/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/min-max-inc.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:17:04,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:17:04,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:17:04,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:17:04,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 16:17:04,241 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:17:04,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:17:04,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:17:04,241 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:17:04,242 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:17:04,242 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:17:04,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:17:04,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:17:04,243 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:17:04,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:17:04,244 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:17:04,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:17:04,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:17:04,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:17:04,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:17:04,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:17:04,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:17:04,245 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:17:04,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:17:04,245 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:17:04,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:17:04,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:17:04,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:17:04,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:17:04,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:17:04,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:17:04,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:17:04,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:17:04,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:17:04,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:17:04,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:17:04,247 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:17:04,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:17:04,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:17:04,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:17:04,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:17:04,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:17:04,476 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:17:04,477 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:17:04,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl [2022-03-15 16:17:04,478 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl' [2022-03-15 16:17:04,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:17:04,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:17:04,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:17:04,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:17:04,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:17:04,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:04" (1/1) ... [2022-03-15 16:17:04,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:04" (1/1) ... [2022-03-15 16:17:04,542 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:17:04,543 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:17:04,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:17:04,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:17:04,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:17:04,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:04" (1/1) ... [2022-03-15 16:17:04,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:04" (1/1) ... [2022-03-15 16:17:04,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:04" (1/1) ... [2022-03-15 16:17:04,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:04" (1/1) ... [2022-03-15 16:17:04,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:04" (1/1) ... [2022-03-15 16:17:04,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:04" (1/1) ... [2022-03-15 16:17:04,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:04" (1/1) ... [2022-03-15 16:17:04,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:17:04,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:17:04,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:17:04,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:17:04,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:04" (1/1) ... [2022-03-15 16:17:04,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:17:04,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:04,593 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 16:17:04,626 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 16:17:04,644 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:17:04,645 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:17:04,645 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:17:04,645 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:17:04,645 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:17:04,645 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:17:04,645 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:17:04,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:17:04,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:17:04,645 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 16:17:04,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 16:17:04,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 16:17:04,646 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-15 16:17:04,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-15 16:17:04,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-15 16:17:04,647 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 16:17:04,686 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:17:04,688 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:17:04,836 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:17:04,849 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:17:04,849 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:17:04,851 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:17:04 BoogieIcfgContainer [2022-03-15 16:17:04,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:17:04,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:17:04,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:17:04,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:17:04,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:04" (1/2) ... [2022-03-15 16:17:04,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1611c7 and model type min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:17:04, skipping insertion in model container [2022-03-15 16:17:04,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:17:04" (2/2) ... [2022-03-15 16:17:04,859 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc.wvr.bpl [2022-03-15 16:17:04,863 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:17:04,863 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:17:04,863 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:17:04,863 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:17:04,915 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-15 16:17:04,959 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:17:04,966 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 16:17:04,972 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-15 16:17:04,981 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 35 transitions, 102 flow [2022-03-15 16:17:05,140 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:17:05,171 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:05,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:05,173 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:05,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:05,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1693976829, now seen corresponding path program 1 times [2022-03-15 16:17:05,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:05,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378413632] [2022-03-15 16:17:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:05,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:05,320 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 16:17:05,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:05,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378413632] [2022-03-15 16:17:05,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378413632] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:17:05,321 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:17:05,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:17:05,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309464331] [2022-03-15 16:17:05,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:05,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:17:05,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:05,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:17:05,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:17:05,354 INFO L87 Difference]: Start difference. First operand has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:05,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:05,455 INFO L93 Difference]: Finished difference Result 961 states and 3450 transitions. [2022-03-15 16:17:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:17:05,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:17:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:05,475 INFO L225 Difference]: With dead ends: 961 [2022-03-15 16:17:05,476 INFO L226 Difference]: Without dead ends: 614 [2022-03-15 16:17:05,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:17:05,481 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:05,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 71 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:05,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-03-15 16:17:05,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2022-03-15 16:17:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.592169657422512) internal successors, (2202), 613 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2202 transitions. [2022-03-15 16:17:05,628 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2202 transitions. Word has length 23 [2022-03-15 16:17:05,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:05,629 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 2202 transitions. [2022-03-15 16:17:05,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2202 transitions. [2022-03-15 16:17:05,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:17:05,634 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:05,634 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] [2022-03-15 16:17:05,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:17:05,635 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:05,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:05,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1387371365, now seen corresponding path program 2 times [2022-03-15 16:17:05,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:05,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923811972] [2022-03-15 16:17:05,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:05,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:05,701 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 16:17:05,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:05,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923811972] [2022-03-15 16:17:05,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923811972] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:17:05,702 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:17:05,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:17:05,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642192836] [2022-03-15 16:17:05,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:05,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:17:05,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:05,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:17:05,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:17:05,704 INFO L87 Difference]: Start difference. First operand 614 states and 2202 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:05,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:05,911 INFO L93 Difference]: Finished difference Result 2435 states and 8733 transitions. [2022-03-15 16:17:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:17:05,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:17:05,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:05,927 INFO L225 Difference]: With dead ends: 2435 [2022-03-15 16:17:05,928 INFO L226 Difference]: Without dead ends: 1497 [2022-03-15 16:17:05,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:17:05,939 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:05,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 150 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:05,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2022-03-15 16:17:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 859. [2022-03-15 16:17:06,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.5442890442890445) internal successors, (3041), 858 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 3041 transitions. [2022-03-15 16:17:06,006 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 3041 transitions. Word has length 23 [2022-03-15 16:17:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:06,006 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 3041 transitions. [2022-03-15 16:17:06,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 3041 transitions. [2022-03-15 16:17:06,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:17:06,011 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:06,011 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] [2022-03-15 16:17:06,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:17:06,012 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:06,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:06,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1797120999, now seen corresponding path program 3 times [2022-03-15 16:17:06,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:06,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850847651] [2022-03-15 16:17:06,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:06,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:06,084 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 16:17:06,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:06,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850847651] [2022-03-15 16:17:06,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850847651] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:17:06,085 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:17:06,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:17:06,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975863909] [2022-03-15 16:17:06,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:06,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:17:06,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:06,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:17:06,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:17:06,087 INFO L87 Difference]: Start difference. First operand 859 states and 3041 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:06,283 INFO L93 Difference]: Finished difference Result 3289 states and 11673 transitions. [2022-03-15 16:17:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:17:06,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:17:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:06,299 INFO L225 Difference]: With dead ends: 3289 [2022-03-15 16:17:06,300 INFO L226 Difference]: Without dead ends: 2391 [2022-03-15 16:17:06,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:17:06,306 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 103 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:06,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 162 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:06,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2022-03-15 16:17:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 910. [2022-03-15 16:17:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.553355335533553) internal successors, (3230), 909 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3230 transitions. [2022-03-15 16:17:06,355 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3230 transitions. Word has length 23 [2022-03-15 16:17:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:06,355 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 3230 transitions. [2022-03-15 16:17:06,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:06,356 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3230 transitions. [2022-03-15 16:17:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:17:06,359 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:06,360 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] [2022-03-15 16:17:06,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 16:17:06,360 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:06,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash 61402933, now seen corresponding path program 4 times [2022-03-15 16:17:06,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:06,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436616110] [2022-03-15 16:17:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:06,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:06,427 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 16:17:06,428 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:06,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436616110] [2022-03-15 16:17:06,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436616110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:17:06,428 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:17:06,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:17:06,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871668265] [2022-03-15 16:17:06,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:06,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:17:06,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:17:06,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:17:06,431 INFO L87 Difference]: Start difference. First operand 910 states and 3230 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:06,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:06,476 INFO L93 Difference]: Finished difference Result 1081 states and 3814 transitions. [2022-03-15 16:17:06,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:17:06,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:17:06,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:06,483 INFO L225 Difference]: With dead ends: 1081 [2022-03-15 16:17:06,484 INFO L226 Difference]: Without dead ends: 830 [2022-03-15 16:17:06,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:17:06,488 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 27 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:06,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 66 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:17:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-03-15 16:17:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2022-03-15 16:17:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4861278648974667) internal successors, (2890), 829 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2890 transitions. [2022-03-15 16:17:06,518 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2890 transitions. Word has length 23 [2022-03-15 16:17:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:06,518 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2890 transitions. [2022-03-15 16:17:06,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2890 transitions. [2022-03-15 16:17:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 16:17:06,522 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:06,522 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 16:17:06,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 16:17:06,522 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:06,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:06,523 INFO L85 PathProgramCache]: Analyzing trace with hash -432116485, now seen corresponding path program 1 times [2022-03-15 16:17:06,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:06,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088241051] [2022-03-15 16:17:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:06,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:06,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:06,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088241051] [2022-03-15 16:17:06,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088241051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:06,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531476747] [2022-03-15 16:17:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:06,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:06,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:06,624 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 16:17:06,625 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 16:17:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:06,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:17:06,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:06,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:06,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531476747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:06,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:06,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-15 16:17:06,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490469073] [2022-03-15 16:17:06,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:06,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:17:06,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:06,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:17:06,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:17:06,875 INFO L87 Difference]: Start difference. First operand 830 states and 2890 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) 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 16:17:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:06,977 INFO L93 Difference]: Finished difference Result 1914 states and 6600 transitions. [2022-03-15 16:17:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:17:06,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) 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 25 [2022-03-15 16:17:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:06,990 INFO L225 Difference]: With dead ends: 1914 [2022-03-15 16:17:06,990 INFO L226 Difference]: Without dead ends: 1914 [2022-03-15 16:17:06,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:17:06,994 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 84 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:06,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 97 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2022-03-15 16:17:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1087. [2022-03-15 16:17:07,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.603130755064457) internal successors, (3913), 1086 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:07,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3913 transitions. [2022-03-15 16:17:07,039 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3913 transitions. Word has length 25 [2022-03-15 16:17:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:07,040 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 3913 transitions. [2022-03-15 16:17:07,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) 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 16:17:07,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3913 transitions. [2022-03-15 16:17:07,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 16:17:07,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:07,052 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 16:17:07,077 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 16:17:07,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:07,268 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:07,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:07,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1214414653, now seen corresponding path program 1 times [2022-03-15 16:17:07,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:07,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661119245] [2022-03-15 16:17:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:07,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:07,312 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 16:17:07,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:07,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661119245] [2022-03-15 16:17:07,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661119245] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:17:07,312 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:17:07,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:17:07,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030961883] [2022-03-15 16:17:07,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:07,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:17:07,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:07,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:17:07,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:17:07,314 INFO L87 Difference]: Start difference. First operand 1087 states and 3913 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:07,393 INFO L93 Difference]: Finished difference Result 1486 states and 5095 transitions. [2022-03-15 16:17:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:17:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 16:17:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:07,403 INFO L225 Difference]: With dead ends: 1486 [2022-03-15 16:17:07,403 INFO L226 Difference]: Without dead ends: 1456 [2022-03-15 16:17:07,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:17:07,404 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:07,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 54 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:17:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2022-03-15 16:17:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1266. [2022-03-15 16:17:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.5177865612648223) internal successors, (4450), 1265 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4450 transitions. [2022-03-15 16:17:07,444 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4450 transitions. Word has length 25 [2022-03-15 16:17:07,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:07,444 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 4450 transitions. [2022-03-15 16:17:07,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:07,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4450 transitions. [2022-03-15 16:17:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 16:17:07,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:07,449 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 16:17:07,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-15 16:17:07,449 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:07,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:07,449 INFO L85 PathProgramCache]: Analyzing trace with hash -831286723, now seen corresponding path program 1 times [2022-03-15 16:17:07,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:07,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879229879] [2022-03-15 16:17:07,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:07,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:07,477 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 16:17:07,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:07,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879229879] [2022-03-15 16:17:07,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879229879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:17:07,477 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:17:07,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:17:07,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212615907] [2022-03-15 16:17:07,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:07,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:17:07,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:07,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:17:07,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:17:07,478 INFO L87 Difference]: Start difference. First operand 1266 states and 4450 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:07,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:07,551 INFO L93 Difference]: Finished difference Result 1766 states and 6108 transitions. [2022-03-15 16:17:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:17:07,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 16:17:07,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:07,563 INFO L225 Difference]: With dead ends: 1766 [2022-03-15 16:17:07,563 INFO L226 Difference]: Without dead ends: 1644 [2022-03-15 16:17:07,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:17:07,565 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:07,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 54 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:17:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2022-03-15 16:17:07,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1367. [2022-03-15 16:17:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.5439238653001466) internal successors, (4841), 1366 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4841 transitions. [2022-03-15 16:17:07,612 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4841 transitions. Word has length 25 [2022-03-15 16:17:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:07,613 INFO L470 AbstractCegarLoop]: Abstraction has 1367 states and 4841 transitions. [2022-03-15 16:17:07,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4841 transitions. [2022-03-15 16:17:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 16:17:07,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:07,618 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 16:17:07,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-15 16:17:07,619 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:07,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:07,620 INFO L85 PathProgramCache]: Analyzing trace with hash -707926211, now seen corresponding path program 2 times [2022-03-15 16:17:07,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:07,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805781956] [2022-03-15 16:17:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:07,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:07,696 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 16:17:07,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:07,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805781956] [2022-03-15 16:17:07,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805781956] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:17:07,697 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:17:07,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:17:07,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425617922] [2022-03-15 16:17:07,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:07,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:17:07,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:07,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:17:07,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:17:07,698 INFO L87 Difference]: Start difference. First operand 1367 states and 4841 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:07,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:07,751 INFO L93 Difference]: Finished difference Result 1634 states and 5618 transitions. [2022-03-15 16:17:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:17:07,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 16:17:07,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:07,760 INFO L225 Difference]: With dead ends: 1634 [2022-03-15 16:17:07,760 INFO L226 Difference]: Without dead ends: 1526 [2022-03-15 16:17:07,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:17:07,761 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 61 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:07,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 55 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:17:07,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2022-03-15 16:17:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1198. [2022-03-15 16:17:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.5129490392648286) internal successors, (4205), 1197 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4205 transitions. [2022-03-15 16:17:07,802 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4205 transitions. Word has length 25 [2022-03-15 16:17:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:07,803 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 4205 transitions. [2022-03-15 16:17:07,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:07,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4205 transitions. [2022-03-15 16:17:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 16:17:07,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:07,807 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 16:17:07,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-15 16:17:07,807 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:07,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:07,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1107714437, now seen corresponding path program 2 times [2022-03-15 16:17:07,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:07,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531340310] [2022-03-15 16:17:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:07,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:07,856 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 16:17:07,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:07,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531340310] [2022-03-15 16:17:07,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531340310] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:17:07,857 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:17:07,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:17:07,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134904595] [2022-03-15 16:17:07,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:07,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:17:07,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:07,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:17:07,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:17:07,859 INFO L87 Difference]: Start difference. First operand 1198 states and 4205 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:07,915 INFO L93 Difference]: Finished difference Result 1639 states and 5650 transitions. [2022-03-15 16:17:07,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:17:07,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 16:17:07,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:07,933 INFO L225 Difference]: With dead ends: 1639 [2022-03-15 16:17:07,934 INFO L226 Difference]: Without dead ends: 1541 [2022-03-15 16:17:07,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:17:07,935 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:07,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 56 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:17:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2022-03-15 16:17:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1175. [2022-03-15 16:17:07,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 3.5264054514480407) internal successors, (4140), 1174 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 4140 transitions. [2022-03-15 16:17:07,971 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 4140 transitions. Word has length 25 [2022-03-15 16:17:07,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:07,971 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 4140 transitions. [2022-03-15 16:17:07,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 4140 transitions. [2022-03-15 16:17:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 16:17:07,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:07,975 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 16:17:07,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-15 16:17:07,976 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:07,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:07,977 INFO L85 PathProgramCache]: Analyzing trace with hash 823736187, now seen corresponding path program 3 times [2022-03-15 16:17:07,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:07,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462293355] [2022-03-15 16:17:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:07,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:08,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:08,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462293355] [2022-03-15 16:17:08,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462293355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:08,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738086856] [2022-03-15 16:17:08,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:17:08,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:08,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:08,028 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 16:17:08,066 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 16:17:08,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:17:08,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:08,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-15 16:17:08,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:08,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:08,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738086856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:08,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:08,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-15 16:17:08,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779699868] [2022-03-15 16:17:08,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:08,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:17:08,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:08,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:17:08,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:17:08,185 INFO L87 Difference]: Start difference. First operand 1175 states and 4140 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:08,263 INFO L93 Difference]: Finished difference Result 1245 states and 4400 transitions. [2022-03-15 16:17:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:17:08,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 16:17:08,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:08,270 INFO L225 Difference]: With dead ends: 1245 [2022-03-15 16:17:08,270 INFO L226 Difference]: Without dead ends: 1159 [2022-03-15 16:17:08,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:17:08,271 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 55 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:08,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 92 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-03-15 16:17:08,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1012. [2022-03-15 16:17:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 3.5519287833827895) internal successors, (3591), 1011 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3591 transitions. [2022-03-15 16:17:08,310 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3591 transitions. Word has length 25 [2022-03-15 16:17:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:08,310 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 3591 transitions. [2022-03-15 16:17:08,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3591 transitions. [2022-03-15 16:17:08,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:17:08,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:08,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:08,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:08,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-15 16:17:08,539 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:08,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:08,539 INFO L85 PathProgramCache]: Analyzing trace with hash 91352989, now seen corresponding path program 1 times [2022-03-15 16:17:08,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:08,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074066932] [2022-03-15 16:17:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:08,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:08,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:08,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074066932] [2022-03-15 16:17:08,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074066932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:08,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128573210] [2022-03-15 16:17:08,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:08,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:08,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:08,586 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 16:17:08,618 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 16:17:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:08,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-15 16:17:08,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:08,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:08,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128573210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:08,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:08,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-15 16:17:08,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869516519] [2022-03-15 16:17:08,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:08,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:17:08,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:08,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:17:08,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:17:08,744 INFO L87 Difference]: Start difference. First operand 1012 states and 3591 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:08,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:08,809 INFO L93 Difference]: Finished difference Result 1208 states and 4319 transitions. [2022-03-15 16:17:08,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:17:08,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:17:08,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:08,817 INFO L225 Difference]: With dead ends: 1208 [2022-03-15 16:17:08,817 INFO L226 Difference]: Without dead ends: 1208 [2022-03-15 16:17:08,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:17:08,818 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:08,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 66 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:17:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-03-15 16:17:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1044. [2022-03-15 16:17:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.5618408437200384) internal successors, (3715), 1043 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3715 transitions. [2022-03-15 16:17:08,845 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3715 transitions. Word has length 27 [2022-03-15 16:17:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:08,846 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 3715 transitions. [2022-03-15 16:17:08,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3715 transitions. [2022-03-15 16:17:08,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:17:08,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:08,849 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:08,876 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 16:17:09,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:09,070 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:09,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1411357505, now seen corresponding path program 1 times [2022-03-15 16:17:09,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:09,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175552538] [2022-03-15 16:17:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:09,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:09,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:09,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175552538] [2022-03-15 16:17:09,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175552538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:09,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450049584] [2022-03-15 16:17:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:09,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:09,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:09,211 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 16:17:09,245 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 16:17:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:09,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 16:17:09,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:09,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 19 treesize of output 14 [2022-03-15 16:17:09,481 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 13 treesize of output 9 [2022-03-15 16:17:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:09,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:09,951 INFO L353 Elim1Store]: treesize reduction 10, result has 79.6 percent of original size [2022-03-15 16:17:09,951 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 77 treesize of output 93 [2022-03-15 16:17:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:10,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450049584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:10,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:10,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:17:10,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524940343] [2022-03-15 16:17:10,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:10,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:17:10,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:10,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:17:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:17:10,232 INFO L87 Difference]: Start difference. First operand 1044 states and 3715 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:10,682 INFO L93 Difference]: Finished difference Result 4135 states and 14907 transitions. [2022-03-15 16:17:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:17:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 16:17:10,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:10,692 INFO L225 Difference]: With dead ends: 4135 [2022-03-15 16:17:10,693 INFO L226 Difference]: Without dead ends: 2563 [2022-03-15 16:17:10,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:17:10,694 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 335 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:10,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 277 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 307 Invalid, 0 Unknown, 178 Unchecked, 0.2s Time] [2022-03-15 16:17:10,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2022-03-15 16:17:10,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 1567. [2022-03-15 16:17:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1566 states have (on average 3.5178799489144317) internal successors, (5509), 1566 states have internal predecessors, (5509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:10,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 5509 transitions. [2022-03-15 16:17:10,751 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 5509 transitions. Word has length 29 [2022-03-15 16:17:10,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:10,751 INFO L470 AbstractCegarLoop]: Abstraction has 1567 states and 5509 transitions. [2022-03-15 16:17:10,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:10,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 5509 transitions. [2022-03-15 16:17:10,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:17:10,756 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:10,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:10,778 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 16:17:10,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:10,973 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:10,973 INFO L85 PathProgramCache]: Analyzing trace with hash -943724415, now seen corresponding path program 2 times [2022-03-15 16:17:10,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:10,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643998099] [2022-03-15 16:17:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:10,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:11,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:11,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643998099] [2022-03-15 16:17:11,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643998099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:11,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404483800] [2022-03-15 16:17:11,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:17:11,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:11,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:11,029 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 16:17:11,058 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 16:17:11,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:17:11,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:11,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:17:11,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:11,117 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 16:17:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:11,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:11,251 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:17:11,251 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 37 treesize of output 28 [2022-03-15 16:17:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:11,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404483800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:11,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:11,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-15 16:17:11,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244207485] [2022-03-15 16:17:11,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:11,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:17:11,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:11,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:17:11,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:17:11,267 INFO L87 Difference]: Start difference. First operand 1567 states and 5509 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:11,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:11,766 INFO L93 Difference]: Finished difference Result 7475 states and 26946 transitions. [2022-03-15 16:17:11,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:17:11,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 16:17:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:11,779 INFO L225 Difference]: With dead ends: 7475 [2022-03-15 16:17:11,779 INFO L226 Difference]: Without dead ends: 3223 [2022-03-15 16:17:11,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:17:11,781 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 358 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:11,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 411 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:17:11,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2022-03-15 16:17:11,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 1476. [2022-03-15 16:17:11,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.4894915254237286) internal successors, (5147), 1475 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 5147 transitions. [2022-03-15 16:17:11,850 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 5147 transitions. Word has length 29 [2022-03-15 16:17:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:11,850 INFO L470 AbstractCegarLoop]: Abstraction has 1476 states and 5147 transitions. [2022-03-15 16:17:11,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 5147 transitions. [2022-03-15 16:17:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:17:11,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:11,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:11,882 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 16:17:12,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 16:17:12,071 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:12,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:12,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1636464349, now seen corresponding path program 3 times [2022-03-15 16:17:12,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:12,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371413892] [2022-03-15 16:17:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:12,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:12,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:12,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371413892] [2022-03-15 16:17:12,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371413892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:12,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843553284] [2022-03-15 16:17:12,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:17:12,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:12,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:12,216 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 16:17:12,218 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 16:17:12,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:17:12,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:12,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 16:17:12,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:12,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-03-15 16:17:12,420 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 16:17:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:12,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:12,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843553284] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:12,756 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 16:17:12,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 17 [2022-03-15 16:17:12,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696167500] [2022-03-15 16:17:12,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:12,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:17:12,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:12,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:17:12,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:17:12,757 INFO L87 Difference]: Start difference. First operand 1476 states and 5147 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:12,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:12,917 INFO L93 Difference]: Finished difference Result 2844 states and 10081 transitions. [2022-03-15 16:17:12,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:17:12,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 16:17:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:12,924 INFO L225 Difference]: With dead ends: 2844 [2022-03-15 16:17:12,925 INFO L226 Difference]: Without dead ends: 2109 [2022-03-15 16:17:12,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:17:12,925 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 113 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:12,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 131 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:12,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2022-03-15 16:17:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1216. [2022-03-15 16:17:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 3.405761316872428) internal successors, (4138), 1215 states have internal predecessors, (4138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 4138 transitions. [2022-03-15 16:17:12,960 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 4138 transitions. Word has length 29 [2022-03-15 16:17:12,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:12,960 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 4138 transitions. [2022-03-15 16:17:12,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 4138 transitions. [2022-03-15 16:17:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:17:12,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:12,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:12,986 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 16:17:13,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:13,186 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:13,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:13,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2131567041, now seen corresponding path program 4 times [2022-03-15 16:17:13,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:13,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302221719] [2022-03-15 16:17:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:13,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:13,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:13,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302221719] [2022-03-15 16:17:13,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302221719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:13,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378608894] [2022-03-15 16:17:13,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:17:13,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:13,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:13,253 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 16:17:13,278 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 16:17:13,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:17:13,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:13,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 16:17:13,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:13,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-03-15 16:17:13,367 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 16:17:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:13,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:13,523 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:17:13,523 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 52 treesize of output 47 [2022-03-15 16:17:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:13,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378608894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:13,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:13,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 16:17:13,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535800565] [2022-03-15 16:17:13,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:13,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:17:13,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:13,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:17:13,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:17:13,551 INFO L87 Difference]: Start difference. First operand 1216 states and 4138 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 16:17:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:13,787 INFO L93 Difference]: Finished difference Result 1951 states and 6704 transitions. [2022-03-15 16:17:13,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:17:13,787 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 29 [2022-03-15 16:17:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:13,790 INFO L225 Difference]: With dead ends: 1951 [2022-03-15 16:17:13,790 INFO L226 Difference]: Without dead ends: 1041 [2022-03-15 16:17:13,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:17:13,791 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 276 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:13,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 173 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:13,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-03-15 16:17:13,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 697. [2022-03-15 16:17:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.507183908045977) internal successors, (2441), 696 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2441 transitions. [2022-03-15 16:17:13,810 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2441 transitions. Word has length 29 [2022-03-15 16:17:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:13,810 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 2441 transitions. [2022-03-15 16:17:13,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 16:17:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2441 transitions. [2022-03-15 16:17:13,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:17:13,812 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:13,812 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:13,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-15 16:17:14,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:14,030 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:14,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:14,031 INFO L85 PathProgramCache]: Analyzing trace with hash 711837281, now seen corresponding path program 5 times [2022-03-15 16:17:14,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:14,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801429046] [2022-03-15 16:17:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:14,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:14,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:14,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801429046] [2022-03-15 16:17:14,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801429046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:14,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906457342] [2022-03-15 16:17:14,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:17:14,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:14,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:14,064 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 16:17:14,092 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 16:17:14,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:17:14,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:14,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:17:14,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:14,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:14,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906457342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:14,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:14,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-15 16:17:14,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699859345] [2022-03-15 16:17:14,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:14,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:17:14,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:14,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:17:14,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:17:14,227 INFO L87 Difference]: Start difference. First operand 697 states and 2441 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) 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 16:17:14,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:14,352 INFO L93 Difference]: Finished difference Result 1665 states and 5828 transitions. [2022-03-15 16:17:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:17:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) 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 31 [2022-03-15 16:17:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:14,358 INFO L225 Difference]: With dead ends: 1665 [2022-03-15 16:17:14,358 INFO L226 Difference]: Without dead ends: 1651 [2022-03-15 16:17:14,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:17:14,359 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 172 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:14,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 91 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:14,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2022-03-15 16:17:14,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1118. [2022-03-15 16:17:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.7090420769919428) internal successors, (4143), 1117 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4143 transitions. [2022-03-15 16:17:14,389 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4143 transitions. Word has length 31 [2022-03-15 16:17:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:14,389 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 4143 transitions. [2022-03-15 16:17:14,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) 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 16:17:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4143 transitions. [2022-03-15 16:17:14,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:17:14,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:14,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:14,415 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 16:17:14,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-15 16:17:14,615 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:14,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:14,616 INFO L85 PathProgramCache]: Analyzing trace with hash 451152861, now seen corresponding path program 6 times [2022-03-15 16:17:14,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:14,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820969731] [2022-03-15 16:17:14,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:14,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:14,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:14,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820969731] [2022-03-15 16:17:14,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820969731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:14,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962516287] [2022-03-15 16:17:14,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:17:14,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:14,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:14,652 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 16:17:14,653 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 16:17:14,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:17:14,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:14,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:17:14,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:14,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:14,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962516287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:14,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:14,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-15 16:17:14,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079121133] [2022-03-15 16:17:14,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:14,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:17:14,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:14,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:17:14,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:17:14,844 INFO L87 Difference]: Start difference. First operand 1118 states and 4143 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:15,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:15,440 INFO L93 Difference]: Finished difference Result 5485 states and 19215 transitions. [2022-03-15 16:17:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:17:15,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:17:15,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:15,464 INFO L225 Difference]: With dead ends: 5485 [2022-03-15 16:17:15,464 INFO L226 Difference]: Without dead ends: 5485 [2022-03-15 16:17:15,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1299, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:17:15,466 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 487 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:15,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 248 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:17:15,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5485 states. [2022-03-15 16:17:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5485 to 1710. [2022-03-15 16:17:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 3.904622586307782) internal successors, (6673), 1709 states have internal predecessors, (6673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:15,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 6673 transitions. [2022-03-15 16:17:15,551 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 6673 transitions. Word has length 31 [2022-03-15 16:17:15,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:15,552 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 6673 transitions. [2022-03-15 16:17:15,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:15,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 6673 transitions. [2022-03-15 16:17:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 16:17:15,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:15,557 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:15,582 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 16:17:15,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 16:17:15,771 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:15,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1768247525, now seen corresponding path program 7 times [2022-03-15 16:17:15,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:15,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278692635] [2022-03-15 16:17:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:15,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:17:15,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:15,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278692635] [2022-03-15 16:17:15,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278692635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:15,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056130219] [2022-03-15 16:17:15,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:17:15,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:15,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:15,813 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 16:17:15,823 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 16:17:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:15,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:17:15,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:17:15,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:17:15,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056130219] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:15,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:15,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-15 16:17:15,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238596999] [2022-03-15 16:17:15,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:15,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:17:15,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:15,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:17:15,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:17:15,982 INFO L87 Difference]: Start difference. First operand 1710 states and 6673 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:16,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:16,101 INFO L93 Difference]: Finished difference Result 3346 states and 12591 transitions. [2022-03-15 16:17:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:17:16,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 16:17:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:16,112 INFO L225 Difference]: With dead ends: 3346 [2022-03-15 16:17:16,112 INFO L226 Difference]: Without dead ends: 3346 [2022-03-15 16:17:16,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:17:16,113 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 115 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:16,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 130 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:16,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2022-03-15 16:17:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 2425. [2022-03-15 16:17:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 3.9834983498349836) internal successors, (9656), 2424 states have internal predecessors, (9656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 9656 transitions. [2022-03-15 16:17:16,207 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 9656 transitions. Word has length 33 [2022-03-15 16:17:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:16,207 INFO L470 AbstractCegarLoop]: Abstraction has 2425 states and 9656 transitions. [2022-03-15 16:17:16,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:16,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 9656 transitions. [2022-03-15 16:17:16,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:17:16,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:16,214 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, 1, 1, 1, 1] [2022-03-15 16:17:16,237 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 16:17:16,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 16:17:16,428 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:16,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:16,428 INFO L85 PathProgramCache]: Analyzing trace with hash -125943131, now seen corresponding path program 8 times [2022-03-15 16:17:16,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:16,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380792383] [2022-03-15 16:17:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:16,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:17:16,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:16,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380792383] [2022-03-15 16:17:16,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380792383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:16,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016916644] [2022-03-15 16:17:16,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:17:16,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:16,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:16,606 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 16:17:16,607 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 16:17:16,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:17:16,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:16,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:17:16,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:16,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-03-15 16:17:16,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 19 treesize of output 14 [2022-03-15 16:17:16,883 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 13 treesize of output 9 [2022-03-15 16:17:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:16,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:19,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:19,141 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 212 treesize of output 226 [2022-03-15 16:17:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:19,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016916644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:19,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:19,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 16:17:19,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109229672] [2022-03-15 16:17:19,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:19,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:17:19,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:19,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:17:19,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=354, Unknown=1, NotChecked=0, Total=420 [2022-03-15 16:17:19,679 INFO L87 Difference]: Start difference. First operand 2425 states and 9656 transitions. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:20,233 INFO L93 Difference]: Finished difference Result 5719 states and 22595 transitions. [2022-03-15 16:17:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:17:20,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:17:20,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:20,239 INFO L225 Difference]: With dead ends: 5719 [2022-03-15 16:17:20,239 INFO L226 Difference]: Without dead ends: 2651 [2022-03-15 16:17:20,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=153, Invalid=838, Unknown=1, NotChecked=0, Total=992 [2022-03-15 16:17:20,240 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 193 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:20,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 442 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 731 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-03-15 16:17:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2022-03-15 16:17:20,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2473. [2022-03-15 16:17:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 3.954692556634304) internal successors, (9776), 2472 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 9776 transitions. [2022-03-15 16:17:20,296 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 9776 transitions. Word has length 35 [2022-03-15 16:17:20,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:20,296 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 9776 transitions. [2022-03-15 16:17:20,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:20,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 9776 transitions. [2022-03-15 16:17:20,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 16:17:20,302 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:20,302 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:20,324 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 16:17:20,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:20,515 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:20,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:20,516 INFO L85 PathProgramCache]: Analyzing trace with hash 29767999, now seen corresponding path program 9 times [2022-03-15 16:17:20,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:20,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634091899] [2022-03-15 16:17:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:20,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:17:20,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:20,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634091899] [2022-03-15 16:17:20,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634091899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:20,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876528843] [2022-03-15 16:17:20,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:17:20,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:20,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:20,562 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 16:17:20,564 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 16:17:20,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:17:20,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:20,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:17:20,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:20,787 INFO L353 Elim1Store]: treesize reduction 14, result has 63.2 percent of original size [2022-03-15 16:17:20,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 37 [2022-03-15 16:17:21,012 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 23 treesize of output 17 [2022-03-15 16:17:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:17:21,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:31,415 INFO L353 Elim1Store]: treesize reduction 5, result has 82.8 percent of original size [2022-03-15 16:17:31,416 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 60 treesize of output 71 [2022-03-15 16:17:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:17:31,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876528843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:31,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:31,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 12] total 26 [2022-03-15 16:17:31,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989410822] [2022-03-15 16:17:31,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:31,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:17:31,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:31,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:17:31,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=599, Unknown=5, NotChecked=0, Total=702 [2022-03-15 16:17:31,622 INFO L87 Difference]: Start difference. First operand 2473 states and 9776 transitions. Second operand has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 26 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:38,811 WARN L228 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 43 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:17:46,920 WARN L228 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:17:57,243 WARN L228 SmtUtils]: Spent 10.11s on a formula simplification. DAG size of input: 47 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:18:04,113 WARN L228 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:18:10,244 WARN L228 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 44 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:18:16,358 WARN L228 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:18:23,373 WARN L228 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 48 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:18:32,362 WARN L228 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:18:39,361 WARN L228 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:18:45,436 WARN L228 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:18:59,595 WARN L228 SmtUtils]: Spent 14.13s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:19:07,697 WARN L228 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:19:17,024 WARN L228 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:19:31,231 WARN L228 SmtUtils]: Spent 14.14s on a formula simplification. DAG size of input: 48 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:19:37,343 WARN L228 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:19:45,444 WARN L228 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:19:53,656 WARN L228 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:20:00,563 WARN L228 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:20:07,088 WARN L228 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:20:15,305 WARN L228 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:20:21,435 WARN L228 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:20:27,547 WARN L228 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:20:47,978 WARN L228 SmtUtils]: Spent 20.17s on a formula simplification. DAG size of input: 42 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:20:54,050 WARN L228 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:21:00,147 WARN L228 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:21:48,635 WARN L228 SmtUtils]: Spent 36.26s on a formula simplification. DAG size of input: 51 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:21:57,590 WARN L228 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:22:13,751 WARN L228 SmtUtils]: Spent 16.13s on a formula simplification. DAG size of input: 37 DAG size of output: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:22:19,862 WARN L228 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:22:27,949 WARN L228 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:22:48,144 WARN L228 SmtUtils]: Spent 20.17s on a formula simplification. DAG size of input: 41 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:22:56,457 WARN L228 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:23:04,544 WARN L228 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:23:22,754 WARN L228 SmtUtils]: Spent 18.18s on a formula simplification. DAG size of input: 42 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:23:43,108 WARN L228 SmtUtils]: Spent 20.21s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:23:49,185 WARN L228 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:24:01,846 WARN L228 SmtUtils]: Spent 12.63s on a formula simplification. DAG size of input: 38 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:24:54,541 WARN L228 SmtUtils]: Spent 28.24s on a formula simplification. DAG size of input: 52 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:26:15,100 WARN L228 SmtUtils]: Spent 32.26s on a formula simplification. DAG size of input: 53 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:26:33,193 WARN L228 SmtUtils]: Spent 7.14s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:26:53,440 WARN L228 SmtUtils]: Spent 20.21s on a formula simplification. DAG size of input: 46 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:27:01,539 WARN L228 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:27:07,803 WARN L228 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:27:54,334 WARN L228 SmtUtils]: Spent 38.27s on a formula simplification. DAG size of input: 50 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:28:29,898 WARN L228 SmtUtils]: Spent 20.18s on a formula simplification. DAG size of input: 41 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:28:48,188 WARN L228 SmtUtils]: Spent 18.20s on a formula simplification. DAG size of input: 45 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:29:05,481 WARN L228 SmtUtils]: Spent 17.21s on a formula simplification. DAG size of input: 46 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:29:52,020 WARN L228 SmtUtils]: Spent 30.26s on a formula simplification. DAG size of input: 51 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:30:06,418 WARN L228 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:30:13,431 WARN L228 SmtUtils]: Spent 5.20s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:30:19,579 WARN L228 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:30:33,998 WARN L228 SmtUtils]: Spent 14.39s on a formula simplification. DAG size of input: 45 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:30:40,082 WARN L228 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:30:46,254 WARN L228 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:30:55,732 WARN L228 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:31:20,086 WARN L228 SmtUtils]: Spent 24.23s on a formula simplification. DAG size of input: 46 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:31:26,183 WARN L228 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-15 16:31:32,316 WARN L228 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2022-03-15 16:31:39,226 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 16:31:39,226 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:31:40,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:31:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 490 states. [2022-03-15 16:31:40,519 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-03-15 16:31:40,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 68 SyntacticMatches, 19 SemanticMatches, 503 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 124059 ImplicationChecksByTransitivity, 848.6s TimeCoverageRelationStatistics Valid=23381, Invalid=231064, Unknown=75, NotChecked=0, Total=254520 [2022-03-15 16:31:40,540 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 2067 mSDsluCounter, 3714 mSDsCounter, 0 mSdLazyCounter, 6644 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2067 SdHoareTripleChecker+Valid, 2287 SdHoareTripleChecker+Invalid, 10632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 6644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3529 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:31:40,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2067 Valid, 2287 Invalid, 10632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 6644 Invalid, 0 Unknown, 3529 Unchecked, 3.5s Time] [2022-03-15 16:31:40,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-15 16:31:40,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 [2022-03-15 16:31:40,546 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Not enough levels on assertion stack at de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.pop(UndoableWrapperScript.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.restore(UndoableWrapperScript.java:87) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:242) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:160) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-03-15 16:31:40,550 INFO L158 Benchmark]: Toolchain (without parser) took 876037.01ms. Allocated memory was 190.8MB in the beginning and 377.5MB in the end (delta: 186.6MB). Free memory was 150.6MB in the beginning and 256.3MB in the end (delta: -105.8MB). Peak memory consumption was 277.3MB. Max. memory is 8.0GB. [2022-03-15 16:31:40,550 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 190.8MB. Free memory is still 151.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:31:40,550 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.64ms. Allocated memory is still 190.8MB. Free memory was 150.6MB in the beginning and 149.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:31:40,552 INFO L158 Benchmark]: Boogie Preprocessor took 17.29ms. Allocated memory is still 190.8MB. Free memory was 149.0MB in the beginning and 148.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:31:40,552 INFO L158 Benchmark]: RCFGBuilder took 288.74ms. Allocated memory is still 190.8MB. Free memory was 147.9MB in the beginning and 138.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-15 16:31:40,552 INFO L158 Benchmark]: TraceAbstraction took 875696.67ms. Allocated memory was 190.8MB in the beginning and 377.5MB in the end (delta: 186.6MB). Free memory was 137.5MB in the beginning and 256.3MB in the end (delta: -118.8MB). Peak memory consumption was 264.7MB. Max. memory is 8.0GB. [2022-03-15 16:31:40,559 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 190.8MB. Free memory is still 151.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.64ms. Allocated memory is still 190.8MB. Free memory was 150.6MB in the beginning and 149.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.29ms. Allocated memory is still 190.8MB. Free memory was 149.0MB in the beginning and 148.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 288.74ms. Allocated memory is still 190.8MB. Free memory was 147.9MB in the beginning and 138.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 875696.67ms. Allocated memory was 190.8MB in the beginning and 377.5MB in the end (delta: 186.6MB). Free memory was 137.5MB in the beginning and 256.3MB in the end (delta: -118.8MB). Peak memory consumption was 264.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Not enough levels on assertion stack de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Not enough levels on assertion stack: de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown