEmpty]: Start isEmpty. Operand 11393 states and 39014 transitions. [2022-03-01 18:06:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:06:49,828 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:49,829 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] [2022-03-01 18:06:49,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:50,029 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 [2022-03-01 18:06:50,029 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:06:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:50,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1850385115, now seen corresponding path program 12 times [2022-03-01 18:06:50,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:50,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962271523] [2022-03-01 18:06:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:50,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:50,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:50,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962271523] [2022-03-01 18:06:50,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962271523] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:50,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727954789] [2022-03-01 18:06:50,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:06:50,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:50,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:50,324 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:50,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 18:06:50,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:06:50,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:50,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:06:50,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:50,736 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:50,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:06:50,888 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:50,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 18:06:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:50,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:51,093 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:06:51,093 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 [2022-03-01 18:06:51,373 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:06:51,373 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 [2022-03-01 18:06:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:51,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727954789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:51,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:51,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2022-03-01 18:06:51,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100859772] [2022-03-01 18:06:51,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:51,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-01 18:06:51,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:51,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-01 18:06:51,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:06:51,689 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) [2022-03-01 18:06:56,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:56,162 INFO L93 Difference]: Finished difference Result 25242 states and 83256 transitions. [2022-03-01 18:06:56,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-01 18:06:56,163 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 [2022-03-01 18:06:56,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:56,220 INFO L225 Difference]: With dead ends: 25242 [2022-03-01 18:06:56,220 INFO L226 Difference]: Without dead ends: 24864 [2022-03-01 18:06:56,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2085, Invalid=11957, Unknown=0, NotChecked=0, Total=14042 [2022-03-01 18:06:56,222 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1110 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 3535 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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 [2022-03-01 18:06:56,223 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] [2022-03-01 18:06:56,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24864 states. [2022-03-01 18:06:56,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24864 to 11332. [2022-03-01 18:06:56,518 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) [2022-03-01 18:06:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11332 states to 11332 states and 38807 transitions. [2022-03-01 18:06:56,546 INFO L78 Accepts]: Start accepts. Automaton has 11332 states and 38807 transitions. Word has length 44 [2022-03-01 18:06:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:56,546 INFO L470 AbstractCegarLoop]: Abstraction has 11332 states and 38807 transitions. [2022-03-01 18:06:56,546 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) [2022-03-01 18:06:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 11332 states and 38807 transitions. [2022-03-01 18:06:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:06:56,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:56,563 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] [2022-03-01 18:06:56,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:56,764 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 [2022-03-01 18:06:56,764 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:06:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:56,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1937258375, now seen corresponding path program 13 times [2022-03-01 18:06:56,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:56,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886888766] [2022-03-01 18:06:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:56,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:57,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:57,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886888766] [2022-03-01 18:06:57,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886888766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:57,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633518432] [2022-03-01 18:06:57,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:06:57,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:57,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:57,138 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:57,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 18:06:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:57,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:06:57,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:57,549 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:57,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:06:57,707 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:57,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:06:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:57,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:57,948 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:06:57,948 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 [2022-03-01 18:06:58,296 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:06:58,296 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 [2022-03-01 18:06:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:58,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633518432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:58,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:58,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-03-01 18:06:58,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265543730] [2022-03-01 18:06:58,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:58,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-01 18:06:58,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:58,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-01 18:06:58,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:06:58,611 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) [2022-03-01 18:07:05,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:05,131 INFO L93 Difference]: Finished difference Result 26568 states and 87720 transitions. [2022-03-01 18:07:05,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-01 18:07:05,132 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 [2022-03-01 18:07:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:05,202 INFO L225 Difference]: With dead ends: 26568 [2022-03-01 18:07:05,203 INFO L226 Difference]: Without dead ends: 26148 [2022-03-01 18:07:05,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6546 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3190, Invalid=17980, Unknown=0, NotChecked=0, Total=21170 [2022-03-01 18:07:05,205 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 1102 mSDsluCounter, 2178 mSDsCounter, 0 mSdLazyCounter, 4916 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:05,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1102 Valid, 795 Invalid, 5196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 4916 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-01 18:07:05,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26148 states. [2022-03-01 18:07:05,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26148 to 11503. [2022-03-01 18:07:05,576 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) [2022-03-01 18:07:05,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11503 states to 11503 states and 39385 transitions. [2022-03-01 18:07:05,607 INFO L78 Accepts]: Start accepts. Automaton has 11503 states and 39385 transitions. Word has length 44 [2022-03-01 18:07:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:05,607 INFO L470 AbstractCegarLoop]: Abstraction has 11503 states and 39385 transitions. [2022-03-01 18:07:05,607 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) [2022-03-01 18:07:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 11503 states and 39385 transitions. [2022-03-01 18:07:05,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:07:05,625 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:05,625 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] [2022-03-01 18:07:05,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:05,826 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 [2022-03-01 18:07:05,826 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:07:05,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:05,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1019179365, now seen corresponding path program 14 times [2022-03-01 18:07:05,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:05,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900317552] [2022-03-01 18:07:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:05,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:06,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:06,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900317552] [2022-03-01 18:07:06,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900317552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:06,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213218450] [2022-03-01 18:07:06,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:07:06,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:06,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:06,188 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:06,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:07:06,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:07:06,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:06,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:07:06,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:06,613 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:06,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:07:06,779 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:06,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:07:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:06,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:07,043 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:07:07,043 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 [2022-03-01 18:07:07,330 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:07:07,331 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 [2022-03-01 18:07:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:07,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213218450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:07,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:07,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-01 18:07:07,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923412980] [2022-03-01 18:07:07,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:07,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 18:07:07,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:07,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 18:07:07,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:07:07,628 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) [2022-03-01 18:07:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:25,346 INFO L93 Difference]: Finished difference Result 60197 states and 198437 transitions. [2022-03-01 18:07:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2022-03-01 18:07:25,347 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 [2022-03-01 18:07:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:25,542 INFO L225 Difference]: With dead ends: 60197 [2022-03-01 18:07:25,542 INFO L226 Difference]: Without dead ends: 59437 [2022-03-01 18:07:25,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36617 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=13366, Invalid=77536, Unknown=0, NotChecked=0, Total=90902 [2022-03-01 18:07:25,546 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2216 mSDsluCounter, 2195 mSDsCounter, 0 mSdLazyCounter, 6660 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s 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, 3.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:25,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2216 Valid, 610 Invalid, 7263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 6660 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-01 18:07:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59437 states. [2022-03-01 18:07:26,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59437 to 12041. [2022-03-01 18:07:26,113 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) [2022-03-01 18:07:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12041 states to 12041 states and 41136 transitions. [2022-03-01 18:07:26,145 INFO L78 Accepts]: Start accepts. Automaton has 12041 states and 41136 transitions. Word has length 44 [2022-03-01 18:07:26,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:26,145 INFO L470 AbstractCegarLoop]: Abstraction has 12041 states and 41136 transitions. [2022-03-01 18:07:26,145 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) [2022-03-01 18:07:26,145 INFO L276 IsEmpty]: Start isEmpty. Operand 12041 states and 41136 transitions. [2022-03-01 18:07:26,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:07:26,167 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:26,167 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] [2022-03-01 18:07:26,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-01 18:07:26,372 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 [2022-03-01 18:07:26,372 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:07:26,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:26,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1074071849, now seen corresponding path program 15 times [2022-03-01 18:07:26,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:26,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663612081] [2022-03-01 18:07:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:26,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:26,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:26,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663612081] [2022-03-01 18:07:26,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663612081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:26,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219895812] [2022-03-01 18:07:26,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:07:26,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:26,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:26,674 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:26,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 18:07:26,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:07:26,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:26,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 18:07:26,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:27,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:27,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:27,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:27,551 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 [2022-03-01 18:07:27,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:27,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:27,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:27,768 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 [2022-03-01 18:07:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:27,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:28,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:28,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:28,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:28,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:07:28,094 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 [2022-03-01 18:07:28,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:28,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:28,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:07:28,572 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 [2022-03-01 18:07:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:28,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219895812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:28,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:28,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 50 [2022-03-01 18:07:28,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889069695] [2022-03-01 18:07:28,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:28,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-01 18:07:28,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:28,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-01 18:07:28,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2106, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 18:07:28,907 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) [2022-03-01 18:07:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:37,061 INFO L93 Difference]: Finished difference Result 34676 states and 117325 transitions. [2022-03-01 18:07:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-03-01 18:07:37,061 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 [2022-03-01 18:07:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:37,153 INFO L225 Difference]: With dead ends: 34676 [2022-03-01 18:07:37,153 INFO L226 Difference]: Without dead ends: 34676 [2022-03-01 18:07:37,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15220 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=4899, Invalid=36921, Unknown=0, NotChecked=0, Total=41820 [2022-03-01 18:07:37,155 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1262 mSDsluCounter, 4153 mSDsCounter, 0 mSdLazyCounter, 2958 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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 [2022-03-01 18:07:37,155 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] [2022-03-01 18:07:37,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34676 states. [2022-03-01 18:07:37,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34676 to 14680. [2022-03-01 18:07:37,538 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) [2022-03-01 18:07:37,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14680 states to 14680 states and 50595 transitions. [2022-03-01 18:07:37,576 INFO L78 Accepts]: Start accepts. Automaton has 14680 states and 50595 transitions. Word has length 44 [2022-03-01 18:07:37,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:37,576 INFO L470 AbstractCegarLoop]: Abstraction has 14680 states and 50595 transitions. [2022-03-01 18:07:37,576 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) [2022-03-01 18:07:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 14680 states and 50595 transitions. [2022-03-01 18:07:37,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:07:37,606 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:37,606 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] [2022-03-01 18:07:37,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-01 18:07:37,827 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 [2022-03-01 18:07:37,828 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:07:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:37,828 INFO L85 PathProgramCache]: Analyzing trace with hash -698103635, now seen corresponding path program 16 times [2022-03-01 18:07:37,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:37,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796964477] [2022-03-01 18:07:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:37,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:38,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:38,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796964477] [2022-03-01 18:07:38,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796964477] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:38,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897277801] [2022-03-01 18:07:38,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:07:38,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:38,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:38,153 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:38,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 18:07:38,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:07:38,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:38,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:07:38,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:38,632 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:38,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:07:38,725 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:38,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 18:07:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:38,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:38,980 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:07:38,980 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 [2022-03-01 18:07:39,302 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:07:39,302 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 [2022-03-01 18:07:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:39,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897277801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:39,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:39,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-01 18:07:39,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358351848] [2022-03-01 18:07:39,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:39,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 18:07:39,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:39,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 18:07:39,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2089, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:07:39,595 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) [2022-03-01 18:07:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:48,005 INFO L93 Difference]: Finished difference Result 45385 states and 149970 transitions. [2022-03-01 18:07:48,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-01 18:07:48,005 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 [2022-03-01 18:07:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:48,138 INFO L225 Difference]: With dead ends: 45385 [2022-03-01 18:07:48,138 INFO L226 Difference]: Without dead ends: 44545 [2022-03-01 18:07:48,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10087 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4546, Invalid=26254, Unknown=0, NotChecked=0, Total=30800 [2022-03-01 18:07:48,142 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1603 mSDsluCounter, 1976 mSDsCounter, 0 mSdLazyCounter, 5384 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:48,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1603 Valid, 606 Invalid, 5747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 5384 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-01 18:07:48,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44545 states. [2022-03-01 18:07:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44545 to 12884. [2022-03-01 18:07:48,631 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) [2022-03-01 18:07:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12884 states to 12884 states and 44075 transitions. [2022-03-01 18:07:48,667 INFO L78 Accepts]: Start accepts. Automaton has 12884 states and 44075 transitions. Word has length 44 [2022-03-01 18:07:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:48,667 INFO L470 AbstractCegarLoop]: Abstraction has 12884 states and 44075 transitions. [2022-03-01 18:07:48,668 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) [2022-03-01 18:07:48,668 INFO L276 IsEmpty]: Start isEmpty. Operand 12884 states and 44075 transitions. [2022-03-01 18:07:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:07:48,741 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:48,742 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] [2022-03-01 18:07:48,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:48,943 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 [2022-03-01 18:07:48,943 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:07:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:48,944 INFO L85 PathProgramCache]: Analyzing trace with hash -678348743, now seen corresponding path program 17 times [2022-03-01 18:07:48,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:48,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707731470] [2022-03-01 18:07:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:48,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:49,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:49,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707731470] [2022-03-01 18:07:49,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707731470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:49,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884503231] [2022-03-01 18:07:49,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:07:49,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:49,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:49,291 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:49,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 18:07:49,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:07:49,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:49,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:07:49,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:49,913 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:49,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:07:50,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:50,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:50,016 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 [2022-03-01 18:07:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:50,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:50,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:50,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:50,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:07:50,374 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 [2022-03-01 18:07:50,634 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:07:50,635 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 [2022-03-01 18:07:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:50,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884503231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:50,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:50,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-01 18:07:50,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044864954] [2022-03-01 18:07:50,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:50,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 18:07:50,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:50,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 18:07:50,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2064, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:07:50,968 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) [2022-03-01 18:08:44,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:44,388 INFO L93 Difference]: Finished difference Result 100279 states and 326889 transitions. [2022-03-01 18:08:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 656 states. [2022-03-01 18:08:44,389 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 [2022-03-01 18:08:44,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:44,751 INFO L225 Difference]: With dead ends: 100279 [2022-03-01 18:08:44,752 INFO L226 Difference]: Without dead ends: 90653 [2022-03-01 18:08:44,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 699 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232505 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=56819, Invalid=433881, Unknown=0, NotChecked=0, Total=490700 [2022-03-01 18:08:44,772 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 2896 mSDsluCounter, 4381 mSDsCounter, 0 mSdLazyCounter, 9593 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s 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, 5.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:44,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2896 Valid, 2016 Invalid, 11798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 9593 Invalid, 0 Unknown, 1208 Unchecked, 5.2s Time] [2022-03-01 18:08:44,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90653 states. [2022-03-01 18:08:46,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90653 to 15895. [2022-03-01 18:08:46,291 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) [2022-03-01 18:08:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15895 states to 15895 states and 54439 transitions. [2022-03-01 18:08:46,343 INFO L78 Accepts]: Start accepts. Automaton has 15895 states and 54439 transitions. Word has length 44 [2022-03-01 18:08:46,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:46,343 INFO L470 AbstractCegarLoop]: Abstraction has 15895 states and 54439 transitions. [2022-03-01 18:08:46,344 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) [2022-03-01 18:08:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand 15895 states and 54439 transitions. [2022-03-01 18:08:46,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:08:46,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:46,374 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] [2022-03-01 18:08:46,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-01 18:08:46,576 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 [2022-03-01 18:08:46,576 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:08:46,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:46,577 INFO L85 PathProgramCache]: Analyzing trace with hash -77114961, now seen corresponding path program 18 times [2022-03-01 18:08:46,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:46,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127836713] [2022-03-01 18:08:46,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:46,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:46,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:46,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127836713] [2022-03-01 18:08:46,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127836713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:46,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916884557] [2022-03-01 18:08:46,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:08:46,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:46,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:46,962 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:46,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 18:08:47,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:08:47,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:47,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:08:47,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:47,492 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:08:47,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:08:47,647 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:08:47,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:08:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:47,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:47,964 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:08:47,965 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 [2022-03-01 18:08:48,182 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:08:48,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:08:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:48,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916884557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:48,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:48,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-03-01 18:08:48,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092041413] [2022-03-01 18:08:48,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:48,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-01 18:08:48,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:48,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-01 18:08:48,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1975, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:08:48,606 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) [2022-03-01 18:09:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:09:30,246 INFO L93 Difference]: Finished difference Result 78559 states and 258414 transitions. [2022-03-01 18:09:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 592 states. [2022-03-01 18:09:30,247 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 [2022-03-01 18:09:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:09:30,761 INFO L225 Difference]: With dead ends: 78559 [2022-03-01 18:09:30,761 INFO L226 Difference]: Without dead ends: 77205 [2022-03-01 18:09:30,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 634 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183905 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=40385, Invalid=363475, Unknown=0, NotChecked=0, Total=403860 [2022-03-01 18:09:30,774 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1924 mSDsluCounter, 3774 mSDsCounter, 0 mSdLazyCounter, 9893 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s 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, 4.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:09:30,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1924 Valid, 1468 Invalid, 10576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 9893 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-01 18:09:30,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77205 states. [2022-03-01 18:09:31,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77205 to 16001. [2022-03-01 18:09:31,639 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) [2022-03-01 18:09:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16001 states to 16001 states and 54880 transitions. [2022-03-01 18:09:31,685 INFO L78 Accepts]: Start accepts. Automaton has 16001 states and 54880 transitions. Word has length 44 [2022-03-01 18:09:31,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:09:31,685 INFO L470 AbstractCegarLoop]: Abstraction has 16001 states and 54880 transitions. [2022-03-01 18:09:31,686 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) [2022-03-01 18:09:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 16001 states and 54880 transitions. [2022-03-01 18:09:31,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:09:31,713 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:09:31,713 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] [2022-03-01 18:09:31,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 18:09:31,914 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 [2022-03-01 18:09:31,914 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:09:31,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:09:31,915 INFO L85 PathProgramCache]: Analyzing trace with hash 860665313, now seen corresponding path program 19 times [2022-03-01 18:09:31,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:09:31,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420021105] [2022-03-01 18:09:31,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:09:31,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:09:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:32,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:09:32,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420021105] [2022-03-01 18:09:32,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420021105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:09:32,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374082917] [2022-03-01 18:09:32,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:09:32,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:09:32,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:09:32,319 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:09:32,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 18:09:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:09:32,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:09:32,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:09:32,906 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:09:32,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:09:33,023 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:09:33,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:09:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:33,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:09:33,464 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:09:33,464 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 [2022-03-01 18:09:33,709 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:09:33,710 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 [2022-03-01 18:09:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:09:33,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374082917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:09:33,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:09:33,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-01 18:09:33,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015413939] [2022-03-01 18:09:33,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:09:33,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 18:09:34,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:09:34,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 18:09:34,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:09:34,000 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) [2022-03-01 18:10:15,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:15,992 INFO L93 Difference]: Finished difference Result 80996 states and 264692 transitions. [2022-03-01 18:10:15,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 570 states. [2022-03-01 18:10:15,993 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 [2022-03-01 18:10:15,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:16,225 INFO L225 Difference]: With dead ends: 80996 [2022-03-01 18:10:16,226 INFO L226 Difference]: Without dead ends: 79005 [2022-03-01 18:10:16,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173054 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=39432, Invalid=338178, Unknown=0, NotChecked=0, Total=377610 [2022-03-01 18:10:16,242 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 2315 mSDsluCounter, 3729 mSDsCounter, 0 mSdLazyCounter, 9990 mSolverCounterSat, 760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s 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, 4.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:10:16,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2315 Valid, 1395 Invalid, 10750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [760 Valid, 9990 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-01 18:10:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79005 states. [2022-03-01 18:10:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79005 to 15733. [2022-03-01 18:10:17,235 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) [2022-03-01 18:10:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15733 states to 15733 states and 54067 transitions. [2022-03-01 18:10:17,275 INFO L78 Accepts]: Start accepts. Automaton has 15733 states and 54067 transitions. Word has length 44 [2022-03-01 18:10:17,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:17,275 INFO L470 AbstractCegarLoop]: Abstraction has 15733 states and 54067 transitions. [2022-03-01 18:10:17,275 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) [2022-03-01 18:10:17,275 INFO L276 IsEmpty]: Start isEmpty. Operand 15733 states and 54067 transitions. [2022-03-01 18:10:17,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:10:17,298 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:17,298 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] [2022-03-01 18:10:17,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 18:10:17,498 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 [2022-03-01 18:10:17,499 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:10:17,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:17,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1391795877, now seen corresponding path program 20 times [2022-03-01 18:10:17,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:17,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734883080] [2022-03-01 18:10:17,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:17,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:17,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:17,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734883080] [2022-03-01 18:10:17,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734883080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:17,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468874330] [2022-03-01 18:10:17,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:10:17,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:17,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:17,803 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:17,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 18:10:17,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:10:17,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:17,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:10:17,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:18,333 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:10:18,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:10:18,537 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:10:18,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:10:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:18,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:18,813 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:10:18,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:10:19,051 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:10:19,051 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 [2022-03-01 18:10:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:19,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468874330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:19,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:19,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2022-03-01 18:10:19,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158419909] [2022-03-01 18:10:19,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:19,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-01 18:10:19,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:19,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-01 18:10:19,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:10:19,342 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) [2022-03-01 18:10:41,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:10:41,499 INFO L93 Difference]: Finished difference Result 63955 states and 209608 transitions. [2022-03-01 18:10:41,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 357 states. [2022-03-01 18:10:41,499 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 [2022-03-01 18:10:41,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:10:41,868 INFO L225 Difference]: With dead ends: 63955 [2022-03-01 18:10:41,868 INFO L226 Difference]: Without dead ends: 63155 [2022-03-01 18:10:41,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69376 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=19259, Invalid=140341, Unknown=0, NotChecked=0, Total=159600 [2022-03-01 18:10:41,873 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 [2022-03-01 18:10:41,874 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] [2022-03-01 18:10:41,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63155 states. [2022-03-01 18:10:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63155 to 16979. [2022-03-01 18:10:42,580 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) [2022-03-01 18:10:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16979 states to 16979 states and 58392 transitions. [2022-03-01 18:10:42,719 INFO L78 Accepts]: Start accepts. Automaton has 16979 states and 58392 transitions. Word has length 44 [2022-03-01 18:10:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:10:42,719 INFO L470 AbstractCegarLoop]: Abstraction has 16979 states and 58392 transitions. [2022-03-01 18:10:42,719 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) [2022-03-01 18:10:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 16979 states and 58392 transitions. [2022-03-01 18:10:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:10:42,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:10:42,744 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] [2022-03-01 18:10:42,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-01 18:10:42,945 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 [2022-03-01 18:10:42,945 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:10:42,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:10:42,946 INFO L85 PathProgramCache]: Analyzing trace with hash 884472071, now seen corresponding path program 21 times [2022-03-01 18:10:42,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:10:42,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720849706] [2022-03-01 18:10:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:10:42,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:10:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:10:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:43,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:10:43,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720849706] [2022-03-01 18:10:43,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720849706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:10:43,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882110621] [2022-03-01 18:10:43,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:10:43,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:10:43,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:10:43,299 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:10:43,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 18:10:43,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:10:43,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:10:43,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-01 18:10:43,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:10:43,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:43,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:10:43,793 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 [2022-03-01 18:10:43,942 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:10:43,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:10:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:44,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:10:44,255 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:10:44,255 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 [2022-03-01 18:10:44,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:44,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:10:44,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:10:44,527 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 [2022-03-01 18:10:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:10:44,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882110621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:10:44,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:10:44,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-03-01 18:10:44,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401242899] [2022-03-01 18:10:44,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:10:44,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-01 18:10:44,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:10:44,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-01 18:10:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:10:44,848 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) [2022-03-01 18:11:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:11:27,979 INFO L93 Difference]: Finished difference Result 102003 states and 332162 transitions. [2022-03-01 18:11:27,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 580 states. [2022-03-01 18:11:27,979 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 [2022-03-01 18:11:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:11:28,446 INFO L225 Difference]: With dead ends: 102003 [2022-03-01 18:11:28,446 INFO L226 Difference]: Without dead ends: 100211 [2022-03-01 18:11:28,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 622 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180537 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=45817, Invalid=342935, Unknown=0, NotChecked=0, Total=388752 [2022-03-01 18:11:28,460 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 2287 mSDsluCounter, 3956 mSDsCounter, 0 mSdLazyCounter, 9383 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s 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, 4.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:11:28,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2287 Valid, 1439 Invalid, 11552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 9383 Invalid, 0 Unknown, 1418 Unchecked, 4.8s Time] [2022-03-01 18:11:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100211 states. [2022-03-01 18:11:29,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100211 to 17668. [2022-03-01 18:11:29,570 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) [2022-03-01 18:11:29,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17668 states to 17668 states and 60856 transitions. [2022-03-01 18:11:29,617 INFO L78 Accepts]: Start accepts. Automaton has 17668 states and 60856 transitions. Word has length 44 [2022-03-01 18:11:29,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:11:29,617 INFO L470 AbstractCegarLoop]: Abstraction has 17668 states and 60856 transitions. [2022-03-01 18:11:29,617 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) [2022-03-01 18:11:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 17668 states and 60856 transitions. [2022-03-01 18:11:29,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:11:29,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:11:29,646 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] [2022-03-01 18:11:29,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 18:11:29,846 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 [2022-03-01 18:11:29,847 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:11:29,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:11:29,847 INFO L85 PathProgramCache]: Analyzing trace with hash -33606939, now seen corresponding path program 22 times [2022-03-01 18:11:29,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:11:29,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305966430] [2022-03-01 18:11:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:11:29,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:11:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:11:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:30,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:11:30,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305966430] [2022-03-01 18:11:30,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305966430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:11:30,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273654352] [2022-03-01 18:11:30,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:11:30,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:11:30,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:11:30,212 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:11:30,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 18:11:30,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:11:30,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:11:30,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:11:30,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:11:30,811 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:11:30,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:11:30,996 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:11:30,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:11:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:31,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:11:31,364 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:11:31,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2022-03-01 18:11:31,621 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:11:31,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:11:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:11:31,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273654352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:11:31,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:11:31,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-01 18:11:31,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306882535] [2022-03-01 18:11:31,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:11:31,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 18:11:31,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:11:31,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 18:11:31,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2082, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:11:31,933 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) [2022-03-01 18:12:13,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:13,960 INFO L93 Difference]: Finished difference Result 109389 states and 358634 transitions. [2022-03-01 18:12:13,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 563 states. [2022-03-01 18:12:13,960 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 [2022-03-01 18:12:13,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:14,528 INFO L225 Difference]: With dead ends: 109389 [2022-03-01 18:12:14,528 INFO L226 Difference]: Without dead ends: 106874 [2022-03-01 18:12:14,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 606 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169281 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=39171, Invalid=329885, Unknown=0, NotChecked=0, Total=369056 [2022-03-01 18:12:14,552 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 2699 mSDsluCounter, 2753 mSDsCounter, 0 mSdLazyCounter, 8512 mSolverCounterSat, 992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s 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, 4.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:14,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2699 Valid, 866 Invalid, 9504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [992 Valid, 8512 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-01 18:12:14,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106874 states. [2022-03-01 18:12:15,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106874 to 18383. [2022-03-01 18:12:15,987 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) [2022-03-01 18:12:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18383 states to 18383 states and 63323 transitions. [2022-03-01 18:12:16,047 INFO L78 Accepts]: Start accepts. Automaton has 18383 states and 63323 transitions. Word has length 44 [2022-03-01 18:12:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:16,048 INFO L470 AbstractCegarLoop]: Abstraction has 18383 states and 63323 transitions. [2022-03-01 18:12:16,048 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) [2022-03-01 18:12:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 18383 states and 63323 transitions. [2022-03-01 18:12:16,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:12:16,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:16,182 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] [2022-03-01 18:12:16,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 18:12:16,382 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 [2022-03-01 18:12:16,383 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:12:16,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:16,383 INFO L85 PathProgramCache]: Analyzing trace with hash 272930747, now seen corresponding path program 23 times [2022-03-01 18:12:16,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:16,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058391916] [2022-03-01 18:12:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:16,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:16,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:16,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058391916] [2022-03-01 18:12:16,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058391916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:16,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453269418] [2022-03-01 18:12:16,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:12:16,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:16,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:16,716 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:12:16,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 18:12:16,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:12:16,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:12:16,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:12:16,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:17,228 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:12:17,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:12:17,359 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:12:17,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-01 18:12:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:17,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:17,674 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:12:17,675 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 [2022-03-01 18:12:17,924 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:12:17,924 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 [2022-03-01 18:12:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:18,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453269418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:18,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:18,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 48 [2022-03-01 18:12:18,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020304670] [2022-03-01 18:12:18,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:18,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-01 18:12:18,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:18,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-01 18:12:18,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1982, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:12:18,166 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) [2022-03-01 18:12:40,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:12:40,395 INFO L93 Difference]: Finished difference Result 84029 states and 275540 transitions. [2022-03-01 18:12:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 353 states. [2022-03-01 18:12:40,396 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 [2022-03-01 18:12:40,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:12:40,696 INFO L225 Difference]: With dead ends: 84029 [2022-03-01 18:12:40,697 INFO L226 Difference]: Without dead ends: 82831 [2022-03-01 18:12:40,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68230 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=18314, Invalid=138898, Unknown=0, NotChecked=0, Total=157212 [2022-03-01 18:12:40,703 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 1698 mSDsluCounter, 2076 mSDsCounter, 0 mSdLazyCounter, 6059 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s 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, 3.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:12:40,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1698 Valid, 726 Invalid, 6689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 6059 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-01 18:12:40,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82831 states. [2022-03-01 18:12:41,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82831 to 18613. [2022-03-01 18:12:41,692 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) [2022-03-01 18:12:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18613 states to 18613 states and 64132 transitions. [2022-03-01 18:12:41,741 INFO L78 Accepts]: Start accepts. Automaton has 18613 states and 64132 transitions. Word has length 44 [2022-03-01 18:12:41,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:12:41,741 INFO L470 AbstractCegarLoop]: Abstraction has 18613 states and 64132 transitions. [2022-03-01 18:12:41,741 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) [2022-03-01 18:12:41,741 INFO L276 IsEmpty]: Start isEmpty. Operand 18613 states and 64132 transitions. [2022-03-01 18:12:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:12:41,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:12:41,770 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] [2022-03-01 18:12:41,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-01 18:12:41,971 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 [2022-03-01 18:12:41,971 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:12:41,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:12:41,972 INFO L85 PathProgramCache]: Analyzing trace with hash -645148263, now seen corresponding path program 24 times [2022-03-01 18:12:41,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:12:41,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732803504] [2022-03-01 18:12:41,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:12:41,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:12:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:12:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:42,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:12:42,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732803504] [2022-03-01 18:12:42,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732803504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:12:42,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721895174] [2022-03-01 18:12:42,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:12:42,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:12:42,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:12:42,485 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:12:42,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:12:42,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:12:42,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:12:42,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:12:42,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:12:43,062 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:12:43,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:12:43,183 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:12:43,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:12:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:43,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:12:43,505 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:12:43,505 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 [2022-03-01 18:12:43,760 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:12:43,760 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 [2022-03-01 18:12:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:12:44,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721895174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:12:44,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:12:44,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-01 18:12:44,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741405047] [2022-03-01 18:12:44,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:12:44,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 18:12:44,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:12:44,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 18:12:44,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2083, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:12:44,041 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) [2022-03-01 18:13:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:13:20,217 INFO L93 Difference]: Finished difference Result 103092 states and 337501 transitions. [2022-03-01 18:13:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 489 states. [2022-03-01 18:13:20,218 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 [2022-03-01 18:13:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:13:20,877 INFO L225 Difference]: With dead ends: 103092 [2022-03-01 18:13:20,878 INFO L226 Difference]: Without dead ends: 101564 [2022-03-01 18:13:20,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 532 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127959 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=31003, Invalid=253619, Unknown=0, NotChecked=0, Total=284622 [2022-03-01 18:13:20,893 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2352 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 8721 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s 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, 4.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:20,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2352 Valid, 841 Invalid, 9515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 8721 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-01 18:13:21,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101564 states. [2022-03-01 18:13:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101564 to 18510. [2022-03-01 18:13:22,262 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) [2022-03-01 18:13:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18510 states to 18510 states and 63787 transitions. [2022-03-01 18:13:22,319 INFO L78 Accepts]: Start accepts. Automaton has 18510 states and 63787 transitions. Word has length 44 [2022-03-01 18:13:22,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:13:22,319 INFO L470 AbstractCegarLoop]: Abstraction has 18510 states and 63787 transitions. [2022-03-01 18:13:22,319 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) [2022-03-01 18:13:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 18510 states and 63787 transitions. [2022-03-01 18:13:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 18:13:22,465 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:13:22,465 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] [2022-03-01 18:13:22,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:22,666 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 [2022-03-01 18:13:22,666 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-01 18:13:22,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:13:22,667 INFO L85 PathProgramCache]: Analyzing trace with hash 21285545, now seen corresponding path program 25 times [2022-03-01 18:13:22,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:13:22,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753160366] [2022-03-01 18:13:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:13:22,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:13:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:23,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:13:23,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753160366] [2022-03-01 18:13:23,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753160366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:13:23,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831423517] [2022-03-01 18:13:23,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:13:23,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:13:23,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:13:23,014 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:13:23,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:13:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:13:23,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:13:23,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:13:23,569 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:13:23,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:13:23,663 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:13:23,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 18:13:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:23,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:13:24,020 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:13:24,021 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 [2022-03-01 18:13:24,319 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:13:24,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:13:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:13:24,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831423517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:13:24,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:13:24,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2022-03-01 18:13:24,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056734527] [2022-03-01 18:13:24,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:13:24,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 18:13:24,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:13:24,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 18:13:24,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:13:24,704 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) Received shutdown request... [2022-03-01 18:13:43,089 WARN L244 SmtUtils]: Removed 3 from assertion stack [2022-03-01 18:13:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-03-01 18:13:43,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37340 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=11714, Invalid=81006, Unknown=0, NotChecked=0, Total=92720 [2022-03-01 18:13:43,094 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:13:43,094 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 [2022-03-01 18:13:43,095 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1935 mSDsluCounter, 1999 mSDsCounter, 0 mSdLazyCounter, 6987 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1935 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 7594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 6987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:13:43,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1935 Valid, 535 Invalid, 7594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 6987 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-01 18:13:43,096 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2022-03-01 18:13:43,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 18:13:43,303 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 [2022-03-01 18:13:43,304 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (18510states) and FLOYD_HOARE automaton (currently 260 states, 49 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 63 for 33ms.. [2022-03-01 18:13:43,305 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 5 remaining) [2022-03-01 18:13:43,306 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (2 of 5 remaining) [2022-03-01 18:13:43,306 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (1 of 5 remaining) [2022-03-01 18:13:43,306 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION (0 of 5 remaining) [2022-03-01 18:13:43,309 INFO L732 BasicCegarLoop]: Path program histogram: [25, 2, 1, 1] [2022-03-01 18:13:43,311 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:13:43,311 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:13:43,313 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:13:43 BasicIcfg [2022-03-01 18:13:43,313 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:13:43,314 INFO L158 Benchmark]: Toolchain (without parser) took 705513.39ms. Allocated memory was 179.3MB in the beginning and 3.1GB in the end (delta: 2.9GB). Free memory was 137.4MB in the beginning and 618.5MB in the end (delta: -481.1MB). Peak memory consumption was 2.4GB. Max. memory is 8.0GB. [2022-03-01 18:13:43,314 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 179.3MB. Free memory was 138.7MB in the beginning and 138.5MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:13:43,314 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.68ms. Allocated memory is still 179.3MB. Free memory was 137.4MB in the beginning and 135.8MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-01 18:13:43,314 INFO L158 Benchmark]: Boogie Preprocessor took 26.46ms. Allocated memory is still 179.3MB. Free memory was 135.8MB in the beginning and 134.9MB in the end (delta: 905.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:13:43,314 INFO L158 Benchmark]: RCFGBuilder took 253.64ms. Allocated memory is still 179.3MB. Free memory was 134.7MB in the beginning and 124.8MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 18:13:43,314 INFO L158 Benchmark]: TraceAbstraction took 705196.61ms. Allocated memory was 179.3MB in the beginning and 3.1GB in the end (delta: 2.9GB). Free memory was 124.2MB in the beginning and 618.5MB in the end (delta: -494.2MB). Peak memory consumption was 2.4GB. Max. memory is 8.0GB. [2022-03-01 18:13:43,315 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 0.14ms. Allocated memory is still 179.3MB. Free memory was 138.7MB in the beginning and 138.5MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 31.68ms. Allocated memory is still 179.3MB. Free memory was 137.4MB in the beginning and 135.8MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.46ms. Allocated memory is still 179.3MB. Free memory was 135.8MB in the beginning and 134.9MB in the end (delta: 905.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 253.64ms. Allocated memory is still 179.3MB. Free memory was 134.7MB in the beginning and 124.8MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 705196.61ms. Allocated memory was 179.3MB in the beginning and 3.1GB in the end (delta: 2.9GB). Free memory was 124.2MB in the beginning and 618.5MB in the end (delta: -494.2MB). Peak memory consumption was 2.4GB. 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 (18510states) and FLOYD_HOARE automaton (currently 260 states, 49 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 63 for 33ms.. - 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 (18510states) and FLOYD_HOARE automaton (currently 260 states, 49 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 63 for 33ms.. - 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 (18510states) and FLOYD_HOARE automaton (currently 260 states, 49 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 63 for 33ms.. - 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 (18510states) and FLOYD_HOARE automaton (currently 260 states, 49 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 63 for 33ms.. - 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 (18510states) and FLOYD_HOARE automaton (currently 260 states, 49 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 63 for 33ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 61 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 705.1s, OverallIterations: 29, TraceHistogramMax: 2, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.8s, AutomataDifference: 633.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 51275 SdHoareTripleChecker+Valid, 81.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 51275 mSDsluCounter, 27778 SdHoareTripleChecker+Invalid, 68.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 8600 IncrementalHoareTripleChecker+Unchecked, 67212 mSDsCounter, 16796 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 157261 IncrementalHoareTripleChecker+Invalid, 182657 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16796 mSolverCounterUnsat, 1384 mSDtfsCounter, 157261 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11316 GetRequests, 1549 SyntacticMatches, 11 SemanticMatches, 9755 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2283915 ImplicationChecksByTransitivity, 536.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18613occurred in iteration=27, InterpolantAutomatonStates: 8562, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 18.9s AutomataMinimizationTime, 28 MinimizatonAttempts, 1171212 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 44.6s InterpolantComputationTime, 2266 NumberOfCodeBlocks, 2266 NumberOfCodeBlocksAsserted, 95 NumberOfCheckSat, 3191 ConstructedInterpolants, 25 QuantifiedInterpolants, 39439 SizeOfPredicates, 464 NumberOfNonLiveVariables, 2944 ConjunctsInSsa, 675 ConjunctsInUnsatCore, 77 InterpolantComputations, 6 PerfectInterpolantSequences, 255/1106 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