/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-cons.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:19:41,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:19:41,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:19:41,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:19:41,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 16:19:41,736 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:19:41,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:19:41,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:19:41,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:19:41,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:19:41,738 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:19:41,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:19:41,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:19:41,738 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:19:41,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:19:41,739 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:19:41,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:19:41,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:19:41,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:19:41,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:19:41,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:19:41,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:19:41,740 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:19:41,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:19:41,741 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:19:41,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:19:41,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:19:41,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:19:41,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:19:41,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:19:41,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:19:41,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:19:41,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:19:41,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:19:41,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:19:41,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:19:41,743 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:19:41,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:19:41,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:19:41,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:19:41,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:19:41,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:19:41,968 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:19:41,969 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:19:41,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl [2022-03-15 16:19:41,970 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl' [2022-03-15 16:19:41,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:19:41,990 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:19:41,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:19:41,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:19:41,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:19:42,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:41" (1/1) ... [2022-03-15 16:19:42,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:41" (1/1) ... [2022-03-15 16:19:42,013 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:19:42,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:19:42,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:19:42,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:19:42,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:19:42,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:41" (1/1) ... [2022-03-15 16:19:42,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:41" (1/1) ... [2022-03-15 16:19:42,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:41" (1/1) ... [2022-03-15 16:19:42,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:41" (1/1) ... [2022-03-15 16:19:42,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:41" (1/1) ... [2022-03-15 16:19:42,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:41" (1/1) ... [2022-03-15 16:19:42,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:41" (1/1) ... [2022-03-15 16:19:42,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:19:42,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:19:42,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:19:42,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:19:42,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:41" (1/1) ... [2022-03-15 16:19:42,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:19:42,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:42,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 16:19:42,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 16:19:42,098 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:19:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:19:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:19:42,098 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:19:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:19:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:19:42,098 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:19:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:19:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:19:42,098 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 16:19:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 16:19:42,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 16:19:42,099 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:19:42,136 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:19:42,138 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:19:42,215 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:19:42,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:19:42,227 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:19:42,229 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:19:42 BoogieIcfgContainer [2022-03-15 16:19:42,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:19:42,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:19:42,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:19:42,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:19:42,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:19:41" (1/2) ... [2022-03-15 16:19:42,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64474489 and model type prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:19:42, skipping insertion in model container [2022-03-15 16:19:42,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:19:42" (2/2) ... [2022-03-15 16:19:42,236 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons.wvr.bpl [2022-03-15 16:19:42,240 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:19:42,240 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:19:42,240 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:19:42,241 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:19:42,271 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-15 16:19:42,322 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:19:42,328 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:19:42,328 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 16:19:42,345 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 30 transitions, 84 flow [2022-03-15 16:19:42,437 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 16:19:42,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:42,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:42,461 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:19:42,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:42,469 INFO L85 PathProgramCache]: Analyzing trace with hash 785752709, now seen corresponding path program 1 times [2022-03-15 16:19:42,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:42,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101185642] [2022-03-15 16:19:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:42,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:42,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:42,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101185642] [2022-03-15 16:19:42,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101185642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:19:42,634 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:19:42,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:19:42,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144133003] [2022-03-15 16:19:42,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:19:42,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:19:42,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:42,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:19:42,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:19:42,664 INFO L87 Difference]: Start difference. First operand has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:42,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:42,715 INFO L93 Difference]: Finished difference Result 172 states and 413 transitions. [2022-03-15 16:19:42,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:19:42,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 16:19:42,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:42,726 INFO L225 Difference]: With dead ends: 172 [2022-03-15 16:19:42,726 INFO L226 Difference]: Without dead ends: 109 [2022-03-15 16:19:42,727 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 [2022-03-15 16:19:42,731 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:42,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:19:42,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-15 16:19:42,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-15 16:19:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3055555555555554) internal successors, (249), 108 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 249 transitions. [2022-03-15 16:19:42,822 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 249 transitions. Word has length 19 [2022-03-15 16:19:42,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:42,823 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 249 transitions. [2022-03-15 16:19:42,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:42,824 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 249 transitions. [2022-03-15 16:19:42,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 16:19:42,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:42,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:42,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:19:42,826 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:19:42,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:42,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1380410419, now seen corresponding path program 2 times [2022-03-15 16:19:42,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:42,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857492770] [2022-03-15 16:19:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:42,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:42,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:42,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857492770] [2022-03-15 16:19:42,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857492770] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:19:42,915 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:19:42,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:19:42,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92400048] [2022-03-15 16:19:42,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:19:42,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:19:42,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:42,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:19:42,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:19:42,917 INFO L87 Difference]: Start difference. First operand 109 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:43,022 INFO L93 Difference]: Finished difference Result 190 states and 436 transitions. [2022-03-15 16:19:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:19:43,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 16:19:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:43,026 INFO L225 Difference]: With dead ends: 190 [2022-03-15 16:19:43,026 INFO L226 Difference]: Without dead ends: 142 [2022-03-15 16:19:43,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:19:43,028 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:43,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 27 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:19:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-15 16:19:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-03-15 16:19:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3404255319148937) internal successors, (330), 141 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 330 transitions. [2022-03-15 16:19:43,044 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 330 transitions. Word has length 19 [2022-03-15 16:19:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:43,045 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 330 transitions. [2022-03-15 16:19:43,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 330 transitions. [2022-03-15 16:19:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:19:43,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:43,047 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] [2022-03-15 16:19:43,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:19:43,048 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:19:43,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:43,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1081760350, now seen corresponding path program 1 times [2022-03-15 16:19:43,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:43,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63963790] [2022-03-15 16:19:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:43,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:43,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:43,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63963790] [2022-03-15 16:19:43,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63963790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:19:43,089 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:19:43,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:19:43,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388307453] [2022-03-15 16:19:43,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:19:43,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:19:43,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:43,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:19:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:19:43,094 INFO L87 Difference]: Start difference. First operand 142 states and 330 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:43,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:43,110 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2022-03-15 16:19:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:19:43,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:19:43,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:43,112 INFO L225 Difference]: With dead ends: 164 [2022-03-15 16:19:43,112 INFO L226 Difference]: Without dead ends: 152 [2022-03-15 16:19:43,113 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 [2022-03-15 16:19:43,114 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:43,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:19:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-15 16:19:43,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-03-15 16:19:43,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.3178807947019866) internal successors, (350), 151 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 350 transitions. [2022-03-15 16:19:43,126 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 350 transitions. Word has length 22 [2022-03-15 16:19:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:43,126 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 350 transitions. [2022-03-15 16:19:43,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 350 transitions. [2022-03-15 16:19:43,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 16:19:43,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:43,128 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] [2022-03-15 16:19:43,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 16:19:43,128 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:19:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:43,129 INFO L85 PathProgramCache]: Analyzing trace with hash -220317154, now seen corresponding path program 1 times [2022-03-15 16:19:43,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:43,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597559369] [2022-03-15 16:19:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:43,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:43,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:43,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597559369] [2022-03-15 16:19:43,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597559369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:43,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757562104] [2022-03-15 16:19:43,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:43,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:43,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:43,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:43,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:19:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:43,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 16:19:43,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:43,689 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 [2022-03-15 16:19:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:43,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:43,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:19:43,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 16:19:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:44,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757562104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:44,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:44,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 16:19:44,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300378351] [2022-03-15 16:19:44,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:44,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:19:44,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:44,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:19:44,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:19:44,027 INFO L87 Difference]: Start difference. First operand 152 states and 350 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:44,548 INFO L93 Difference]: Finished difference Result 358 states and 819 transitions. [2022-03-15 16:19:44,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:19:44,548 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 16:19:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:44,550 INFO L225 Difference]: With dead ends: 358 [2022-03-15 16:19:44,550 INFO L226 Difference]: Without dead ends: 268 [2022-03-15 16:19:44,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:19:44,551 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 251 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:44,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 115 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:19:44,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-03-15 16:19:44,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 185. [2022-03-15 16:19:44,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.342391304347826) internal successors, (431), 184 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 431 transitions. [2022-03-15 16:19:44,580 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 431 transitions. Word has length 25 [2022-03-15 16:19:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:44,580 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 431 transitions. [2022-03-15 16:19:44,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:44,580 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 431 transitions. [2022-03-15 16:19:44,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:19:44,582 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:44,582 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] [2022-03-15 16:19:44,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:44,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:44,783 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:19:44,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:44,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1335000105, now seen corresponding path program 2 times [2022-03-15 16:19:44,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:44,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681269462] [2022-03-15 16:19:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:44,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:44,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:44,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681269462] [2022-03-15 16:19:44,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681269462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:44,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948241694] [2022-03-15 16:19:44,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:19:44,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:44,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:44,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:44,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:19:44,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:19:44,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:44,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:19:44,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:44,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:44,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948241694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:44,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:44,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 16:19:44,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106420380] [2022-03-15 16:19:44,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:44,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:19:44,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:44,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:19:44,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:19:44,995 INFO L87 Difference]: Start difference. First operand 185 states and 431 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:45,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:45,023 INFO L93 Difference]: Finished difference Result 496 states and 1143 transitions. [2022-03-15 16:19:45,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:19:45,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 16:19:45,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:45,026 INFO L225 Difference]: With dead ends: 496 [2022-03-15 16:19:45,026 INFO L226 Difference]: Without dead ends: 454 [2022-03-15 16:19:45,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:19:45,027 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:45,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 65 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:19:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-03-15 16:19:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 336. [2022-03-15 16:19:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.4298507462686567) internal successors, (814), 335 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 814 transitions. [2022-03-15 16:19:45,040 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 814 transitions. Word has length 28 [2022-03-15 16:19:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:45,041 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 814 transitions. [2022-03-15 16:19:45,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 814 transitions. [2022-03-15 16:19:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:19:45,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:45,043 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-03-15 16:19:45,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-15 16:19:45,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:45,268 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:19:45,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:45,268 INFO L85 PathProgramCache]: Analyzing trace with hash -528291211, now seen corresponding path program 3 times [2022-03-15 16:19:45,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:45,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371859508] [2022-03-15 16:19:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:45,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:45,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:45,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371859508] [2022-03-15 16:19:45,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371859508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:45,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707363819] [2022-03-15 16:19:45,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:19:45,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:45,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:45,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:45,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:19:45,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:19:45,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:45,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:19:45,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:45,883 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:19:45,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-15 16:19:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:45,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:46,226 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:19:46,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 51 [2022-03-15 16:19:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:46,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707363819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:46,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:46,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-15 16:19:46,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526684325] [2022-03-15 16:19:46,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:46,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:19:46,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:46,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:19:46,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:19:46,496 INFO L87 Difference]: Start difference. First operand 336 states and 814 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:53,077 INFO L93 Difference]: Finished difference Result 2570 states and 6225 transitions. [2022-03-15 16:19:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-03-15 16:19:53,077 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:19:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:53,090 INFO L225 Difference]: With dead ends: 2570 [2022-03-15 16:19:53,090 INFO L226 Difference]: Without dead ends: 1697 [2022-03-15 16:19:53,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11757 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5243, Invalid=26977, Unknown=0, NotChecked=0, Total=32220 [2022-03-15 16:19:53,102 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1193 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:53,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 512 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:19:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2022-03-15 16:19:53,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 421. [2022-03-15 16:19:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.4642857142857144) internal successors, (1035), 420 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1035 transitions. [2022-03-15 16:19:53,133 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1035 transitions. Word has length 31 [2022-03-15 16:19:53,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:53,133 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1035 transitions. [2022-03-15 16:19:53,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1035 transitions. [2022-03-15 16:19:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:19:53,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:53,137 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-03-15 16:19:53,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:53,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:53,351 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:19:53,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:53,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1420855431, now seen corresponding path program 4 times [2022-03-15 16:19:53,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:53,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912574473] [2022-03-15 16:19:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:53,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:53,534 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:53,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912574473] [2022-03-15 16:19:53,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912574473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:53,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958063882] [2022-03-15 16:19:53,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:19:53,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:53,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:53,536 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:53,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:19:53,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:19:53,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:53,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:19:53,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:53,886 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:19:53,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-15 16:19:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:53,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:54,159 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:19:54,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 51 [2022-03-15 16:19:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:54,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958063882] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:54,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:54,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 16:19:54,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945246960] [2022-03-15 16:19:54,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:54,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:19:54,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:54,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:19:54,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:19:54,405 INFO L87 Difference]: Start difference. First operand 421 states and 1035 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:58,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:58,512 INFO L93 Difference]: Finished difference Result 2028 states and 4820 transitions. [2022-03-15 16:19:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-15 16:19:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:19:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:58,521 INFO L225 Difference]: With dead ends: 2028 [2022-03-15 16:19:58,521 INFO L226 Difference]: Without dead ends: 1858 [2022-03-15 16:19:58,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5973 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3143, Invalid=14413, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 16:19:58,526 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 550 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:58,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 293 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:19:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-03-15 16:19:58,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 477. [2022-03-15 16:19:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.4978991596638656) internal successors, (1189), 476 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1189 transitions. [2022-03-15 16:19:58,549 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1189 transitions. Word has length 31 [2022-03-15 16:19:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:58,549 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1189 transitions. [2022-03-15 16:19:58,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1189 transitions. [2022-03-15 16:19:58,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:19:58,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:58,551 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-03-15 16:19:58,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:58,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:58,759 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:19:58,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:58,760 INFO L85 PathProgramCache]: Analyzing trace with hash 256367733, now seen corresponding path program 5 times [2022-03-15 16:19:58,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:58,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859569183] [2022-03-15 16:19:58,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:58,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:58,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:58,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859569183] [2022-03-15 16:19:58,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859569183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:58,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880056023] [2022-03-15 16:19:58,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:19:58,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:58,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:58,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:58,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:19:59,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:19:59,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:59,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:19:59,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:59,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:59,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:59,421 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 [2022-03-15 16:19:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:59,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:59,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:59,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:59,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:19:59,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 51 [2022-03-15 16:19:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:59,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880056023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:59,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:59,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-15 16:19:59,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203166701] [2022-03-15 16:19:59,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:59,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:19:59,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:19:59,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:19:59,974 INFO L87 Difference]: Start difference. First operand 477 states and 1189 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:10,955 INFO L93 Difference]: Finished difference Result 6877 states and 16443 transitions. [2022-03-15 16:20:10,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-03-15 16:20:10,955 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:20:10,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:10,975 INFO L225 Difference]: With dead ends: 6877 [2022-03-15 16:20:10,976 INFO L226 Difference]: Without dead ends: 5277 [2022-03-15 16:20:10,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38288 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=13473, Invalid=70917, Unknown=0, NotChecked=0, Total=84390 [2022-03-15 16:20:10,984 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1278 mSDsluCounter, 1871 mSDsCounter, 0 mSdLazyCounter, 2737 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:10,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 1016 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2737 Invalid, 0 Unknown, 323 Unchecked, 1.6s Time] [2022-03-15 16:20:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2022-03-15 16:20:11,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 959. [2022-03-15 16:20:11,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 2.6085594989561587) internal successors, (2499), 958 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:11,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2499 transitions. [2022-03-15 16:20:11,037 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2499 transitions. Word has length 31 [2022-03-15 16:20:11,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:11,037 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 2499 transitions. [2022-03-15 16:20:11,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:11,038 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2499 transitions. [2022-03-15 16:20:11,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:20:11,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:11,040 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-03-15 16:20:11,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:11,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:11,262 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:20:11,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:11,263 INFO L85 PathProgramCache]: Analyzing trace with hash 693727769, now seen corresponding path program 6 times [2022-03-15 16:20:11,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:11,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405068104] [2022-03-15 16:20:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:11,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:20:11,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:11,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405068104] [2022-03-15 16:20:11,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405068104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:11,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732869959] [2022-03-15 16:20:11,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:20:11,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:11,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:11,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:11,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:20:11,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:20:11,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:11,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:20:11,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:11,792 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:20:11,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-15 16:20:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:11,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:12,033 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:20:12,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 51 [2022-03-15 16:20:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:12,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732869959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:12,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:12,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2022-03-15 16:20:12,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209272932] [2022-03-15 16:20:12,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:12,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:20:12,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:12,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:20:12,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:20:12,202 INFO L87 Difference]: Start difference. First operand 959 states and 2499 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:18,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:18,379 INFO L93 Difference]: Finished difference Result 5655 states and 14099 transitions. [2022-03-15 16:20:18,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-03-15 16:20:18,379 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:20:18,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:18,395 INFO L225 Difference]: With dead ends: 5655 [2022-03-15 16:20:18,395 INFO L226 Difference]: Without dead ends: 5002 [2022-03-15 16:20:18,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16724 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6779, Invalid=32623, Unknown=0, NotChecked=0, Total=39402 [2022-03-15 16:20:18,399 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 921 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:18,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [921 Valid, 845 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:20:18,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2022-03-15 16:20:18,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 1343. [2022-03-15 16:20:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 2.615499254843517) internal successors, (3510), 1342 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 3510 transitions. [2022-03-15 16:20:18,455 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 3510 transitions. Word has length 31 [2022-03-15 16:20:18,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:18,455 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 3510 transitions. [2022-03-15 16:20:18,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 3510 transitions. [2022-03-15 16:20:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:20:18,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:18,459 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-03-15 16:20:18,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:18,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:18,678 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:20:18,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:18,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2111481487, now seen corresponding path program 7 times [2022-03-15 16:20:18,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:18,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12004666] [2022-03-15 16:20:18,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:18,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:18,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:18,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12004666] [2022-03-15 16:20:18,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12004666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:18,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222362662] [2022-03-15 16:20:18,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:20:18,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:18,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:18,853 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:18,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:20:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:18,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:20:18,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:19,171 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:20:19,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-15 16:20:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:19,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:19,434 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:20:19,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 51 [2022-03-15 16:20:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:19,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222362662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:19,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:19,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-15 16:20:19,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123333989] [2022-03-15 16:20:19,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:19,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:20:19,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:19,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:20:19,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:20:19,601 INFO L87 Difference]: Start difference. First operand 1343 states and 3510 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:25,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:25,420 INFO L93 Difference]: Finished difference Result 3910 states and 9739 transitions. [2022-03-15 16:20:25,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-15 16:20:25,420 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:20:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:25,432 INFO L225 Difference]: With dead ends: 3910 [2022-03-15 16:20:25,432 INFO L226 Difference]: Without dead ends: 2974 [2022-03-15 16:20:25,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10853 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5059, Invalid=25043, Unknown=0, NotChecked=0, Total=30102 [2022-03-15 16:20:25,434 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 754 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 2594 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 2594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:25,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 647 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 2594 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:20:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2022-03-15 16:20:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 1401. [2022-03-15 16:20:25,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 2.6135714285714284) internal successors, (3659), 1400 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 3659 transitions. [2022-03-15 16:20:25,470 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 3659 transitions. Word has length 31 [2022-03-15 16:20:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:25,470 INFO L470 AbstractCegarLoop]: Abstraction has 1401 states and 3659 transitions. [2022-03-15 16:20:25,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 3659 transitions. [2022-03-15 16:20:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:20:25,473 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:25,473 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-03-15 16:20:25,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:25,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:25,688 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:20:25,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:25,688 INFO L85 PathProgramCache]: Analyzing trace with hash -911119041, now seen corresponding path program 8 times [2022-03-15 16:20:25,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:25,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513908528] [2022-03-15 16:20:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:25,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:20:25,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:25,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513908528] [2022-03-15 16:20:25,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513908528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:25,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047072866] [2022-03-15 16:20:25,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:20:25,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:25,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:25,860 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:25,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:20:25,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:20:25,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:25,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:20:25,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:26,136 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:20:26,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-15 16:20:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:26,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:26,372 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:20:26,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 51 [2022-03-15 16:20:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:26,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047072866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:26,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:26,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2022-03-15 16:20:26,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44445525] [2022-03-15 16:20:26,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:26,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:20:26,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:26,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:20:26,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:20:26,543 INFO L87 Difference]: Start difference. First operand 1401 states and 3659 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:30,237 INFO L93 Difference]: Finished difference Result 3992 states and 9944 transitions. [2022-03-15 16:20:30,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-15 16:20:30,237 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:20:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:30,246 INFO L225 Difference]: With dead ends: 3992 [2022-03-15 16:20:30,246 INFO L226 Difference]: Without dead ends: 3412 [2022-03-15 16:20:30,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6022 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3275, Invalid=13495, Unknown=0, NotChecked=0, Total=16770 [2022-03-15 16:20:30,248 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 761 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:30,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 453 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:20:30,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2022-03-15 16:20:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 1525. [2022-03-15 16:20:30,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 2.6122047244094486) internal successors, (3981), 1524 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 3981 transitions. [2022-03-15 16:20:30,287 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 3981 transitions. Word has length 31 [2022-03-15 16:20:30,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:30,287 INFO L470 AbstractCegarLoop]: Abstraction has 1525 states and 3981 transitions. [2022-03-15 16:20:30,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 3981 transitions. [2022-03-15 16:20:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:20:30,290 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:30,290 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:30,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:30,503 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,SelfDestructingSolverStorable10 [2022-03-15 16:20:30,503 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:20:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2139987936, now seen corresponding path program 9 times [2022-03-15 16:20:30,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:30,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781661403] [2022-03-15 16:20:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:30,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:30,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:30,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781661403] [2022-03-15 16:20:30,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781661403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:30,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640298736] [2022-03-15 16:20:30,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:20:30,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:30,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:30,546 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:30,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:20:30,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:20:30,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:30,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:20:30,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:30,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:30,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640298736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:30,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:30,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-15 16:20:30,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141545552] [2022-03-15 16:20:30,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:30,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:20:30,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:30,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:20:30,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:20:30,707 INFO L87 Difference]: Start difference. First operand 1525 states and 3981 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:30,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:30,734 INFO L93 Difference]: Finished difference Result 2453 states and 6384 transitions. [2022-03-15 16:20:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:20:30,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:20:30,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:30,740 INFO L225 Difference]: With dead ends: 2453 [2022-03-15 16:20:30,740 INFO L226 Difference]: Without dead ends: 2396 [2022-03-15 16:20:30,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:20:30,740 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 79 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:30,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 70 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:20:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2022-03-15 16:20:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2033. [2022-03-15 16:20:30,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 2.6663385826771653) internal successors, (5418), 2032 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 5418 transitions. [2022-03-15 16:20:30,779 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 5418 transitions. Word has length 34 [2022-03-15 16:20:30,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:30,779 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 5418 transitions. [2022-03-15 16:20:30,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:30,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 5418 transitions. [2022-03-15 16:20:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:20:30,783 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:30,783 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:30,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:31,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:31,003 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:20:31,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:31,004 INFO L85 PathProgramCache]: Analyzing trace with hash -293873602, now seen corresponding path program 10 times [2022-03-15 16:20:31,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:31,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211943640] [2022-03-15 16:20:31,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:31,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:31,243 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:31,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211943640] [2022-03-15 16:20:31,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211943640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:31,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003562618] [2022-03-15 16:20:31,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:20:31,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:31,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:31,244 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:31,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:20:31,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:20:31,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:31,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:20:31,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:31,726 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:20:31,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:20:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:31,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:32,164 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:20:32,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-15 16:20:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:32,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003562618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:32,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:32,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:20:32,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979478303] [2022-03-15 16:20:32,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:32,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:20:32,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:32,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:20:32,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:20:32,805 INFO L87 Difference]: Start difference. First operand 2033 states and 5418 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:45,331 INFO L93 Difference]: Finished difference Result 7888 states and 19557 transitions. [2022-03-15 16:20:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-03-15 16:20:45,332 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:20:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:45,346 INFO L225 Difference]: With dead ends: 7888 [2022-03-15 16:20:45,346 INFO L226 Difference]: Without dead ends: 6844 [2022-03-15 16:20:45,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36898 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=13021, Invalid=78485, Unknown=0, NotChecked=0, Total=91506 [2022-03-15 16:20:45,351 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1619 mSDsluCounter, 2702 mSDsCounter, 0 mSdLazyCounter, 4785 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 5373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 4785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:45,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1619 Valid, 1449 Invalid, 5373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 4785 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-15 16:20:45,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2022-03-15 16:20:45,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 2385. [2022-03-15 16:20:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2384 states have (on average 2.670302013422819) internal successors, (6366), 2384 states have internal predecessors, (6366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 6366 transitions. [2022-03-15 16:20:45,456 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 6366 transitions. Word has length 37 [2022-03-15 16:20:45,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:45,456 INFO L470 AbstractCegarLoop]: Abstraction has 2385 states and 6366 transitions. [2022-03-15 16:20:45,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 6366 transitions. [2022-03-15 16:20:45,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:20:45,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:45,461 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:45,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:45,677 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,SelfDestructingSolverStorable12 [2022-03-15 16:20:45,677 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:20:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:45,678 INFO L85 PathProgramCache]: Analyzing trace with hash 609080936, now seen corresponding path program 11 times [2022-03-15 16:20:45,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:45,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976834936] [2022-03-15 16:20:45,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:45,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:45,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:45,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976834936] [2022-03-15 16:20:45,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976834936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:45,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880709506] [2022-03-15 16:20:45,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:20:45,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:45,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:45,934 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:45,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:20:45,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:20:45,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:45,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:20:45,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:46,418 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:20:46,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:20:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:46,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:46,898 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:20:46,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-15 16:20:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:47,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880709506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:47,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:47,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:20:47,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148201527] [2022-03-15 16:20:47,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:47,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:20:47,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:20:47,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:20:47,428 INFO L87 Difference]: Start difference. First operand 2385 states and 6366 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2022-03-15 16:21:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:05,846 INFO L93 Difference]: Finished difference Result 11643 states and 28850 transitions. [2022-03-15 16:21:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 336 states. [2022-03-15 16:21:05,847 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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 37 [2022-03-15 16:21:05,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:05,869 INFO L225 Difference]: With dead ends: 11643 [2022-03-15 16:21:05,869 INFO L226 Difference]: Without dead ends: 10173 [2022-03-15 16:21:05,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 376 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59584 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=19211, Invalid=123295, Unknown=0, NotChecked=0, Total=142506 [2022-03-15 16:21:05,876 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 1401 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 5917 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 6653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 5917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:05,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1401 Valid, 1490 Invalid, 6653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 5917 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-15 16:21:05,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10173 states. [2022-03-15 16:21:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10173 to 2603. [2022-03-15 16:21:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.68293620292083) internal successors, (6981), 2602 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 6981 transitions. [2022-03-15 16:21:05,974 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 6981 transitions. Word has length 37 [2022-03-15 16:21:05,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:05,974 INFO L470 AbstractCegarLoop]: Abstraction has 2603 states and 6981 transitions. [2022-03-15 16:21:05,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2022-03-15 16:21:05,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 6981 transitions. [2022-03-15 16:21:05,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:21:05,980 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:05,980 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:06,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:06,203 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,SelfDestructingSolverStorable13 [2022-03-15 16:21:06,203 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:21:06,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash 725042942, now seen corresponding path program 12 times [2022-03-15 16:21:06,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:06,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619915455] [2022-03-15 16:21:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:06,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:06,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:06,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619915455] [2022-03-15 16:21:06,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619915455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:06,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492879138] [2022-03-15 16:21:06,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:21:06,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:06,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:06,452 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:06,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:21:06,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:21:06,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:06,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:21:06,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:07,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:07,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:07,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:07,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:07,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:07,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:07,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-03-15 16:21:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:07,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:08,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:08,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:08,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:08,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:08,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:08,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:08,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:21:08,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 32 treesize of output 92 [2022-03-15 16:21:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:09,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492879138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:09,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:09,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:21:09,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003843612] [2022-03-15 16:21:09,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:09,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:21:09,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:09,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:21:09,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:21:09,052 INFO L87 Difference]: Start difference. First operand 2603 states and 6981 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2022-03-15 16:21:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:12,064 INFO L93 Difference]: Finished difference Result 4636 states and 12333 transitions. [2022-03-15 16:21:12,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-15 16:21:12,065 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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 37 [2022-03-15 16:21:12,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:12,074 INFO L225 Difference]: With dead ends: 4636 [2022-03-15 16:21:12,074 INFO L226 Difference]: Without dead ends: 4587 [2022-03-15 16:21:12,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4449 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2197, Invalid=11845, Unknown=0, NotChecked=0, Total=14042 [2022-03-15 16:21:12,076 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 288 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1733 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:12,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 501 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 725 Invalid, 0 Unknown, 1733 Unchecked, 0.3s Time] [2022-03-15 16:21:12,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2022-03-15 16:21:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 2757. [2022-03-15 16:21:12,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2756 states have (on average 2.6756168359941945) internal successors, (7374), 2756 states have internal predecessors, (7374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 7374 transitions. [2022-03-15 16:21:12,137 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 7374 transitions. Word has length 37 [2022-03-15 16:21:12,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:12,137 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 7374 transitions. [2022-03-15 16:21:12,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2022-03-15 16:21:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 7374 transitions. [2022-03-15 16:21:12,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:21:12,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:12,144 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:12,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-15 16:21:12,365 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,SelfDestructingSolverStorable14 [2022-03-15 16:21:12,366 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:21:12,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:12,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1062011650, now seen corresponding path program 13 times [2022-03-15 16:21:12,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:12,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532376097] [2022-03-15 16:21:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:12,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:12,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:12,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532376097] [2022-03-15 16:21:12,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532376097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:12,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751366321] [2022-03-15 16:21:12,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:21:12,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:12,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:12,624 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:12,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:21:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:12,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:21:12,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:13,057 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:21:13,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:21:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:13,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:13,540 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:21:13,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-15 16:21:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:13,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751366321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:13,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:13,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:21:13,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507532764] [2022-03-15 16:21:13,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:13,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:21:13,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:13,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:21:13,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:21:13,973 INFO L87 Difference]: Start difference. First operand 2757 states and 7374 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:32,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:32,560 INFO L93 Difference]: Finished difference Result 13846 states and 34888 transitions. [2022-03-15 16:21:32,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 350 states. [2022-03-15 16:21:32,560 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:21:32,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:32,578 INFO L225 Difference]: With dead ends: 13846 [2022-03-15 16:21:32,578 INFO L226 Difference]: Without dead ends: 12834 [2022-03-15 16:21:32,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65124 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=20027, Invalid=133245, Unknown=0, NotChecked=0, Total=153272 [2022-03-15 16:21:32,583 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1134 mSDsluCounter, 3409 mSDsCounter, 0 mSdLazyCounter, 5924 mSolverCounterSat, 621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 6545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 621 IncrementalHoareTripleChecker+Valid, 5924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:32,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 1784 Invalid, 6545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [621 Valid, 5924 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-15 16:21:32,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2022-03-15 16:21:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 3327. [2022-03-15 16:21:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.7194828622970535) internal successors, (9045), 3326 states have internal predecessors, (9045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 9045 transitions. [2022-03-15 16:21:32,677 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 9045 transitions. Word has length 37 [2022-03-15 16:21:32,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:32,678 INFO L470 AbstractCegarLoop]: Abstraction has 3327 states and 9045 transitions. [2022-03-15 16:21:32,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 9045 transitions. [2022-03-15 16:21:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:21:32,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:32,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:32,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:32,899 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,SelfDestructingSolverStorable15 [2022-03-15 16:21:32,899 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:21:32,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:32,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2026265026, now seen corresponding path program 14 times [2022-03-15 16:21:32,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:32,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787023479] [2022-03-15 16:21:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:32,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:33,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:33,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787023479] [2022-03-15 16:21:33,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787023479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:33,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680485166] [2022-03-15 16:21:33,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:21:33,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:33,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:33,172 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:33,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:21:33,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:21:33,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:33,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:21:33,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:33,697 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:21:33,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:21:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:33,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:34,143 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:21:34,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-15 16:21:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:34,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680485166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:34,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:34,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:21:34,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95389857] [2022-03-15 16:21:34,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:34,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:21:34,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:34,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:21:34,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1801, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:21:34,613 INFO L87 Difference]: Start difference. First operand 3327 states and 9045 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2022-03-15 16:21:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:54,665 INFO L93 Difference]: Finished difference Result 16809 states and 42113 transitions. [2022-03-15 16:21:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 373 states. [2022-03-15 16:21:54,666 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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 37 [2022-03-15 16:21:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:54,685 INFO L225 Difference]: With dead ends: 16809 [2022-03-15 16:21:54,685 INFO L226 Difference]: Without dead ends: 14346 [2022-03-15 16:21:54,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76932 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=24383, Invalid=147427, Unknown=0, NotChecked=0, Total=171810 [2022-03-15 16:21:54,691 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1850 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 4610 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1850 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 5525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 4610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:54,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1850 Valid, 1276 Invalid, 5525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 4610 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-15 16:21:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14346 states. [2022-03-15 16:21:54,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14346 to 3535. [2022-03-15 16:21:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 2.7190152801358236) internal successors, (9609), 3534 states have internal predecessors, (9609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 9609 transitions. [2022-03-15 16:21:54,808 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 9609 transitions. Word has length 37 [2022-03-15 16:21:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:54,809 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 9609 transitions. [2022-03-15 16:21:54,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2022-03-15 16:21:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 9609 transitions. [2022-03-15 16:21:54,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:21:54,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:54,816 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:54,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:55,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:55,032 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:21:55,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:55,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1277334372, now seen corresponding path program 15 times [2022-03-15 16:21:55,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:55,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069060788] [2022-03-15 16:21:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:55,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:55,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:55,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069060788] [2022-03-15 16:21:55,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069060788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:55,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132072753] [2022-03-15 16:21:55,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:21:55,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:55,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:55,282 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:55,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:21:55,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:21:55,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:55,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 16:21:55,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:55,789 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:21:55,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:21:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:55,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:56,267 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:21:56,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 39 treesize of output 103 [2022-03-15 16:21:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:56,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132072753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:56,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:56,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:21:56,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892029286] [2022-03-15 16:21:56,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:56,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:21:56,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:56,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:21:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1810, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:21:56,855 INFO L87 Difference]: Start difference. First operand 3535 states and 9609 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2022-03-15 16:22:18,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:18,598 INFO L93 Difference]: Finished difference Result 15579 states and 39558 transitions. [2022-03-15 16:22:18,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 397 states. [2022-03-15 16:22:18,598 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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 37 [2022-03-15 16:22:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:18,618 INFO L225 Difference]: With dead ends: 15579 [2022-03-15 16:22:18,619 INFO L226 Difference]: Without dead ends: 14122 [2022-03-15 16:22:18,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 437 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86518 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=24782, Invalid=167500, Unknown=0, NotChecked=0, Total=192282 [2022-03-15 16:22:18,627 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1551 mSDsluCounter, 3347 mSDsCounter, 0 mSdLazyCounter, 6306 mSolverCounterSat, 820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 7126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 820 IncrementalHoareTripleChecker+Valid, 6306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:18,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1551 Valid, 1653 Invalid, 7126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [820 Valid, 6306 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-15 16:22:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14122 states. [2022-03-15 16:22:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14122 to 4322. [2022-03-15 16:22:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4321 states have (on average 2.7283036334181903) internal successors, (11789), 4321 states have internal predecessors, (11789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:18,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 11789 transitions. [2022-03-15 16:22:18,767 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 11789 transitions. Word has length 37 [2022-03-15 16:22:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:18,768 INFO L470 AbstractCegarLoop]: Abstraction has 4322 states and 11789 transitions. [2022-03-15 16:22:18,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2022-03-15 16:22:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 11789 transitions. [2022-03-15 16:22:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:22:18,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:18,776 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:18,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:18,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 16:22:18,983 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:22:18,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:18,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1393296378, now seen corresponding path program 16 times [2022-03-15 16:22:18,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:18,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054728679] [2022-03-15 16:22:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:18,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:19,219 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:19,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054728679] [2022-03-15 16:22:19,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054728679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:19,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878774238] [2022-03-15 16:22:19,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:22:19,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:19,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:19,221 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:19,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:22:19,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:22:19,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:22:19,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:19,678 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:22:19,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:22:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:19,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:20,125 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:22:20,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-15 16:22:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:20,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878774238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:20,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:20,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:22:20,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126401135] [2022-03-15 16:22:20,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:20,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:22:20,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:20,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:22:20,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:22:20,647 INFO L87 Difference]: Start difference. First operand 4322 states and 11789 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:42,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:42,832 INFO L93 Difference]: Finished difference Result 19425 states and 50281 transitions. [2022-03-15 16:22:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 406 states. [2022-03-15 16:22:42,833 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:22:42,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:42,859 INFO L225 Difference]: With dead ends: 19425 [2022-03-15 16:22:42,860 INFO L226 Difference]: Without dead ends: 18389 [2022-03-15 16:22:42,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 446 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88585 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=23496, Invalid=176760, Unknown=0, NotChecked=0, Total=200256 [2022-03-15 16:22:42,866 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 1365 mSDsluCounter, 4482 mSDsCounter, 0 mSdLazyCounter, 7768 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 2251 SdHoareTripleChecker+Invalid, 8521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 7768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:42,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1365 Valid, 2251 Invalid, 8521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 7768 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-15 16:22:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18389 states. [2022-03-15 16:22:43,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18389 to 5336. [2022-03-15 16:22:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5336 states, 5335 states have (on average 2.7321462043111526) internal successors, (14576), 5335 states have internal predecessors, (14576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5336 states to 5336 states and 14576 transitions. [2022-03-15 16:22:43,056 INFO L78 Accepts]: Start accepts. Automaton has 5336 states and 14576 transitions. Word has length 37 [2022-03-15 16:22:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:43,057 INFO L470 AbstractCegarLoop]: Abstraction has 5336 states and 14576 transitions. [2022-03-15 16:22:43,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 5336 states and 14576 transitions. [2022-03-15 16:22:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:22:43,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:43,066 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:43,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:43,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:43,291 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:22:43,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:43,292 INFO L85 PathProgramCache]: Analyzing trace with hash 730758682, now seen corresponding path program 17 times [2022-03-15 16:22:43,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:43,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857106387] [2022-03-15 16:22:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:43,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:22:43,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:43,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857106387] [2022-03-15 16:22:43,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857106387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:43,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391551954] [2022-03-15 16:22:43,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:22:43,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:43,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:43,549 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:43,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:22:43,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:22:43,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:43,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:22:43,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:44,007 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:22:44,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:22:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:44,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:44,442 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:22:44,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-15 16:22:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:44,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391551954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:44,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:44,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-15 16:22:44,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352643725] [2022-03-15 16:22:44,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:44,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:22:44,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:44,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:22:44,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:22:44,901 INFO L87 Difference]: Start difference. First operand 5336 states and 14576 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 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) [2022-03-15 16:23:07,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:07,499 INFO L93 Difference]: Finished difference Result 19470 states and 50048 transitions. [2022-03-15 16:23:07,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 420 states. [2022-03-15 16:23:07,500 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 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 37 [2022-03-15 16:23:07,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:07,526 INFO L225 Difference]: With dead ends: 19470 [2022-03-15 16:23:07,526 INFO L226 Difference]: Without dead ends: 17725 [2022-03-15 16:23:07,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99488 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=31398, Invalid=180662, Unknown=0, NotChecked=0, Total=212060 [2022-03-15 16:23:07,535 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1706 mSDsluCounter, 3325 mSDsCounter, 0 mSdLazyCounter, 5853 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1706 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 6657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 5853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:07,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1706 Valid, 1784 Invalid, 6657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 5853 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-15 16:23:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17725 states. [2022-03-15 16:23:07,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17725 to 6234. [2022-03-15 16:23:07,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6234 states, 6233 states have (on average 2.7328734156906784) internal successors, (17034), 6233 states have internal predecessors, (17034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:07,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6234 states to 6234 states and 17034 transitions. [2022-03-15 16:23:07,720 INFO L78 Accepts]: Start accepts. Automaton has 6234 states and 17034 transitions. Word has length 37 [2022-03-15 16:23:07,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:07,721 INFO L470 AbstractCegarLoop]: Abstraction has 6234 states and 17034 transitions. [2022-03-15 16:23:07,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 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) [2022-03-15 16:23:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand 6234 states and 17034 transitions. [2022-03-15 16:23:07,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:23:07,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:07,789 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:07,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:07,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:07,990 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:23:07,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:07,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1515417626, now seen corresponding path program 18 times [2022-03-15 16:23:07,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:07,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165587980] [2022-03-15 16:23:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:07,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:08,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:08,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165587980] [2022-03-15 16:23:08,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165587980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:08,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003281783] [2022-03-15 16:23:08,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:23:08,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:08,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:08,254 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:08,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:23:08,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:23:08,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:08,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:23:08,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:08,738 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:23:08,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:23:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:08,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:09,191 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:23:09,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-15 16:23:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:09,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003281783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:09,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:09,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-15 16:23:09,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601201163] [2022-03-15 16:23:09,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:09,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:23:09,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:09,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:23:09,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:23:09,664 INFO L87 Difference]: Start difference. First operand 6234 states and 17034 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 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) [2022-03-15 16:23:31,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:31,979 INFO L93 Difference]: Finished difference Result 31234 states and 81888 transitions. [2022-03-15 16:23:31,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 427 states. [2022-03-15 16:23:31,980 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 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 37 [2022-03-15 16:23:31,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:32,026 INFO L225 Difference]: With dead ends: 31234 [2022-03-15 16:23:32,027 INFO L226 Difference]: Without dead ends: 28790 [2022-03-15 16:23:32,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103084 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=29621, Invalid=188935, Unknown=0, NotChecked=0, Total=218556 [2022-03-15 16:23:32,034 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 2195 mSDsluCounter, 3630 mSDsCounter, 0 mSdLazyCounter, 6351 mSolverCounterSat, 1169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2195 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 7520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1169 IncrementalHoareTripleChecker+Valid, 6351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:32,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2195 Valid, 1918 Invalid, 7520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1169 Valid, 6351 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-15 16:23:32,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28790 states. [2022-03-15 16:23:32,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28790 to 9104. [2022-03-15 16:23:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9104 states, 9103 states have (on average 2.730748105020323) internal successors, (24858), 9103 states have internal predecessors, (24858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9104 states to 9104 states and 24858 transitions. [2022-03-15 16:23:32,280 INFO L78 Accepts]: Start accepts. Automaton has 9104 states and 24858 transitions. Word has length 37 [2022-03-15 16:23:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:32,281 INFO L470 AbstractCegarLoop]: Abstraction has 9104 states and 24858 transitions. [2022-03-15 16:23:32,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 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) [2022-03-15 16:23:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 9104 states and 24858 transitions. [2022-03-15 16:23:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:23:32,295 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:32,295 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:32,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:32,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:32,511 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:23:32,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:32,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1952777662, now seen corresponding path program 19 times [2022-03-15 16:23:32,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:32,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759254552] [2022-03-15 16:23:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:32,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:23:32,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:32,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759254552] [2022-03-15 16:23:32,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759254552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:32,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753886559] [2022-03-15 16:23:32,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:23:32,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:32,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:32,732 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:32,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:23:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:32,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:23:32,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:33,200 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:23:33,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:23:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:33,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:33,634 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:23:33,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-15 16:23:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:34,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753886559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:34,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:34,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-15 16:23:34,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912770920] [2022-03-15 16:23:34,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:34,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:23:34,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:34,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:23:34,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1634, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:23:34,220 INFO L87 Difference]: Start difference. First operand 9104 states and 24858 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:52,481 INFO L93 Difference]: Finished difference Result 32667 states and 86823 transitions. [2022-03-15 16:23:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 354 states. [2022-03-15 16:23:52,481 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:23:52,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:52,538 INFO L225 Difference]: With dead ends: 32667 [2022-03-15 16:23:52,538 INFO L226 Difference]: Without dead ends: 31087 [2022-03-15 16:23:52,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71981 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=22308, Invalid=132534, Unknown=0, NotChecked=0, Total=154842 [2022-03-15 16:23:52,545 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1751 mSDsluCounter, 4735 mSDsCounter, 0 mSdLazyCounter, 7318 mSolverCounterSat, 963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1751 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 8281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 7318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:52,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1751 Valid, 2646 Invalid, 8281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 7318 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-15 16:23:52,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31087 states. [2022-03-15 16:23:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31087 to 11836. [2022-03-15 16:23:52,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11836 states, 11835 states have (on average 2.7356991972961553) internal successors, (32377), 11835 states have internal predecessors, (32377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11836 states to 11836 states and 32377 transitions. [2022-03-15 16:23:52,906 INFO L78 Accepts]: Start accepts. Automaton has 11836 states and 32377 transitions. Word has length 37 [2022-03-15 16:23:52,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:52,906 INFO L470 AbstractCegarLoop]: Abstraction has 11836 states and 32377 transitions. [2022-03-15 16:23:52,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:52,907 INFO L276 IsEmpty]: Start isEmpty. Operand 11836 states and 32377 transitions. [2022-03-15 16:23:52,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:23:52,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:52,921 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:52,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:53,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:53,122 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:23:53,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:53,122 INFO L85 PathProgramCache]: Analyzing trace with hash 732190768, now seen corresponding path program 20 times [2022-03-15 16:23:53,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:53,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812607980] [2022-03-15 16:23:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:53,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:53,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:53,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812607980] [2022-03-15 16:23:53,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812607980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:53,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968936632] [2022-03-15 16:23:53,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:23:53,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:53,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:53,331 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:53,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:23:53,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:23:53,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:53,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:23:53,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:53,812 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:23:53,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:23:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:53,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:54,253 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:23:54,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-15 16:23:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:54,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968936632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:54,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:54,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-15 16:23:54,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363038051] [2022-03-15 16:23:54,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:54,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:23:54,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:54,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:23:54,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1722, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:23:54,764 INFO L87 Difference]: Start difference. First operand 11836 states and 32377 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 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) [2022-03-15 16:24:12,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:12,058 INFO L93 Difference]: Finished difference Result 33473 states and 89499 transitions. [2022-03-15 16:24:12,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 328 states. [2022-03-15 16:24:12,058 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 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 37 [2022-03-15 16:24:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:12,118 INFO L225 Difference]: With dead ends: 33473 [2022-03-15 16:24:12,118 INFO L226 Difference]: Without dead ends: 31834 [2022-03-15 16:24:12,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60160 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=20754, Invalid=115038, Unknown=0, NotChecked=0, Total=135792 [2022-03-15 16:24:12,122 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1317 mSDsluCounter, 2965 mSDsCounter, 0 mSdLazyCounter, 5366 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 6074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 5366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:12,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 1506 Invalid, 6074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 5366 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-15 16:24:12,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31834 states. [2022-03-15 16:24:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31834 to 12555. [2022-03-15 16:24:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12555 states, 12554 states have (on average 2.736498327226382) internal successors, (34354), 12554 states have internal predecessors, (34354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12555 states to 12555 states and 34354 transitions. [2022-03-15 16:24:12,438 INFO L78 Accepts]: Start accepts. Automaton has 12555 states and 34354 transitions. Word has length 37 [2022-03-15 16:24:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:12,438 INFO L470 AbstractCegarLoop]: Abstraction has 12555 states and 34354 transitions. [2022-03-15 16:24:12,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 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) [2022-03-15 16:24:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 12555 states and 34354 transitions. [2022-03-15 16:24:12,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:24:12,456 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:12,456 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:12,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:12,656 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,SelfDestructingSolverStorable22 [2022-03-15 16:24:12,657 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:24:12,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:12,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1932553214, now seen corresponding path program 21 times [2022-03-15 16:24:12,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:12,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165591453] [2022-03-15 16:24:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:12,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:24:12,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:12,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165591453] [2022-03-15 16:24:12,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165591453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:12,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387471229] [2022-03-15 16:24:12,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:24:12,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:12,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:12,855 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:12,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:24:12,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:24:12,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:12,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 16:24:12,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:13,317 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:24:13,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:24:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:13,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:13,847 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:24:13,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 39 treesize of output 103 [2022-03-15 16:24:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:14,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387471229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:14,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:14,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-15 16:24:14,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510656754] [2022-03-15 16:24:14,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:14,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:24:14,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:14,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:24:14,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:24:14,300 INFO L87 Difference]: Start difference. First operand 12555 states and 34354 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:29,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:29,279 INFO L93 Difference]: Finished difference Result 33192 states and 88992 transitions. [2022-03-15 16:24:29,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 282 states. [2022-03-15 16:24:29,279 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 16:24:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:29,337 INFO L225 Difference]: With dead ends: 33192 [2022-03-15 16:24:29,338 INFO L226 Difference]: Without dead ends: 31790 [2022-03-15 16:24:29,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43653 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=16321, Invalid=87041, Unknown=0, NotChecked=0, Total=103362 [2022-03-15 16:24:29,342 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 1114 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 5203 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 5820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 5203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:29,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 1794 Invalid, 5820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 5203 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-15 16:24:29,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31790 states. [2022-03-15 16:24:29,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31790 to 13207. [2022-03-15 16:24:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13207 states, 13206 states have (on average 2.7397395123428745) internal successors, (36181), 13206 states have internal predecessors, (36181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:29,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13207 states to 13207 states and 36181 transitions. [2022-03-15 16:24:29,681 INFO L78 Accepts]: Start accepts. Automaton has 13207 states and 36181 transitions. Word has length 37 [2022-03-15 16:24:29,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:29,681 INFO L470 AbstractCegarLoop]: Abstraction has 13207 states and 36181 transitions. [2022-03-15 16:24:29,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 13207 states and 36181 transitions. [2022-03-15 16:24:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:24:29,695 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:29,695 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:29,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:29,895 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,SelfDestructingSolverStorable23 [2022-03-15 16:24:29,896 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:24:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:29,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1784070594, now seen corresponding path program 22 times [2022-03-15 16:24:29,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:29,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521979282] [2022-03-15 16:24:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:29,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:30,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:30,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521979282] [2022-03-15 16:24:30,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521979282] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:30,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943797321] [2022-03-15 16:24:30,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:24:30,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:30,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:30,110 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:30,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:24:30,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:24:30,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:30,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:24:30,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:30,577 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:24:30,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:24:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:30,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:31,028 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:24:31,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-15 16:24:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:31,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943797321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:31,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:31,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:24:31,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444847327] [2022-03-15 16:24:31,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:31,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:24:31,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:31,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:24:31,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1782, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:24:31,506 INFO L87 Difference]: Start difference. First operand 13207 states and 36181 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:41,456 INFO L93 Difference]: Finished difference Result 27912 states and 74844 transitions. [2022-03-15 16:24:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2022-03-15 16:24:41,457 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:24:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:41,505 INFO L225 Difference]: With dead ends: 27912 [2022-03-15 16:24:41,506 INFO L226 Difference]: Without dead ends: 27500 [2022-03-15 16:24:41,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22323 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=8313, Invalid=50009, Unknown=0, NotChecked=0, Total=58322 [2022-03-15 16:24:41,508 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 1123 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 3131 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 3582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 3131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:41,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1123 Valid, 536 Invalid, 3582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 3131 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 16:24:41,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27500 states. [2022-03-15 16:24:41,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27500 to 13985. [2022-03-15 16:24:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13985 states, 13984 states have (on average 2.7281893592677346) internal successors, (38151), 13984 states have internal predecessors, (38151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:41,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13985 states to 13985 states and 38151 transitions. [2022-03-15 16:24:41,777 INFO L78 Accepts]: Start accepts. Automaton has 13985 states and 38151 transitions. Word has length 37 [2022-03-15 16:24:41,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:41,777 INFO L470 AbstractCegarLoop]: Abstraction has 13985 states and 38151 transitions. [2022-03-15 16:24:41,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:41,777 INFO L276 IsEmpty]: Start isEmpty. Operand 13985 states and 38151 transitions. [2022-03-15 16:24:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:24:41,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:41,792 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:41,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:41,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:41,993 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:24:41,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:41,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1519528804, now seen corresponding path program 23 times [2022-03-15 16:24:41,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:41,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672239731] [2022-03-15 16:24:41,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:41,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:42,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:42,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672239731] [2022-03-15 16:24:42,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672239731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:42,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475531002] [2022-03-15 16:24:42,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:24:42,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:42,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:42,215 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:42,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:24:42,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:24:42,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:42,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:24:42,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:42,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:42,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:42,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:42,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:42,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:42,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:24:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:42,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:43,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:43,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:43,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:43,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:43,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:43,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:43,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:43,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:24:43,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 98 [2022-03-15 16:24:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:43,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475531002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:43,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:43,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:24:43,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330345189] [2022-03-15 16:24:43,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:43,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:24:43,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:43,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:24:43,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1785, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:24:43,713 INFO L87 Difference]: Start difference. First operand 13985 states and 38151 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2022-03-15 16:24:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:58,036 INFO L93 Difference]: Finished difference Result 32196 states and 85016 transitions. [2022-03-15 16:24:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-03-15 16:24:58,037 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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 37 [2022-03-15 16:24:58,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:58,094 INFO L225 Difference]: With dead ends: 32196 [2022-03-15 16:24:58,095 INFO L226 Difference]: Without dead ends: 30842 [2022-03-15 16:24:58,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39555 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=13928, Invalid=77578, Unknown=0, NotChecked=0, Total=91506 [2022-03-15 16:24:58,098 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1177 mSDsluCounter, 3531 mSDsCounter, 0 mSdLazyCounter, 4436 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 5681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 4436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 620 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:58,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 1987 Invalid, 5681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 4436 Invalid, 0 Unknown, 620 Unchecked, 2.2s Time] [2022-03-15 16:24:58,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30842 states. [2022-03-15 16:24:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30842 to 14560. [2022-03-15 16:24:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14560 states, 14559 states have (on average 2.7218215536781374) internal successors, (39627), 14559 states have internal predecessors, (39627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14560 states to 14560 states and 39627 transitions. [2022-03-15 16:24:58,428 INFO L78 Accepts]: Start accepts. Automaton has 14560 states and 39627 transitions. Word has length 37 [2022-03-15 16:24:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:58,428 INFO L470 AbstractCegarLoop]: Abstraction has 14560 states and 39627 transitions. [2022-03-15 16:24:58,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2022-03-15 16:24:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 14560 states and 39627 transitions. [2022-03-15 16:24:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:24:58,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:58,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:58,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:58,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:58,645 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:24:58,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:58,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1684148304, now seen corresponding path program 24 times [2022-03-15 16:24:58,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:58,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594593461] [2022-03-15 16:24:58,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:58,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:24:58,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:58,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594593461] [2022-03-15 16:24:58,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594593461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:58,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021334536] [2022-03-15 16:24:58,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:24:58,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:58,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:58,832 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:58,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:24:58,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:24:58,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:58,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:24:58,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:59,345 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:24:59,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:24:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:59,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:59,780 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:24:59,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-15 16:25:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:00,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021334536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:00,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:00,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-15 16:25:00,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274384880] [2022-03-15 16:25:00,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:00,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:25:00,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:00,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:25:00,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:25:00,158 INFO L87 Difference]: Start difference. First operand 14560 states and 39627 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 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) [2022-03-15 16:25:13,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:13,020 INFO L93 Difference]: Finished difference Result 31171 states and 82882 transitions. [2022-03-15 16:25:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2022-03-15 16:25:13,020 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 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 37 [2022-03-15 16:25:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:13,085 INFO L225 Difference]: With dead ends: 31171 [2022-03-15 16:25:13,085 INFO L226 Difference]: Without dead ends: 30819 [2022-03-15 16:25:13,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32626 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=11529, Invalid=68277, Unknown=0, NotChecked=0, Total=79806 [2022-03-15 16:25:13,091 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1218 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 3424 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 4018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 3424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:13,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 754 Invalid, 4018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 3424 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-15 16:25:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30819 states. [2022-03-15 16:25:13,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30819 to 15192. [2022-03-15 16:25:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15192 states, 15191 states have (on average 2.7192416562438284) internal successors, (41308), 15191 states have internal predecessors, (41308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:13,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15192 states to 15192 states and 41308 transitions. [2022-03-15 16:25:13,460 INFO L78 Accepts]: Start accepts. Automaton has 15192 states and 41308 transitions. Word has length 37 [2022-03-15 16:25:13,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:13,460 INFO L470 AbstractCegarLoop]: Abstraction has 15192 states and 41308 transitions. [2022-03-15 16:25:13,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 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) [2022-03-15 16:25:13,461 INFO L276 IsEmpty]: Start isEmpty. Operand 15192 states and 41308 transitions. [2022-03-15 16:25:13,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:25:13,482 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:13,482 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:13,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 16:25:13,687 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,SelfDestructingSolverStorable26 [2022-03-15 16:25:13,687 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:25:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:13,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2066976134, now seen corresponding path program 25 times [2022-03-15 16:25:13,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:13,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949725903] [2022-03-15 16:25:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:13,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:25:13,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:13,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949725903] [2022-03-15 16:25:13,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949725903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:13,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482555689] [2022-03-15 16:25:13,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:25:13,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:13,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:13,904 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:25:13,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:25:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:13,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:25:13,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:14,356 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:25:14,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:25:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:14,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:14,793 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:25:14,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-15 16:25:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:15,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482555689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:15,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:15,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-15 16:25:15,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479588589] [2022-03-15 16:25:15,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:15,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:25:15,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:25:15,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1620, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:25:15,257 INFO L87 Difference]: Start difference. First operand 15192 states and 41308 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:30,574 INFO L93 Difference]: Finished difference Result 40939 states and 109794 transitions. [2022-03-15 16:25:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2022-03-15 16:25:30,575 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:25:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:30,651 INFO L225 Difference]: With dead ends: 40939 [2022-03-15 16:25:30,651 INFO L226 Difference]: Without dead ends: 39453 [2022-03-15 16:25:30,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49162 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=16678, Invalid=95212, Unknown=0, NotChecked=0, Total=111890 [2022-03-15 16:25:30,655 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 1246 mSDsluCounter, 3589 mSDsCounter, 0 mSdLazyCounter, 5130 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 5763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 5130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:30,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 2049 Invalid, 5763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 5130 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-15 16:25:30,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39453 states. [2022-03-15 16:25:31,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39453 to 16120. [2022-03-15 16:25:31,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16120 states, 16119 states have (on average 2.7244866306842854) internal successors, (43916), 16119 states have internal predecessors, (43916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16120 states to 16120 states and 43916 transitions. [2022-03-15 16:25:31,061 INFO L78 Accepts]: Start accepts. Automaton has 16120 states and 43916 transitions. Word has length 37 [2022-03-15 16:25:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:31,061 INFO L470 AbstractCegarLoop]: Abstraction has 16120 states and 43916 transitions. [2022-03-15 16:25:31,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 16120 states and 43916 transitions. [2022-03-15 16:25:31,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:25:31,085 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:31,085 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:31,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 16:25:31,306 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,SelfDestructingSolverStorable27 [2022-03-15 16:25:31,306 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:25:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:31,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1940938686, now seen corresponding path program 26 times [2022-03-15 16:25:31,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:31,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670548419] [2022-03-15 16:25:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:31,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:31,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:31,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670548419] [2022-03-15 16:25:31,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670548419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:31,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072764245] [2022-03-15 16:25:31,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:25:31,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:31,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:31,575 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:25:31,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:25:31,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:25:31,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:25:31,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:25:31,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:32,192 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:25:32,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:25:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:32,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:32,636 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:25:32,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-15 16:25:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:33,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072764245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:33,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:33,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:25:33,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337116254] [2022-03-15 16:25:33,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:33,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:25:33,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:33,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:25:33,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1775, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:25:33,189 INFO L87 Difference]: Start difference. First operand 16120 states and 43916 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2022-03-15 16:25:46,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:46,800 INFO L93 Difference]: Finished difference Result 35540 states and 95539 transitions. [2022-03-15 16:25:46,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-03-15 16:25:46,800 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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 37 [2022-03-15 16:25:46,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:46,871 INFO L225 Difference]: With dead ends: 35540 [2022-03-15 16:25:46,871 INFO L226 Difference]: Without dead ends: 34093 [2022-03-15 16:25:46,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36899 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=12408, Invalid=78494, Unknown=0, NotChecked=0, Total=90902 [2022-03-15 16:25:46,875 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 1217 mSDsluCounter, 2491 mSDsCounter, 0 mSdLazyCounter, 4786 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 5268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 4786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:46,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 1248 Invalid, 5268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 4786 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-15 16:25:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34093 states. [2022-03-15 16:25:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34093 to 17528. [2022-03-15 16:25:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17528 states, 17527 states have (on average 2.7226564728704283) internal successors, (47720), 17527 states have internal predecessors, (47720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:47,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17528 states to 17528 states and 47720 transitions. [2022-03-15 16:25:47,271 INFO L78 Accepts]: Start accepts. Automaton has 17528 states and 47720 transitions. Word has length 37 [2022-03-15 16:25:47,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:47,271 INFO L470 AbstractCegarLoop]: Abstraction has 17528 states and 47720 transitions. [2022-03-15 16:25:47,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2022-03-15 16:25:47,271 INFO L276 IsEmpty]: Start isEmpty. Operand 17528 states and 47720 transitions. [2022-03-15 16:25:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:25:47,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:47,293 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:47,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-15 16:25:47,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 16:25:47,493 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:25:47,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:47,494 INFO L85 PathProgramCache]: Analyzing trace with hash 949570788, now seen corresponding path program 27 times [2022-03-15 16:25:47,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:47,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259853826] [2022-03-15 16:25:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:47,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:47,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:47,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259853826] [2022-03-15 16:25:47,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259853826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:47,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158111570] [2022-03-15 16:25:47,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:25:47,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:47,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:47,759 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:25:47,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:25:47,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:25:47,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:25:47,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 16:25:47,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:48,248 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:25:48,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:25:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:48,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:48,765 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:25:48,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 39 treesize of output 103 [2022-03-15 16:25:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:49,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158111570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:49,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:49,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:25:49,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310858883] [2022-03-15 16:25:49,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:49,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:25:49,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:49,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:25:49,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1793, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:25:49,326 INFO L87 Difference]: Start difference. First operand 17528 states and 47720 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2022-03-15 16:26:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:02,214 INFO L93 Difference]: Finished difference Result 36001 states and 97032 transitions. [2022-03-15 16:26:02,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2022-03-15 16:26:02,214 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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 37 [2022-03-15 16:26:02,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:02,283 INFO L225 Difference]: With dead ends: 36001 [2022-03-15 16:26:02,283 INFO L226 Difference]: Without dead ends: 35103 [2022-03-15 16:26:02,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28391 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=11364, Invalid=62348, Unknown=0, NotChecked=0, Total=73712 [2022-03-15 16:26:02,288 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1001 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 4003 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 4003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:02,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 875 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 4003 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-15 16:26:02,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35103 states. [2022-03-15 16:26:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35103 to 18000. [2022-03-15 16:26:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18000 states, 17999 states have (on average 2.716039779987777) internal successors, (48886), 17999 states have internal predecessors, (48886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18000 states to 18000 states and 48886 transitions. [2022-03-15 16:26:02,717 INFO L78 Accepts]: Start accepts. Automaton has 18000 states and 48886 transitions. Word has length 37 [2022-03-15 16:26:02,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:02,717 INFO L470 AbstractCegarLoop]: Abstraction has 18000 states and 48886 transitions. [2022-03-15 16:26:02,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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) [2022-03-15 16:26:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 18000 states and 48886 transitions. [2022-03-15 16:26:02,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:26:02,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:02,738 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:02,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 16:26:02,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:02,939 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:26:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1131314986, now seen corresponding path program 28 times [2022-03-15 16:26:02,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:02,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40448401] [2022-03-15 16:26:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:02,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:26:03,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:03,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40448401] [2022-03-15 16:26:03,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40448401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:03,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8035660] [2022-03-15 16:26:03,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:26:03,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:03,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:03,127 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:26:03,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:26:03,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:26:03,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:26:03,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:26:03,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:03,577 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:26:03,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:26:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:03,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:04,017 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:26:04,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-03-15 16:26:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:04,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8035660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:04,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:04,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-15 16:26:04,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179646095] [2022-03-15 16:26:04,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:04,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:26:04,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:04,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:26:04,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:26:04,468 INFO L87 Difference]: Start difference. First operand 18000 states and 48886 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:23,935 INFO L93 Difference]: Finished difference Result 47599 states and 127744 transitions. [2022-03-15 16:26:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 339 states. [2022-03-15 16:26:23,935 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:26:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:24,028 INFO L225 Difference]: With dead ends: 47599 [2022-03-15 16:26:24,028 INFO L226 Difference]: Without dead ends: 46244 [2022-03-15 16:26:24,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 378 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62634 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=20490, Invalid=123530, Unknown=0, NotChecked=0, Total=144020 [2022-03-15 16:26:24,034 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1306 mSDsluCounter, 2948 mSDsCounter, 0 mSdLazyCounter, 6007 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 6623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 6007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:24,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1306 Valid, 1489 Invalid, 6623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 6007 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-15 16:26:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46244 states. [2022-03-15 16:26:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46244 to 20798. [2022-03-15 16:26:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20798 states, 20797 states have (on average 2.712747030821753) internal successors, (56417), 20797 states have internal predecessors, (56417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:24,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20798 states to 20798 states and 56417 transitions. [2022-03-15 16:26:24,607 INFO L78 Accepts]: Start accepts. Automaton has 20798 states and 56417 transitions. Word has length 37 [2022-03-15 16:26:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:24,607 INFO L470 AbstractCegarLoop]: Abstraction has 20798 states and 56417 transitions. [2022-03-15 16:26:24,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:24,608 INFO L276 IsEmpty]: Start isEmpty. Operand 20798 states and 56417 transitions. [2022-03-15 16:26:24,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:26:24,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:24,632 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:24,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 16:26:24,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:24,844 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:26:24,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:24,845 INFO L85 PathProgramCache]: Analyzing trace with hash -346656042, now seen corresponding path program 29 times [2022-03-15 16:26:24,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:24,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246698626] [2022-03-15 16:26:24,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:24,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:26:25,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:25,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246698626] [2022-03-15 16:26:25,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246698626] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:25,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294995196] [2022-03-15 16:26:25,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:26:25,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:25,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:25,084 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:26:25,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:26:25,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:26:25,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:26:25,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:26:25,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:25,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:25,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:25,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-03-15 16:26:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:25,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:26,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:26:26,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 98 [2022-03-15 16:26:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:26,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294995196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:26,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:26,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-15 16:26:26,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804069436] [2022-03-15 16:26:26,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:26,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:26:26,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:26,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:26:26,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1717, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:26:26,662 INFO L87 Difference]: Start difference. First operand 20798 states and 56417 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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) [2022-03-15 16:26:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:44,380 INFO L93 Difference]: Finished difference Result 54650 states and 147257 transitions. [2022-03-15 16:26:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2022-03-15 16:26:44,380 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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 37 [2022-03-15 16:26:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:44,503 INFO L225 Difference]: With dead ends: 54650 [2022-03-15 16:26:44,503 INFO L226 Difference]: Without dead ends: 53564 [2022-03-15 16:26:44,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 364 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59804 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=19529, Invalid=114061, Unknown=0, NotChecked=0, Total=133590 [2022-03-15 16:26:44,508 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1205 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 4671 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 5926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 4671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 666 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:44,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1691 Invalid, 5926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 4671 Invalid, 0 Unknown, 666 Unchecked, 2.5s Time] [2022-03-15 16:26:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53564 states. [2022-03-15 16:26:45,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53564 to 22756. [2022-03-15 16:26:45,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22756 states, 22755 states have (on average 2.711008569545155) internal successors, (61689), 22755 states have internal predecessors, (61689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22756 states to 22756 states and 61689 transitions. [2022-03-15 16:26:45,214 INFO L78 Accepts]: Start accepts. Automaton has 22756 states and 61689 transitions. Word has length 37 [2022-03-15 16:26:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:45,214 INFO L470 AbstractCegarLoop]: Abstraction has 22756 states and 61689 transitions. [2022-03-15 16:26:45,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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) [2022-03-15 16:26:45,214 INFO L276 IsEmpty]: Start isEmpty. Operand 22756 states and 61689 transitions. [2022-03-15 16:26:45,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-15 16:26:45,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:45,244 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:45,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-15 16:26:45,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:45,459 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:26:45,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:45,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2073145783, now seen corresponding path program 30 times [2022-03-15 16:26:45,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:45,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710393384] [2022-03-15 16:26:45,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:45,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:45,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:45,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710393384] [2022-03-15 16:26:45,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710393384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:45,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333983936] [2022-03-15 16:26:45,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:26:45,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:45,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:45,495 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:26:45,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:26:45,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:26:45,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:26:45,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 16:26:45,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:45,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:45,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333983936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:45,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:45,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-15 16:26:45,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246237458] [2022-03-15 16:26:45,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:45,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:26:45,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:45,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:26:45,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:26:45,655 INFO L87 Difference]: Start difference. First operand 22756 states and 61689 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:45,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:45,781 INFO L93 Difference]: Finished difference Result 30249 states and 82841 transitions. [2022-03-15 16:26:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:26:45,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-15 16:26:45,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:45,841 INFO L225 Difference]: With dead ends: 30249 [2022-03-15 16:26:45,841 INFO L226 Difference]: Without dead ends: 30177 [2022-03-15 16:26:45,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:26:45,841 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 83 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:45,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 110 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:26:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30177 states. [2022-03-15 16:26:46,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30177 to 29234. [2022-03-15 16:26:46,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29234 states, 29233 states have (on average 2.7446721171279034) internal successors, (80235), 29233 states have internal predecessors, (80235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29234 states to 29234 states and 80235 transitions. [2022-03-15 16:26:46,667 INFO L78 Accepts]: Start accepts. Automaton has 29234 states and 80235 transitions. Word has length 40 [2022-03-15 16:26:46,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:46,667 INFO L470 AbstractCegarLoop]: Abstraction has 29234 states and 80235 transitions. [2022-03-15 16:26:46,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 29234 states and 80235 transitions. [2022-03-15 16:26:46,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:26:46,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:46,722 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:46,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 16:26:46,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-15 16:26:46,923 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:26:46,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:46,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1650713771, now seen corresponding path program 31 times [2022-03-15 16:26:46,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:46,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143645227] [2022-03-15 16:26:46,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:46,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:47,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:47,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143645227] [2022-03-15 16:26:47,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143645227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:47,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393261105] [2022-03-15 16:26:47,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:26:47,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:47,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:47,460 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:26:47,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:26:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:47,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:26:47,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:48,241 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 16:26:48,242 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 50 treesize of output 22 [2022-03-15 16:26:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:48,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:48,975 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:26:48,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-03-15 16:26:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:50,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393261105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:50,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:50,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-15 16:26:50,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359766690] [2022-03-15 16:26:50,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:50,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-15 16:26:50,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:50,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-15 16:26:50,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2904, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:26:50,672 INFO L87 Difference]: Start difference. First operand 29234 states and 80235 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:11,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:11,229 INFO L93 Difference]: Finished difference Result 44200 states and 117713 transitions. [2022-03-15 16:27:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 339 states. [2022-03-15 16:27:11,230 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:27:11,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:11,303 INFO L225 Difference]: With dead ends: 44200 [2022-03-15 16:27:11,303 INFO L226 Difference]: Without dead ends: 42253 [2022-03-15 16:27:11,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64716 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=21746, Invalid=132310, Unknown=0, NotChecked=0, Total=154056 [2022-03-15 16:27:11,308 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 2342 mSDsluCounter, 4675 mSDsCounter, 0 mSdLazyCounter, 8694 mSolverCounterSat, 893 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2342 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 9587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 893 IncrementalHoareTripleChecker+Valid, 8694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:11,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2342 Valid, 2391 Invalid, 9587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [893 Valid, 8694 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-15 16:27:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42253 states. [2022-03-15 16:27:11,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42253 to 30116. [2022-03-15 16:27:11,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30116 states, 30115 states have (on average 2.74394819857214) internal successors, (82634), 30115 states have internal predecessors, (82634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30116 states to 30116 states and 82634 transitions. [2022-03-15 16:27:11,929 INFO L78 Accepts]: Start accepts. Automaton has 30116 states and 82634 transitions. Word has length 43 [2022-03-15 16:27:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:11,929 INFO L470 AbstractCegarLoop]: Abstraction has 30116 states and 82634 transitions. [2022-03-15 16:27:11,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 30116 states and 82634 transitions. [2022-03-15 16:27:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:27:11,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:11,971 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:11,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-15 16:27:12,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:12,172 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:27:12,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1112247061, now seen corresponding path program 32 times [2022-03-15 16:27:12,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:12,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360750513] [2022-03-15 16:27:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:12,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:12,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:12,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360750513] [2022-03-15 16:27:12,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360750513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:12,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245109172] [2022-03-15 16:27:12,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:27:12,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:12,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:12,578 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:27:12,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:27:12,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:27:12,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:27:12,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:27:12,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:13,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:13,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:13,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:13,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:13,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:13,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:13,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:13,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:13,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2022-03-15 16:27:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:13,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:14,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:14,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:27:14,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 49 treesize of output 153 [2022-03-15 16:27:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:15,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245109172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:27:15,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:27:15,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-15 16:27:15,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558247246] [2022-03-15 16:27:15,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:27:15,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-15 16:27:15,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:27:15,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-15 16:27:15,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=2802, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:27:15,652 INFO L87 Difference]: Start difference. First operand 30116 states and 82634 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:30,092 INFO L93 Difference]: Finished difference Result 42109 states and 115194 transitions. [2022-03-15 16:27:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2022-03-15 16:27:30,092 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:27:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:30,174 INFO L225 Difference]: With dead ends: 42109 [2022-03-15 16:27:30,174 INFO L226 Difference]: Without dead ends: 42066 [2022-03-15 16:27:30,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 96 SyntacticMatches, 28 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30717 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=9279, Invalid=60153, Unknown=0, NotChecked=0, Total=69432 [2022-03-15 16:27:30,177 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 633 mSDsluCounter, 2958 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 5953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4978 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:30,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1035 Invalid, 5953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 897 Invalid, 0 Unknown, 4978 Unchecked, 0.4s Time] [2022-03-15 16:27:30,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42066 states. [2022-03-15 16:27:30,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42066 to 30630. [2022-03-15 16:27:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30630 states, 30629 states have (on average 2.743151914851938) internal successors, (84020), 30629 states have internal predecessors, (84020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30630 states to 30630 states and 84020 transitions. [2022-03-15 16:27:30,834 INFO L78 Accepts]: Start accepts. Automaton has 30630 states and 84020 transitions. Word has length 43 [2022-03-15 16:27:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:30,834 INFO L470 AbstractCegarLoop]: Abstraction has 30630 states and 84020 transitions. [2022-03-15 16:27:30,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 30630 states and 84020 transitions. [2022-03-15 16:27:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:27:30,879 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:30,879 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:30,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 16:27:31,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:31,080 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:27:31,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:31,080 INFO L85 PathProgramCache]: Analyzing trace with hash -129342371, now seen corresponding path program 33 times [2022-03-15 16:27:31,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:31,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545997367] [2022-03-15 16:27:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:31,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:31,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:31,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545997367] [2022-03-15 16:27:31,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545997367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:31,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341034307] [2022-03-15 16:27:31,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:27:31,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:31,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:31,568 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:27:31,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:27:31,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:27:31,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:27:31,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 16:27:31,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:32,361 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 16:27:32,361 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 50 treesize of output 22 [2022-03-15 16:27:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:32,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:33,164 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:27:33,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 52 treesize of output 176 [2022-03-15 16:27:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:35,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341034307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:27:35,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:27:35,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-15 16:27:35,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960654334] [2022-03-15 16:27:35,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:27:35,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-15 16:27:35,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:27:35,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-15 16:27:35,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2914, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:27:35,118 INFO L87 Difference]: Start difference. First operand 30630 states and 84020 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:18,052 INFO L93 Difference]: Finished difference Result 55936 states and 147102 transitions. [2022-03-15 16:28:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 596 states. [2022-03-15 16:28:18,052 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:28:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:18,174 INFO L225 Difference]: With dead ends: 55936 [2022-03-15 16:28:18,175 INFO L226 Difference]: Without dead ends: 53473 [2022-03-15 16:28:18,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 648 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189462 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=52090, Invalid=369760, Unknown=0, NotChecked=0, Total=421850 [2022-03-15 16:28:18,191 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1682 mSDsluCounter, 6005 mSDsCounter, 0 mSdLazyCounter, 12509 mSolverCounterSat, 924 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 2727 SdHoareTripleChecker+Invalid, 13433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 924 IncrementalHoareTripleChecker+Valid, 12509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:18,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 2727 Invalid, 13433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [924 Valid, 12509 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-03-15 16:28:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53473 states. [2022-03-15 16:28:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53473 to 30690. [2022-03-15 16:28:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30690 states, 30689 states have (on average 2.7449248916549904) internal successors, (84239), 30689 states have internal predecessors, (84239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30690 states to 30690 states and 84239 transitions. [2022-03-15 16:28:19,066 INFO L78 Accepts]: Start accepts. Automaton has 30690 states and 84239 transitions. Word has length 43 [2022-03-15 16:28:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:19,066 INFO L470 AbstractCegarLoop]: Abstraction has 30690 states and 84239 transitions. [2022-03-15 16:28:19,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 30690 states and 84239 transitions. [2022-03-15 16:28:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:28:19,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:19,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:19,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-15 16:28:19,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-15 16:28:19,309 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:28:19,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:19,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2103614959, now seen corresponding path program 34 times [2022-03-15 16:28:19,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:19,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142384635] [2022-03-15 16:28:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:19,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:19,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:19,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142384635] [2022-03-15 16:28:19,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142384635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:19,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440646966] [2022-03-15 16:28:19,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:28:19,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:19,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:19,710 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:28:19,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:28:19,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:28:19,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:28:19,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:28:19,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:20,512 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 16:28:20,513 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 50 treesize of output 22 [2022-03-15 16:28:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:20,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:21,512 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:28:21,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-03-15 16:28:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:23,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440646966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:23,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:23,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-15 16:28:23,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421936731] [2022-03-15 16:28:23,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:23,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-15 16:28:23,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:23,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-15 16:28:23,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=2922, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:28:23,260 INFO L87 Difference]: Start difference. First operand 30690 states and 84239 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:07,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:29:07,650 INFO L93 Difference]: Finished difference Result 58865 states and 154985 transitions. [2022-03-15 16:29:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 628 states. [2022-03-15 16:29:07,651 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:29:07,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:29:07,776 INFO L225 Difference]: With dead ends: 58865 [2022-03-15 16:29:07,777 INFO L226 Difference]: Without dead ends: 56451 [2022-03-15 16:29:07,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 680 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210674 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=53546, Invalid=410896, Unknown=0, NotChecked=0, Total=464442 [2022-03-15 16:29:07,796 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1732 mSDsluCounter, 5833 mSDsCounter, 0 mSdLazyCounter, 11059 mSolverCounterSat, 1021 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1732 SdHoareTripleChecker+Valid, 2854 SdHoareTripleChecker+Invalid, 12080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1021 IncrementalHoareTripleChecker+Valid, 11059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:29:07,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1732 Valid, 2854 Invalid, 12080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1021 Valid, 11059 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-03-15 16:29:07,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56451 states. [2022-03-15 16:29:08,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56451 to 31926. [2022-03-15 16:29:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31926 states, 31925 states have (on average 2.74894283476899) internal successors, (87760), 31925 states have internal predecessors, (87760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31926 states to 31926 states and 87760 transitions. [2022-03-15 16:29:08,732 INFO L78 Accepts]: Start accepts. Automaton has 31926 states and 87760 transitions. Word has length 43 [2022-03-15 16:29:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:29:08,732 INFO L470 AbstractCegarLoop]: Abstraction has 31926 states and 87760 transitions. [2022-03-15 16:29:08,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 31926 states and 87760 transitions. [2022-03-15 16:29:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:29:08,900 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:29:08,900 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:29:08,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 16:29:09,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 16:29:09,115 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:29:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:29:09,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1987652953, now seen corresponding path program 35 times [2022-03-15 16:29:09,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:29:09,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321001238] [2022-03-15 16:29:09,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:29:09,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:29:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:29:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:09,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:29:09,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321001238] [2022-03-15 16:29:09,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321001238] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:29:09,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206716714] [2022-03-15 16:29:09,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:29:09,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:09,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:29:09,530 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:29:09,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:29:09,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:29:09,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:29:09,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:29:09,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:29:10,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:10,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:10,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:10,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:10,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:10,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:10,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:10,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:10,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:10,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:10,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:10,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:10,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:10,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:10,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:10,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:10,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 22 [2022-03-15 16:29:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:10,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:29:11,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:11,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:29:11,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 129 [2022-03-15 16:29:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:12,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206716714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:29:12,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:29:12,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-15 16:29:12,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915379983] [2022-03-15 16:29:12,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:29:12,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-15 16:29:12,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:29:12,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-15 16:29:12,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:29:12,214 INFO L87 Difference]: Start difference. First operand 31926 states and 87760 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:55,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:29:55,821 INFO L93 Difference]: Finished difference Result 109906 states and 296717 transitions. [2022-03-15 16:29:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 575 states. [2022-03-15 16:29:55,821 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:29:55,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:29:56,156 INFO L225 Difference]: With dead ends: 109906 [2022-03-15 16:29:56,156 INFO L226 Difference]: Without dead ends: 108076 [2022-03-15 16:29:56,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 149 SyntacticMatches, 54 SemanticMatches, 616 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 194353 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=50892, Invalid=330414, Unknown=0, NotChecked=0, Total=381306 [2022-03-15 16:29:56,175 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1729 mSDsluCounter, 9182 mSDsCounter, 0 mSdLazyCounter, 6348 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1729 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 24523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 6348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17424 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:29:56,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1729 Valid, 2953 Invalid, 24523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 6348 Invalid, 0 Unknown, 17424 Unchecked, 3.1s Time] [2022-03-15 16:29:56,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108076 states. [2022-03-15 16:29:57,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108076 to 39267. [2022-03-15 16:29:57,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39267 states, 39266 states have (on average 2.752355727601487) internal successors, (108074), 39266 states have internal predecessors, (108074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39267 states to 39267 states and 108074 transitions. [2022-03-15 16:29:57,851 INFO L78 Accepts]: Start accepts. Automaton has 39267 states and 108074 transitions. Word has length 43 [2022-03-15 16:29:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:29:57,851 INFO L470 AbstractCegarLoop]: Abstraction has 39267 states and 108074 transitions. [2022-03-15 16:29:57,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 39267 states and 108074 transitions. [2022-03-15 16:29:57,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:29:57,908 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:29:57,908 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:29:57,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 16:29:58,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-15 16:29:58,109 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:29:58,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:29:58,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1298369877, now seen corresponding path program 36 times [2022-03-15 16:29:58,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:29:58,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003234688] [2022-03-15 16:29:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:29:58,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:29:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:29:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:58,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:29:58,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003234688] [2022-03-15 16:29:58,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003234688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:29:58,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278241351] [2022-03-15 16:29:58,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:29:58,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:58,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:29:58,526 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:29:58,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:29:58,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:29:58,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:29:58,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:29:58,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:29:59,320 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 16:29:59,321 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 50 treesize of output 22 [2022-03-15 16:29:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:59,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:30:00,080 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:30:00,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-03-15 16:30:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:01,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278241351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:30:01,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:30:01,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-15 16:30:01,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209142962] [2022-03-15 16:30:01,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:30:01,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-15 16:30:01,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:30:01,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-15 16:30:01,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2915, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:30:01,938 INFO L87 Difference]: Start difference. First operand 39267 states and 108074 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:30:45,252 INFO L93 Difference]: Finished difference Result 77276 states and 205583 transitions. [2022-03-15 16:30:45,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 609 states. [2022-03-15 16:30:45,253 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:30:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:30:45,426 INFO L225 Difference]: With dead ends: 77276 [2022-03-15 16:30:45,426 INFO L226 Difference]: Without dead ends: 73306 [2022-03-15 16:30:45,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 661 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204061 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=56273, Invalid=382633, Unknown=0, NotChecked=0, Total=438906 [2022-03-15 16:30:45,442 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 2233 mSDsluCounter, 5723 mSDsCounter, 0 mSdLazyCounter, 11275 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2233 SdHoareTripleChecker+Valid, 2675 SdHoareTripleChecker+Invalid, 12368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 11275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:30:45,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2233 Valid, 2675 Invalid, 12368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1093 Valid, 11275 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-03-15 16:30:45,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73306 states. [2022-03-15 16:30:46,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73306 to 39944. [2022-03-15 16:30:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39944 states, 39943 states have (on average 2.7510202037904015) internal successors, (109884), 39943 states have internal predecessors, (109884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39944 states to 39944 states and 109884 transitions. [2022-03-15 16:30:46,543 INFO L78 Accepts]: Start accepts. Automaton has 39944 states and 109884 transitions. Word has length 43 [2022-03-15 16:30:46,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:30:46,543 INFO L470 AbstractCegarLoop]: Abstraction has 39944 states and 109884 transitions. [2022-03-15 16:30:46,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 39944 states and 109884 transitions. [2022-03-15 16:30:46,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:30:46,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:30:46,598 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:30:46,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 16:30:46,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 16:30:46,799 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:30:46,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:30:46,800 INFO L85 PathProgramCache]: Analyzing trace with hash -347552145, now seen corresponding path program 37 times [2022-03-15 16:30:46,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:30:46,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681769652] [2022-03-15 16:30:46,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:30:46,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:30:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:30:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:47,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:30:47,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681769652] [2022-03-15 16:30:47,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681769652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:30:47,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551534078] [2022-03-15 16:30:47,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:30:47,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:47,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:30:47,153 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:30:47,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:30:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:30:47,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:30:47,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:30:47,918 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 16:30:47,918 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 50 treesize of output 22 [2022-03-15 16:30:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:47,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:30:48,904 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:30:48,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-03-15 16:30:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:50,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551534078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:30:50,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:30:50,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-03-15 16:30:50,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590061735] [2022-03-15 16:30:50,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:30:50,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-15 16:30:50,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:30:50,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-15 16:30:50,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2924, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:30:50,247 INFO L87 Difference]: Start difference. First operand 39944 states and 109884 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 58 states have internal predecessors, (111), 0 states have call successors, (0), 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... [2022-03-15 16:31:35,030 WARN L244 SmtUtils]: Removed 11 from assertion stack [2022-03-15 16:31:35,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 636 states. [2022-03-15 16:31:35,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 688 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220719 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=57406, Invalid=418004, Unknown=0, NotChecked=0, Total=475410 [2022-03-15 16:31:35,050 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 2073 mSDsluCounter, 3827 mSDsCounter, 0 mSdLazyCounter, 9600 mSolverCounterSat, 1129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 10729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1129 IncrementalHoareTripleChecker+Valid, 9600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:31:35,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2073 Valid, 1282 Invalid, 10729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1129 Valid, 9600 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-15 16:31:35,051 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-15 16:31:35,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-15 16:31:35,074 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 [2022-03-15 16:31:35,074 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:31:35,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 16:31:35,252 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (39944states) and FLOYD_HOARE automaton (currently 636 states, 58 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 47 for 33ms.. [2022-03-15 16:31:35,254 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-15 16:31:35,254 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-15 16:31:35,254 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-15 16:31:35,257 INFO L732 BasicCegarLoop]: Path program histogram: [37, 2, 1] [2022-03-15 16:31:35,259 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:31:35,259 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:31:35,262 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:31:35 BasicIcfg [2022-03-15 16:31:35,262 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:31:35,263 INFO L158 Benchmark]: Toolchain (without parser) took 713272.62ms. Allocated memory was 181.4MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 139.2MB in the beginning and 332.2MB in the end (delta: -193.0MB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2022-03-15 16:31:35,263 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 181.4MB. Free memory is still 140.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:31:35,263 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.49ms. Allocated memory is still 181.4MB. Free memory was 139.2MB in the beginning and 137.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:31:35,263 INFO L158 Benchmark]: Boogie Preprocessor took 16.07ms. Allocated memory is still 181.4MB. Free memory was 137.7MB in the beginning and 136.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:31:35,263 INFO L158 Benchmark]: RCFGBuilder took 195.17ms. Allocated memory is still 181.4MB. Free memory was 136.7MB in the beginning and 127.3MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 16:31:35,263 INFO L158 Benchmark]: TraceAbstraction took 713031.42ms. Allocated memory was 181.4MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 126.9MB in the beginning and 332.2MB in the end (delta: -205.3MB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. [2022-03-15 16:31:35,264 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 0.13ms. Allocated memory is still 181.4MB. Free memory is still 140.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.49ms. Allocated memory is still 181.4MB. Free memory was 139.2MB in the beginning and 137.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.07ms. Allocated memory is still 181.4MB. Free memory was 137.7MB in the beginning and 136.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 195.17ms. Allocated memory is still 181.4MB. Free memory was 136.7MB in the beginning and 127.3MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 713031.42ms. Allocated memory was 181.4MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 126.9MB in the beginning and 332.2MB in the end (delta: -205.3MB). Peak memory consumption was 2.2GB. 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: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (39944states) and FLOYD_HOARE automaton (currently 636 states, 58 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 47 for 33ms.. - TimeoutResultAtElement [Line: 58]: 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 (39944states) and FLOYD_HOARE automaton (currently 636 states, 58 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 47 for 33ms.. - TimeoutResultAtElement [Line: 57]: 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 (39944states) and FLOYD_HOARE automaton (currently 636 states, 58 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 47 for 33ms.. - TimeoutResultAtElement [Line: 57]: 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 (39944states) and FLOYD_HOARE automaton (currently 636 states, 58 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 47 for 33ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 712.9s, OverallIterations: 40, TraceHistogramMax: 4, PathProgramHistogramMax: 37, EmptinessCheckTime: 0.9s, AutomataDifference: 622.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 45200 SdHoareTripleChecker+Valid, 86.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 45200 mSDsluCounter, 50809 SdHoareTripleChecker+Invalid, 73.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 25744 IncrementalHoareTripleChecker+Unchecked, 105741 mSDsCounter, 21651 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 175077 IncrementalHoareTripleChecker+Invalid, 222472 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21651 mSolverCounterUnsat, 2544 mSDtfsCounter, 175077 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14138 GetRequests, 1978 SyntacticMatches, 115 SemanticMatches, 12044 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2332393 ImplicationChecksByTransitivity, 534.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39944occurred in iteration=39, InterpolantAutomatonStates: 10137, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 12.8s AutomataMinimizationTime, 39 MinimizatonAttempts, 492652 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 66.7s InterpolantComputationTime, 2768 NumberOfCodeBlocks, 2768 NumberOfCodeBlocksAsserted, 141 NumberOfCheckSat, 4008 ConstructedInterpolants, 101 QuantifiedInterpolants, 54679 SizeOfPredicates, 447 NumberOfNonLiveVariables, 3290 ConjunctsInSsa, 899 ConjunctsInUnsatCore, 114 InterpolantComputations, 3 PerfectInterpolantSequences, 268/2722 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